Tenda AC11 Router
YES - ON THE CISA KEV LIST
CVE-2021-31755
Tenda AC11 Router Stack Buffer Overflow Vulnerability
overdue since 2021-11-17
Tenda: 3 entries (0.2% of all KEV entries are from this vendor); 0 added in 2026.
BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.
Your BOD 26-04 window (SSVC tier helper)
Your remediation window ends:
Description
Tenda AC11 devices contain a stack buffer overflow vulnerability in /goform/setmac which allows attackers to execute code via a crafted post request.
Required action (CISA)
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2021-31755
References
Other KEV entries for this vendor: Tenda
- CVE-2020-10987 - AC1900 Router AC15 Model (2021-11-03)
- CVE-2018-14558 - AC7, AC9, and AC10 Routers (2021-11-03)
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