VulnerabilityAnalyzed
CVE-2021-31755
Tenda AC11 Router Stack Buffer Overflow Vulnerability
KEVCRITICAL 9.8EPSS 86.9%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 17 November 2021). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /goform/setmac allows attackers to execute arbitrary code on the system via a crafted post request.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 86.89% probability · 100th percentile
- CISA KEV
- Listed 3 November 2021 · due 17 November 2021
- Weakness
- CWE-787
- Affected
- tenda/ac11 firmware
- Source
- cve@mitre.org
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2021-31755
References
- https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3Broken Link, Exploit, Issue Tracking, Third Party Advisory
- https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3Broken Link, Exploit, Issue Tracking, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31755US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.