CVE-2026-4565

7.4 highEPSS 1.0%

A vulnerability was detected in Tenda AC21 16.03.08.16. Impacted is the function formSetQosBand of the file /goform/SetNetControlList. Performing a manipulation of the argument list results in buffer overflow. The attack can be initiated remotely. The exploit is now public and may be used.

Severity

CVSS 4.0

7.4 high

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

CVSS 3.1

8.8 high

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 1.0% chance of exploitation in the next 30 days; higher than 61% of CVEs (scores of 2026-10-31)
CWEs: CWE-119, CWE-120
Published: 2026-03-23
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

tenda:ac21_firmware

References

https://github.com/hellonestor/killallbug/issues/14
https://github.com/hellonestor/killallbug/releases/tag/poc
https://vuldb.com/?ctiid.352402
https://vuldb.com/?id.352402
https://vuldb.com/?submit.775119

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