Answer in brief
CVE-2026-20303 records a Critical severity (CVSS 9.9) vulnerability in Cisco Catalyst SD-WAN Security Hardening Release - Input Validation Vulnerabilities. The current sources do not mark it as known exploited. The current feed maps Cisco/Cisco Catalyst SD-WAN Controller (generic), Cisco/Cisco Catalyst SD-WAN Manager (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Cisco/Cisco Catalyst SD-WAN Controller (generic), Cisco/Cisco Catalyst SD-WAN Manager (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Cisco/Cisco Catalyst SD-WAN Controllergeneric | 20.6.4 || 20.9.2 || 20.3.6 || 20.7.2 || 20.7.1 || 20.5.1 || 20.6.2 || 19.3.0 || 20.6.1 || 17.2.4 || 18.2.0 || 18.4.6 || 19.1.0 || 19.2.4 || 19.2.929 || 18.3.8 || 18.4.303 || 18.3.7 || 18.4.1 || 19.2.097 || 19.2.0 || 19.2.099 || 18.3.6 || 20.4.2 || 19.0.0 || 20.9.1 || 20.3.5 || 20.3.1 || 18.3.5 || 20.6.3 || 18.4.3 || 18.4.4 || 18.3.3 || 17.2.8 || 20.8.1 || 19.2.32 || 19.2.2 || 17.2.5 || 18.4.0 || 20.4.1.1 || 20.1.3 || 20.1.2 || 17.2.10 || 19.2.098 || 20.1.1 || 17.2.6 || 19.2.1 || 18.3.4 || 20.4.1 || 17.2.9 || 19.2.31 || 19.0.1a || 18.3.0 || 17.2.7 || 18.4.5 || 20.3.4 || 20.3.3 || 20.4.1.2 || 20.3.2 || 18.3.1 || 20.1.12 || 19.2.3 || 20.10.1 || 20.6.5 || 20.3.7 || 20.9.3 || 20.11.1 || 20.6.3.2 || 20.4.2.3 || 20.3.5.1 || 20.3.4.3 || 20.9.3.1 || 20.6.4.1 || 20.3.3.2 || 20.6.5.2 || 20.3.7.1 || 20.11.1.1 || 20.10.1.1 || 20.6.1.2 || 20.1.3.1 || 20.9.2.2 || 20.6.5.3 || 20.6.3.3 || 20.3.7.2 || 20.6.5.4 || 20.9.2.3 || 20.9.4 || 20.12.1 || 20.3.8 || 20.6.6 || 20.12.2 || 20.13.1 || 20.9.5 || 20.12.3 || 20.6.7 || 20.9.5.1 || 20.14.1 || 20.12.3.1 || 20.12.4 || 20.15.1 || 20.9.6 || 20.6.8 || 20.16.1 || 20.9.5.3 || 20.12.4.1 || 20.15.2 || 20.12.5 || 20.9.7 || 20.15.3 || 20.12.5.1 || 20.12.5.2 || 20.15.4 || 20.9.7.1 || 20.18.1 || 20.12.6 || 20.9.8 || 20.15.4.1 || 20.18.2 || 26.1.1 || 20.15.4.2 || 20.18.2.1 || 20.12.5.3 || 20.12.6.1 || 20.9.8.2 || 20.15.5 || 20.18.3 || 20.12.7 || 20.9.9 || 20.18.2.2 || 20.12.5.4 || 20.12.7.1 || 20.15.5.1 || 20.15.4.3 || 20.12.6.2 || 20.15.5.2 || 20.15.4.4 || 26.1.1.1 || 20.9.9.1 || 20.18.3.1 || 26.1.1.2 || 20.15.4.5 || 20.15.5.3 || 20.12.7.2 || 20.9.9.2 || 20.15.6 | Not reported |
| Cisco/Cisco Catalyst SD-WAN Managergeneric | 20.1.12 || 19.2.1 || 18.4.4 || 18.4.5 || 20.1.1.1 || 20.1.1 || 19.3.0 || 19.2.2 || 19.2.099 || 18.3.6 || 18.3.7 || 19.2.0 || 18.3.8 || 19.0.0 || 19.1.0 || 18.4.302 || 18.4.303 || 19.2.097 || 19.2.098 || 17.2.10 || 18.3.6.1 || 19.0.1a || 18.2.0 || 18.4.3 || 18.4.1 || 17.2.8 || 18.3.3.1 || 18.4.0 || 18.3.1 || 17.2.6 || 17.2.9 || 18.3.4 || 17.2.5 || 18.3.1.1 || 18.3.5 || 18.4.0.1 || 18.3.3 || 17.2.7 || 17.2.4 || 18.3.0 || 19.2.3 || 18.4.501_ES || 20.3.1 || 20.1.2 || 19.2.929 || 19.2.31 || 20.3.2 || 19.2.32 || 20.3.2_925 || 20.3.2.1 || 20.3.2.1_927 || 18.4.6 || 20.1.2_937 || 20.4.1 || 20.3.2_928 || 20.3.2_929 || 20.4.1.0.1 || 20.3.2.1_930 || 19.2.4 || 20.5.0.1.1 || 20.4.1.1 || 20.3.3 || 19.2.4.0.1 || 20.3.2_937 || 20.3.3.1 || 20.5.1 || 20.1.3 || 20.3.3.0.4 || 20.3.3.1.2 || 20.3.3.1.1 || 20.4.1.2 || 20.3.3.0.2 || 20.4.1.1.5 || 20.4.1.0.01 || 20.4.1.0.02 || 20.3.3.1.7 || 20.3.3.1.5 || 20.5.1.0.1 || 20.3.3.1.10 || 20.3.3.0.8 || 20.4.2 || 20.4.2.0.1 || 20.3.4 || 20.3.3.0.14 || 19.2.4.0.8 || 19.2.4.0.9 || 20.3.4.0.1 || 20.3.2.0.5 || 20.6.1 || 20.5.1.0.2 || 20.3.3.0.17 || 20.6.1.1 || 20.6.0.18.3 || 20.3.2.0.6 || 20.6.0.18.4 || 20.4.2.0.2 || 20.3.3.0.16 || 20.3.4.0.5 || 20.6.1.0.1 || 20.3.4.0.6 || 20.6.2 || 20.7.1EFT2 || 20.3.4.0.9 || 20.3.4.0.11 || 20.4.2.0.4 || 20.3.3.0.18 || 20.7.1 || 20.6.2.1 || 20.3.4.1 || 20.5.1.1 || 20.4.2.1 || 20.4.2.1.1 || 20.3.4.1.1 || 20.3.813 || 20.3.4.0.19 || 20.4.2.2.1 || 20.5.1.2 || 20.3.4.2 || 20.3.814 || 20.4.2.2 || 20.6.2.2 || 20.3.4.2.1 || 20.7.1.1 || 20.3.4.1.2 || 20.6.2.2.2 || 20.3.4.0.20 || 20.6.2.2.3 || 20.4.2.2.2 || 20.3.5 || 20.6.2.0.4 || 20.4.2.2.3 || 20.3.4.0.24 || 20.6.2.2.7 || 20.6.3 || 20.3.4.2.2 || 20.4.2.2.4 || 20.7.1.0.2 || 20.8.1 || 20.3.5.0.8 || 20.3.5.0.9 || 20.4.2.2.8 || 20.3.5.0.7 || 20.6.3.0.7 || 20.6.3.0.5 || 20.6.3.0.10 || 20.6.3.0.2 || 20.7.2 || 20.9.1EFT2 || 20.6.3.0.11 || 20.6.3.1 || 20.6.3.0.14 || 20.6.4 || 20.9.1 || 20.6.3.0.19 || 20.6.3.0.18 || 20.3.6 || 20.9.1.1 || 20.6.3.0.23 || 20.6.4.0.4 || 20.6.3.0.25 || 20.6.5 || 20.6.3.0.27 || 20.9.2 || 20.9.2.1 || 20.6.3.0.29 || 20.6.3.0.31 || 20.6.3.0.32 || 20.10.1 || 20.6.3.0.33 || 20.9.2.0.01 || 20.9.1_LI_Images || 20.10.1_LI_Images || 20.9.2_LI_Images || 20.3.7 || 20.9.3 || 20.6.5.1 || 20.11.1 || 20.11.1_LI_Images || 20.9.3_LI_ Images || 20.6.3.1.1 || 20.9.3.0.2 || 20.6.5.1.2 || 20.9.3.0.3 || 20.4.2.3 || 20.6.3.2 || 20.6.4.1 || 20.6.3.0.38 || 20.6.3.0.39 || 20.3.5.1 || 20.3.4.3 || 20.9.3.1 || 20.3.3.2 || 20.6.5.2 || 20.3.7.1 || 20.10.1.1 || 20.6.5.2.1 || 20.3.4.0.25 || 20.6.2.2.4 || 20.6.1.2 || 20.11.1.1 || 20.9.3.0.5 || 20.3.4.0.26 || 20.6.5.1.3 || 20.6.3.0.40 || 20.1.3.1 || 20.9.2.2 || 20.6.5.2.3 || 20.6.5.1.4 || 20.6.5.3 || 20.6.3.0.41 || 20.9.3.0.7 || 20.6.5.1.5 || 20.9.3.0.4 || 20.6.4.0.19 || 20.6.5.1.6 || 20.9.3.0.8 || 20.6.3.3 || 20.3.7.2 || 20.6.5.4 || 20.6.5.1.7 || 20.9.3.0.12 || 20.6.4.2 || 20.6.5.5 || 20.9.3.2 || 20.11.1.2 || 20.6.3.4 || 20.10.1.2 || 20.6.5.1.9 || 20.9.3.0.16 || 20.6.3.0.45 || 20.6.5.1.10 || 20.9.3.0.17 || 20.6.5.2.4 || 20.6.4.0.21 || 20.9.3.0.18 || 20.6.3.0.46 || 20.6.3.0.47 || 20.9.2.3 || 20.9.3.2_LI_Images || 20.9.3.0.21 || 20.9.3.0.20 || 20.9.4_LI_Images || 20.9.4 || 20.6.5.1.11 || 20.12.1 || 20.12.1_LI_Images || 20.6.5.1.13 || 20.9.3.0.23 || 20.6.5.2.8 || 20.9.4.1 || 20.9.4.1_LI_Images || 20.9.3.0.25 || 20.9.3.0.24 || 20.6.5.1.14 || 20.3.8 || 20.6.6 || 20.9.3.0.26 || 20.6.3.0.51 || 20.9.3.0.29 || 20.12.2 || 20.12.2_LI_Images || 20.6.6.0.1 || 20.13.1_LI_Images || 20.9.4.0.4 || 20.13.1 || 20.9.4.1.1 || 20.9.5 || 20.9.5_LI_Images || 20.12.3_LI_Images || 20.12.3 || 20.9.4.1.3 || 20.6.7 || 20.9.5.1 || 20.9.5.1_LI_Images || 20.9.4.1.6 || 20.14.1 || 20.14.1_LI_Images || 20.9.5.2 || 20.9.5.2.1 || 20.9.5.2_LI_Images || 20.12.3.1 || 20.12.4 || 20.15.1_LI_Images || 20.15.1 || 20.9.5.1.4 || 20.9.5.2.7 || 20.9.5.2.13 || 20.9.6 || 20.9.6_LI_Images || 20.9.5.2.14 || 20.6.8 || 20.12.4.0.03 || 20.16.1 || 20.16.1_LI_Images || 20.12.4_LI_Images || 20.9.5.2.16 || 20.12.4.0.4 || 20.12.401 || 20.9.5.3 || 20.9.5.3_LI_Images || 20.12.4.1_LI_Images || 20.12.4.1 || 20.9.5.2.21 || 20.9.6.0.3 || 20.12.4.0.6 || 20.15.2_LI_Images || 20.15.2 || 20.12.4_Monthly_ES5 || 20.12.5 || 20.12.5_LI_Images || 20.9.7_LI _Images || 20.9.7 || 20.15.3 || 20.15.3_ LI _Images || 20.12.501 || 20.12.5.1_LI_Images || 20.12.5.1 || 20.12.5.2_LI_Images || 20.12.5.2 || 20.15.3.1 || 20.15.4_LI_Images || 20.15.4 || 20.9.7.1_LI _Images || 20.9.7.1 || 20.18.1 || 20.18.1_LI_Images || 20.12.6_LI_Images || 20.12.6 || 20.12.5.1.01 || 26.0.1 || 20.9.8 || 20.9.8_LI_Images || 20.18.2 || 20.15.4.1_LI_Images || 20.15.4.1 || 20.18.2_LI_Images || 26.1.1 || 26.1.1_LI_Images || 20.18.2.1_LI_Images || 20.18.2.1 || 20.15.4.2_LI_Images || 20.15.4.2 || 20.12.6.1 || 20.12.6.1_LI_Images || 20.12.5.3 || 20.12.5.3_LI_Images || 20.9.8.2_LI_Images || 20.9.8.2 || 20.18.3 || 20.18.3_LI_Images || 20.15.5 || 20.15.5_LI_Images || 20.12.7 || 20.12.7_LI_Images || 20.9.9 || 20.9.9_LI_Images || 20.18.2.2 || 20.18.2.2_LI_Images || 20.12.5.4 || 20.12.5.4_LI_ Images || 20.12.7.1_LI_Images || 20.12.6.2_LI_Images || 20.12.7.1 || 20.15.5.1 || 20.15.4.3 || 20.15.4.3_LI_Images || 20.15.5.1_LI_Images || 20.12.6.2 || 20.15.5.2 || 20.15.5.2_LI_Images || 26.1.1.1_LI_Images || 20.15.4.4 || 20.15.4.4_LI_Images || 26.1.1.1 || 20.9.9.1_LI_Images || 20.9.9.1 || 20.18.3.1_LI_Images || 20.18.3.1 || 26.1.1.2 || 26.1.1.2_LI_Images || 20.15.4.5 || 20.15.4.5_LI_Images || 20.15.5.3 || 20.15.5.3_LI_Images || 20.12.7.2_LI_Images || 20.12.7.2 || 20.9.9.2 || 20.9.9.2_LI_Images || 20.15.6 || 20.15.6_LI_Images | Not reported |
Published upstream
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Catalyst SD-WAN engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20303 are related to improper input validation issues that are grouped under the Common Weakness Enumeration (CWE) CWE-20.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-20303 records a Critical severity (CVSS 9.9) vulnerability in Cisco Catalyst SD-WAN Security Hardening Release - Input Validation Vulnerabilities. The current sources do not mark it as known exploited. The current feed maps Cisco/Cisco Catalyst SD-WAN Controller (generic), Cisco/Cisco Catalyst SD-WAN Manager (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Cisco/Cisco Catalyst SD-WAN Controller (generic), Cisco/Cisco Catalyst SD-WAN Manager (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Cisco/Cisco Catalyst SD-WAN Controllergeneric | 20.6.4 || 20.9.2 || 20.3.6 || 20.7.2 || 20.7.1 || 20.5.1 || 20.6.2 || 19.3.0 || 20.6.1 || 17.2.4 || 18.2.0 || 18.4.6 || 19.1.0 || 19.2.4 || 19.2.929 || 18.3.8 || 18.4.303 || 18.3.7 || 18.4.1 || 19.2.097 || 19.2.0 || 19.2.099 || 18.3.6 || 20.4.2 || 19.0.0 || 20.9.1 || 20.3.5 || 20.3.1 || 18.3.5 || 20.6.3 || 18.4.3 || 18.4.4 || 18.3.3 || 17.2.8 || 20.8.1 || 19.2.32 || 19.2.2 || 17.2.5 || 18.4.0 || 20.4.1.1 || 20.1.3 || 20.1.2 || 17.2.10 || 19.2.098 || 20.1.1 || 17.2.6 || 19.2.1 || 18.3.4 || 20.4.1 || 17.2.9 || 19.2.31 || 19.0.1a || 18.3.0 || 17.2.7 || 18.4.5 || 20.3.4 || 20.3.3 || 20.4.1.2 || 20.3.2 || 18.3.1 || 20.1.12 || 19.2.3 || 20.10.1 || 20.6.5 || 20.3.7 || 20.9.3 || 20.11.1 || 20.6.3.2 || 20.4.2.3 || 20.3.5.1 || 20.3.4.3 || 20.9.3.1 || 20.6.4.1 || 20.3.3.2 || 20.6.5.2 || 20.3.7.1 || 20.11.1.1 || 20.10.1.1 || 20.6.1.2 || 20.1.3.1 || 20.9.2.2 || 20.6.5.3 || 20.6.3.3 || 20.3.7.2 || 20.6.5.4 || 20.9.2.3 || 20.9.4 || 20.12.1 || 20.3.8 || 20.6.6 || 20.12.2 || 20.13.1 || 20.9.5 || 20.12.3 || 20.6.7 || 20.9.5.1 || 20.14.1 || 20.12.3.1 || 20.12.4 || 20.15.1 || 20.9.6 || 20.6.8 || 20.16.1 || 20.9.5.3 || 20.12.4.1 || 20.15.2 || 20.12.5 || 20.9.7 || 20.15.3 || 20.12.5.1 || 20.12.5.2 || 20.15.4 || 20.9.7.1 || 20.18.1 || 20.12.6 || 20.9.8 || 20.15.4.1 || 20.18.2 || 26.1.1 || 20.15.4.2 || 20.18.2.1 || 20.12.5.3 || 20.12.6.1 || 20.9.8.2 || 20.15.5 || 20.18.3 || 20.12.7 || 20.9.9 || 20.18.2.2 || 20.12.5.4 || 20.12.7.1 || 20.15.5.1 || 20.15.4.3 || 20.12.6.2 || 20.15.5.2 || 20.15.4.4 || 26.1.1.1 || 20.9.9.1 || 20.18.3.1 || 26.1.1.2 || 20.15.4.5 || 20.15.5.3 || 20.12.7.2 || 20.9.9.2 || 20.15.6 | Not reported |
| Cisco/Cisco Catalyst SD-WAN Managergeneric | 20.1.12 || 19.2.1 || 18.4.4 || 18.4.5 || 20.1.1.1 || 20.1.1 || 19.3.0 || 19.2.2 || 19.2.099 || 18.3.6 || 18.3.7 || 19.2.0 || 18.3.8 || 19.0.0 || 19.1.0 || 18.4.302 || 18.4.303 || 19.2.097 || 19.2.098 || 17.2.10 || 18.3.6.1 || 19.0.1a || 18.2.0 || 18.4.3 || 18.4.1 || 17.2.8 || 18.3.3.1 || 18.4.0 || 18.3.1 || 17.2.6 || 17.2.9 || 18.3.4 || 17.2.5 || 18.3.1.1 || 18.3.5 || 18.4.0.1 || 18.3.3 || 17.2.7 || 17.2.4 || 18.3.0 || 19.2.3 || 18.4.501_ES || 20.3.1 || 20.1.2 || 19.2.929 || 19.2.31 || 20.3.2 || 19.2.32 || 20.3.2_925 || 20.3.2.1 || 20.3.2.1_927 || 18.4.6 || 20.1.2_937 || 20.4.1 || 20.3.2_928 || 20.3.2_929 || 20.4.1.0.1 || 20.3.2.1_930 || 19.2.4 || 20.5.0.1.1 || 20.4.1.1 || 20.3.3 || 19.2.4.0.1 || 20.3.2_937 || 20.3.3.1 || 20.5.1 || 20.1.3 || 20.3.3.0.4 || 20.3.3.1.2 || 20.3.3.1.1 || 20.4.1.2 || 20.3.3.0.2 || 20.4.1.1.5 || 20.4.1.0.01 || 20.4.1.0.02 || 20.3.3.1.7 || 20.3.3.1.5 || 20.5.1.0.1 || 20.3.3.1.10 || 20.3.3.0.8 || 20.4.2 || 20.4.2.0.1 || 20.3.4 || 20.3.3.0.14 || 19.2.4.0.8 || 19.2.4.0.9 || 20.3.4.0.1 || 20.3.2.0.5 || 20.6.1 || 20.5.1.0.2 || 20.3.3.0.17 || 20.6.1.1 || 20.6.0.18.3 || 20.3.2.0.6 || 20.6.0.18.4 || 20.4.2.0.2 || 20.3.3.0.16 || 20.3.4.0.5 || 20.6.1.0.1 || 20.3.4.0.6 || 20.6.2 || 20.7.1EFT2 || 20.3.4.0.9 || 20.3.4.0.11 || 20.4.2.0.4 || 20.3.3.0.18 || 20.7.1 || 20.6.2.1 || 20.3.4.1 || 20.5.1.1 || 20.4.2.1 || 20.4.2.1.1 || 20.3.4.1.1 || 20.3.813 || 20.3.4.0.19 || 20.4.2.2.1 || 20.5.1.2 || 20.3.4.2 || 20.3.814 || 20.4.2.2 || 20.6.2.2 || 20.3.4.2.1 || 20.7.1.1 || 20.3.4.1.2 || 20.6.2.2.2 || 20.3.4.0.20 || 20.6.2.2.3 || 20.4.2.2.2 || 20.3.5 || 20.6.2.0.4 || 20.4.2.2.3 || 20.3.4.0.24 || 20.6.2.2.7 || 20.6.3 || 20.3.4.2.2 || 20.4.2.2.4 || 20.7.1.0.2 || 20.8.1 || 20.3.5.0.8 || 20.3.5.0.9 || 20.4.2.2.8 || 20.3.5.0.7 || 20.6.3.0.7 || 20.6.3.0.5 || 20.6.3.0.10 || 20.6.3.0.2 || 20.7.2 || 20.9.1EFT2 || 20.6.3.0.11 || 20.6.3.1 || 20.6.3.0.14 || 20.6.4 || 20.9.1 || 20.6.3.0.19 || 20.6.3.0.18 || 20.3.6 || 20.9.1.1 || 20.6.3.0.23 || 20.6.4.0.4 || 20.6.3.0.25 || 20.6.5 || 20.6.3.0.27 || 20.9.2 || 20.9.2.1 || 20.6.3.0.29 || 20.6.3.0.31 || 20.6.3.0.32 || 20.10.1 || 20.6.3.0.33 || 20.9.2.0.01 || 20.9.1_LI_Images || 20.10.1_LI_Images || 20.9.2_LI_Images || 20.3.7 || 20.9.3 || 20.6.5.1 || 20.11.1 || 20.11.1_LI_Images || 20.9.3_LI_ Images || 20.6.3.1.1 || 20.9.3.0.2 || 20.6.5.1.2 || 20.9.3.0.3 || 20.4.2.3 || 20.6.3.2 || 20.6.4.1 || 20.6.3.0.38 || 20.6.3.0.39 || 20.3.5.1 || 20.3.4.3 || 20.9.3.1 || 20.3.3.2 || 20.6.5.2 || 20.3.7.1 || 20.10.1.1 || 20.6.5.2.1 || 20.3.4.0.25 || 20.6.2.2.4 || 20.6.1.2 || 20.11.1.1 || 20.9.3.0.5 || 20.3.4.0.26 || 20.6.5.1.3 || 20.6.3.0.40 || 20.1.3.1 || 20.9.2.2 || 20.6.5.2.3 || 20.6.5.1.4 || 20.6.5.3 || 20.6.3.0.41 || 20.9.3.0.7 || 20.6.5.1.5 || 20.9.3.0.4 || 20.6.4.0.19 || 20.6.5.1.6 || 20.9.3.0.8 || 20.6.3.3 || 20.3.7.2 || 20.6.5.4 || 20.6.5.1.7 || 20.9.3.0.12 || 20.6.4.2 || 20.6.5.5 || 20.9.3.2 || 20.11.1.2 || 20.6.3.4 || 20.10.1.2 || 20.6.5.1.9 || 20.9.3.0.16 || 20.6.3.0.45 || 20.6.5.1.10 || 20.9.3.0.17 || 20.6.5.2.4 || 20.6.4.0.21 || 20.9.3.0.18 || 20.6.3.0.46 || 20.6.3.0.47 || 20.9.2.3 || 20.9.3.2_LI_Images || 20.9.3.0.21 || 20.9.3.0.20 || 20.9.4_LI_Images || 20.9.4 || 20.6.5.1.11 || 20.12.1 || 20.12.1_LI_Images || 20.6.5.1.13 || 20.9.3.0.23 || 20.6.5.2.8 || 20.9.4.1 || 20.9.4.1_LI_Images || 20.9.3.0.25 || 20.9.3.0.24 || 20.6.5.1.14 || 20.3.8 || 20.6.6 || 20.9.3.0.26 || 20.6.3.0.51 || 20.9.3.0.29 || 20.12.2 || 20.12.2_LI_Images || 20.6.6.0.1 || 20.13.1_LI_Images || 20.9.4.0.4 || 20.13.1 || 20.9.4.1.1 || 20.9.5 || 20.9.5_LI_Images || 20.12.3_LI_Images || 20.12.3 || 20.9.4.1.3 || 20.6.7 || 20.9.5.1 || 20.9.5.1_LI_Images || 20.9.4.1.6 || 20.14.1 || 20.14.1_LI_Images || 20.9.5.2 || 20.9.5.2.1 || 20.9.5.2_LI_Images || 20.12.3.1 || 20.12.4 || 20.15.1_LI_Images || 20.15.1 || 20.9.5.1.4 || 20.9.5.2.7 || 20.9.5.2.13 || 20.9.6 || 20.9.6_LI_Images || 20.9.5.2.14 || 20.6.8 || 20.12.4.0.03 || 20.16.1 || 20.16.1_LI_Images || 20.12.4_LI_Images || 20.9.5.2.16 || 20.12.4.0.4 || 20.12.401 || 20.9.5.3 || 20.9.5.3_LI_Images || 20.12.4.1_LI_Images || 20.12.4.1 || 20.9.5.2.21 || 20.9.6.0.3 || 20.12.4.0.6 || 20.15.2_LI_Images || 20.15.2 || 20.12.4_Monthly_ES5 || 20.12.5 || 20.12.5_LI_Images || 20.9.7_LI _Images || 20.9.7 || 20.15.3 || 20.15.3_ LI _Images || 20.12.501 || 20.12.5.1_LI_Images || 20.12.5.1 || 20.12.5.2_LI_Images || 20.12.5.2 || 20.15.3.1 || 20.15.4_LI_Images || 20.15.4 || 20.9.7.1_LI _Images || 20.9.7.1 || 20.18.1 || 20.18.1_LI_Images || 20.12.6_LI_Images || 20.12.6 || 20.12.5.1.01 || 26.0.1 || 20.9.8 || 20.9.8_LI_Images || 20.18.2 || 20.15.4.1_LI_Images || 20.15.4.1 || 20.18.2_LI_Images || 26.1.1 || 26.1.1_LI_Images || 20.18.2.1_LI_Images || 20.18.2.1 || 20.15.4.2_LI_Images || 20.15.4.2 || 20.12.6.1 || 20.12.6.1_LI_Images || 20.12.5.3 || 20.12.5.3_LI_Images || 20.9.8.2_LI_Images || 20.9.8.2 || 20.18.3 || 20.18.3_LI_Images || 20.15.5 || 20.15.5_LI_Images || 20.12.7 || 20.12.7_LI_Images || 20.9.9 || 20.9.9_LI_Images || 20.18.2.2 || 20.18.2.2_LI_Images || 20.12.5.4 || 20.12.5.4_LI_ Images || 20.12.7.1_LI_Images || 20.12.6.2_LI_Images || 20.12.7.1 || 20.15.5.1 || 20.15.4.3 || 20.15.4.3_LI_Images || 20.15.5.1_LI_Images || 20.12.6.2 || 20.15.5.2 || 20.15.5.2_LI_Images || 26.1.1.1_LI_Images || 20.15.4.4 || 20.15.4.4_LI_Images || 26.1.1.1 || 20.9.9.1_LI_Images || 20.9.9.1 || 20.18.3.1_LI_Images || 20.18.3.1 || 26.1.1.2 || 26.1.1.2_LI_Images || 20.15.4.5 || 20.15.4.5_LI_Images || 20.15.5.3 || 20.15.5.3_LI_Images || 20.12.7.2_LI_Images || 20.12.7.2 || 20.9.9.2 || 20.9.9.2_LI_Images || 20.15.6 || 20.15.6_LI_Images | Not reported |
Published upstream
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Catalyst SD-WAN engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20303 are related to improper input validation issues that are grouped under the Common Weakness Enumeration (CWE) CWE-20.
Quoted source text, attributed separately from HOL analysis.