CVE-2021-20091
An authenticated remote attacker could leverage this vulnerability to alter device configuration, potentially gaining remote code execution.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (8.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 do not properly sanitize user input. An authenticated remote attacker could leverage this vulnerability to alter device configuration, potentially gaining remote code execution.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 8.46% probability · 95th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- buffalo/wsr-2533dhpl2-bk firmware · buffalo/wsr-2533dhp3-bk firmware
- Source
- vulnreport@tenable.com
EPSS 8.5% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://www.tenable.com/security/research/tra-2021-13Third Party Advisory
- https://www.tenable.com/security/research/tra-2021-13Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.