CVE-2026-1637

7.4 highEPSS 0.7%

High (7.4) in tenda ac21 firmware. EPSS 0.7% chance of exploitation in the next 30 days.

A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function fromAdvSetMacMtuWan of the file /goform/AdvSetMacMtuWan. The manipulation leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might 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: 0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-31)
CWEs: CWE-119, CWE-121
Published: 2026-01-29
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

tenda:ac21_firmware

References

https://github.com/LX-LX88/cve/issues/25
https://vuldb.com/?ctiid.343416
https://vuldb.com/?id.343416
https://vuldb.com/?submit.740865
https://www.tenda.com.cn/

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