OS command injection in BUFFALO INC. WSR-1166DHP3 and WSR-1166DHP4
Priority LOW 39CWE-78Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-78.
Summary
WSR-1166DHP3 firmware Ver.1.16 and prior and WSR-1166DHP4 firmware Ver.1.02 and prior allow an attacker to execute arbitrary OS commands with root privileges via unspecified vectors.
Why it matters now
EPSS 0.00593 48th 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 INC. | WSR-1166DHP3 and WSR-1166DHP4 | WSR-1166DHP3 firmware Ver.1.16 and prior and WSR-1166DHP4 firmware Ver.1.02 and prior | — | No fix listed | CNA |
- WSR-1166DHP3 and WSR-1166DHP4 VendorBUFFALO INC. Affected WSR-1166DHP3 firmware Ver.1.16 and prior and WSR-1166DHP4 firmware Ver.1.02 and prior Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:buffalo:wsr-1166dhp4_firmware:*:*:*:*:*:*:*:* | up to 1.02 | Vulnerable | BUFFALO INC. |
| cpe:2.3:h:buffalo:wsr-1166dhp4:-:*:*:*:*:*:*:* | not specified by NVD | Running on | BUFFALO INC. |
| cpe:2.3:o:buffalo:wsr-1166dhp3_firmware:*:*:*:*:*:*:*:* | up to 1.16 | Vulnerable | BUFFALO INC. |
| cpe:2.3:h:buffalo:wsr-1166dhp3:-:*:*:*:*:*:*:* | not specified by NVD | Running on | BUFFALO INC. |
- cpe:2.3:o:buffalo:wsr-1166dhp4_firmware:*:*:*:*:*:*:*:* Versions up to 1.02 Vulnerable ·BUFFALO INC.
- cpe:2.3:h:buffalo:wsr-1166dhp4:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·BUFFALO INC.
- cpe:2.3:o:buffalo:wsr-1166dhp3_firmware:*:*:*:*:*:*:*:* Versions up to 1.16 Vulnerable ·BUFFALO INC.
- cpe:2.3:h:buffalo:wsr-1166dhp3:-:*:*:*:*:*:*:* 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-2021-20731
- 2026-10-03 Alias added: GHSA-35wj-mf36-r4h7
References
More BUFFALO INC. Wsr-1166dhp3 Firmware vulnerabilities
- TI-2021-03956 Improper access control vulnerability in WSR-1166DHP3 firmware Ver.1.16 and prior and… CVSS 3.1MEDIUM 4.3
Sources
- CVE-2021-20731 · CVE Program
- CVE-2021-20731 · NVD
- FIRST EPSS
- GHSA-35wj-mf36-r4h7 · 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