Tenda AC11 Router Stack Buffer Overflow Vulnerability (CVE-2021-31755)
Severity: critical · Patch status: patched · Since 2021-11-03 · CVE-2021-31755
Tenda AC11 devices contain a stack buffer overflow vulnerability in /goform/setmac which allows attackers to execute code via a crafted post request. CISA added CVE-2021-31755 to its Known Exploited Vulnerabilities catalog on Nov 3, 2021, which means attackers are exploiting it in the wild.
What to do
- Apply updates per vendor instructions.
- US federal agencies must remediate by Nov 17, 2021 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
