CVE-2021-31755
Out-of-bounds Write — is CVE-2021-31755real, exploitable, or a false positive? Here's the community ground truth.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
References
Published
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Community ground truth
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In line with its CVSS base score.
Field notes & remediation
Verdicts are the quick signal — notes are the evidence and fixes behind them.
- 0
Tenda AC11 Router Stack Buffer Overflow Vulnerability — Tenda AC11 devices contain a stack buffer overflow vulnerability in /goform/setmac which allows attackers to execute code via a crafted post request. Listed in the CISA KEV catalog (added 2021-11-03) — confirmed exploited in the wild, not theoretical. FIRST EPSS puts the chance of exploitation in the next 30 days at ~86%. Treat it as real and prioritize remediation over triage.
- 0
Required action for Tenda AC11 Router: Apply updates per vendor instructions. CISA set a federal remediation due date of 2021-11-17. After patching, verify the vulnerable path is no longer reachable before closing the finding.
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