Answer in brief
CVE-2026-33803 records a Medium severity (CVSS 6.5) vulnerability in Junos OS Evolved: A port which has been inadvertently exposed can be reached by an attacker. The current sources do not mark it as known exploited. The current feed maps Juniper Networks/Junos OS Evolved (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 6.5. 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 Juniper Networks/Junos OS Evolved (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Juniper Networks/Junos OS Evolvedgeneric | >=0 <23.2R2-S7-EVO || >=23.4 <23.4R2-S8-EVO || >=24.2 <24.2R2-S5-EVO || >=24.4 <24.4R2-S4-EVO || >=25.2 <25.2R2-S1-EVO || >=25.4 <25.4R1-S2-EVO | 23.2R2-S7-EVO, 23.4R2-S8-EVO, 24.2R2-S5-EVO, 24.4R2-S4-EVO, 25.2R2-S1-EVO, 25.4R1-S2-EVO |
Published upstream
Jul 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 10, 2026
An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a limited information disclosure and availability impact to the device. Due to a wrong initialization, a process which should only be able to communicate internally within the device can be reached over the network via an open port. This leads to a device being inadvertently exposed and increased CPU cycles spent processing ingress packets. This issue affects Junos OS Evolved: * all versions before 23.2R2-S7-EVO, * 23.4 versions before 23.4R2-S8-EVO, * 24.2 versions before 24.2R2-S5-EVO, * 24.4 versions before 24.4R2-S4-EVO, * 25.2 versions before 25.2R2-S1-EVO, * 25.4 versions before 25.4R1-S2-EVO.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-33803 records a Medium severity (CVSS 6.5) vulnerability in Junos OS Evolved: A port which has been inadvertently exposed can be reached by an attacker. The current sources do not mark it as known exploited. The current feed maps Juniper Networks/Junos OS Evolved (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 6.5. 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 Juniper Networks/Junos OS Evolved (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Juniper Networks/Junos OS Evolvedgeneric | >=0 <23.2R2-S7-EVO || >=23.4 <23.4R2-S8-EVO || >=24.2 <24.2R2-S5-EVO || >=24.4 <24.4R2-S4-EVO || >=25.2 <25.2R2-S1-EVO || >=25.4 <25.4R1-S2-EVO | 23.2R2-S7-EVO, 23.4R2-S8-EVO, 24.2R2-S5-EVO, 24.4R2-S4-EVO, 25.2R2-S1-EVO, 25.4R1-S2-EVO |
Published upstream
Jul 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 10, 2026
An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a limited information disclosure and availability impact to the device. Due to a wrong initialization, a process which should only be able to communicate internally within the device can be reached over the network via an open port. This leads to a device being inadvertently exposed and increased CPU cycles spent processing ingress packets. This issue affects Junos OS Evolved: * all versions before 23.2R2-S7-EVO, * 23.4 versions before 23.4R2-S8-EVO, * 24.2 versions before 24.2R2-S5-EVO, * 24.4 versions before 24.4R2-S4-EVO, * 25.2 versions before 25.2R2-S1-EVO, * 25.4 versions before 25.4R1-S2-EVO.
Quoted source text, attributed separately from HOL analysis.