What is CVE-2025-25343?

CVE-2025-25343 is a critical-severity vulnerability in Tenda Ac6, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2025-02-12.

How severe is CVE-2025-25343?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Tenda Ac6

CVE-2025-25343

Tenda AC6 V15.03.05.16 firmware has a buffer overflow vulnerability in the formexeCommand function.

Vulnerability class: Buffer Overflow

Published 2025-02-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (51.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000

Affected products

Tenda Ac6
Tenda Ac6 Firmware — versions 15.03.05.16

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

github.com/wy876/cve/issues/4 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-25343?: CVE-2025-25343 is a critical-severity vulnerability in Tenda Ac6, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2025-02-12.
How severe is CVE-2025-25343?: Critical severity. CVSS v3 base score is 9.8 out of 10.