CVE-2021-20731
HIGHCVSS 8.8/10EPSS 0.59%
Last modified
CVE-2021-20731 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 0.59% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Buffalo | Wsr-1166dhp4 Firmware | <= 1.02 |
| Buffalo | Wsr-1166dhp3 Firmware | <= 1.16 |
References
- https://jvn.jp/en/vu/JVNVU92862829/index.htmlThird Party Advisory
- https://www.buffalo.jp/news/detail/20210531-01.htmlVendor Advisory
- https://jvn.jp/en/vu/JVNVU92862829/index.htmlThird Party Advisory
- https://www.buffalo.jp/news/detail/20210531-01.htmlVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-20731?
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.
How severe is CVE-2021-20731?
CVE-2021-20731 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.59% probability of exploitation in the next 30 days.
How do I fix CVE-2021-20731?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-20731?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST