← Global Threat Landscape
CVE-2021-20090
CWE-22
Critical
103.8
RPSRPS range: 0–105; KEV-listed vulnerabilities can receive an exploitation amplifier.
Description
A 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.
Source: NVD
Signals
- CVSS
- 9.8
- Critical · v3.1
- EPSS
- 99.98%
- Probability of exploitation in the next 30 days (FIRST)
- CISA KEV
- In CISA KEV since Nov 2021
- Fix commit
- No known fix commit
- Sources: MoreFixes, FreshFixes
- Weakness
- CWE-22
- Published
- 29 Apr 2021
- Last modified 3 Nov 2025
How to read these signals: RPS · EPSS · CISA KEV · Data sources
Get this score from the API
curl -H "Authorization: Bearer dsec_live_xxxxxxxx" \
https://api.intelligence.devsecure.io/api/v1/rps/CVE-2021-20090Replace the placeholder with your key. Get a free API key or rank your own CVEs.
Data as of 8 Oct 2026, 05:16 UK time