The web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3…
Priority MEDIUM 49Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.08458 95th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3 | WSR-2533DHPL2 <=1.02, WSR-2533DHP3 <= 1.24 | — | No fix listed | CNA |
- Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3 Vendor— Affected WSR-2533DHPL2 <=1.02, WSR-2533DHP3 <= 1.24 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:buffalo:wsr-2533dhpl2-bk_firmware:*:*:*:*:*:*:*:* | up to 1.02 | Vulnerable | BUFFALO INC. |
| cpe:2.3:h:buffalo:wsr-2533dhpl2-bk:-:*:*:*:*:*:*:* | not specified by NVD | Running on | BUFFALO INC. |
| cpe:2.3:o:buffalo:wsr-2533dhp3-bk_firmware:*:*:*:*:*:*:*:* | up to 1.24 | Vulnerable | BUFFALO INC. |
| cpe:2.3:h:buffalo:wsr-2533dhp3-bk:-:*:*:*:*:*:*:* | not specified by NVD | Running on | BUFFALO INC. |
- cpe:2.3:o:buffalo:wsr-2533dhpl2-bk_firmware:*:*:*:*:*:*:*:* Versions up to 1.02 Vulnerable ·BUFFALO INC.
- cpe:2.3:h:buffalo:wsr-2533dhpl2-bk:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·BUFFALO INC.
- cpe:2.3:o:buffalo:wsr-2533dhp3-bk_firmware:*:*:*:*:*:*:*:* Versions up to 1.24 Vulnerable ·BUFFALO INC.
- cpe:2.3:h:buffalo:wsr-2533dhp3-bk:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·BUFFALO INC.
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20091
- 2026-10-03 Alias added: GHSA-6rqh-8mhj-w4pr
- 2026-10-05 EPSS moved to the 90th–95th percentile
- 2026-10-23 EPSS moved to the 95th–99th percentile
- 2026-10-25 EPSS moved to the 90th–95th percentile
- 2026-10-30 EPSS moved to the 95th–99th percentile
References
More BUFFALO INC. Wsr-2533dhp3-bk Firmware vulnerabilities
- TI-2021-03393 Path traversal in Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3 KEVCVSS 3.1CRITICAL 9.8
- TI-2021-03395 Improper authentication in Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3 CVSS 3.1HIGH 7.5
Sources
- CVE-2021-20091 · CVE Program
- CVE-2021-20091 · NVD
- FIRST EPSS
- GHSA-6rqh-8mhj-w4pr · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences