Answer in brief
CVE-2021-20090 records a High severity vulnerability in CVE Program Container. The current sources mark it as known exploited. The current feed maps n/a/Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. 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 n/a/Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3 (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| n/a/Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3generic | WSR-2533DHPL2 <=1.02, WSR-2533DHP3 <= 1.24 | Not reported |
Published upstream
Apr 29, 2021
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2025
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Nov 3, 2021
Evidence: source:kev:kev:kev:recordA path traversal vulnerability in the web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 could allow unauthenticated remote attackers to bypass authentication.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2021-20090 records a High severity vulnerability in CVE Program Container. The current sources mark it as known exploited. The current feed maps n/a/Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. 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 n/a/Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3 (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| n/a/Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3generic | WSR-2533DHPL2 <=1.02, WSR-2533DHP3 <= 1.24 | Not reported |
Published upstream
Apr 29, 2021
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2025
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Nov 3, 2021
Evidence: source:kev:kev:kev:recordA path traversal vulnerability in the web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 could allow unauthenticated remote attackers to bypass authentication.
Quoted source text, attributed separately from HOL analysis.