CVE-2021-31755 (Tenda AC11 Router) is in the CISA Known Exploited Vulnerabilities catalog since 2021-11-03. Tenda AC11 devices contain a stack buffer overflow vulnerability in /goform/setmac which allows attackers to… See the required fix, due date and advisories.
CVE-2021-31755 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 2021-11-03. Tenda AC11 devices contain a stack buffer overflow vulnerability in /goform/setmac which allows attackers to execute code via a crafted post request.
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Wording published by CISA for this catalog entry. It is the baseline action, not a decision about your environment: whether this exposure matters for you depends on where the affected component runs, what it is exposed to and who owns it.
A catalog entry tells you a vulnerability is being exploited somewhere. It does not tell you whether it matters in your estate, who owns the fix, or what evidence an auditor will ask for later. That is the work VulnTrek does: it takes findings from the tools you already run, decides which exposure actually matters, routes it to an owner, keeps remediation human-approved and retains the lineage as evidence.
Sourced from public upstream advisories (CISA KEV, ENISA EUVD, vendor PSIRTs) mirrored daily. Informational only — not a remediation decision, not legal advice, and the absence of a record is not evidence of safety.