What is CVE-2025-25668?

CVE-2025-25668 is a critical-severity vulnerability in Tenda Ac8, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2025-02-20.

How severe is CVE-2025-25668?

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

Buffer overflow in Tenda Ac8

CVE-2025-25668

Tenda AC8V4 V16.03.34.06 was discovered to contain a stack overflow via the shareSpeed parameter in the sub_47D878 function.

Vulnerability class: Buffer Overflow

Published 2025-02-20 · 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: 0.006 (45.1th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Tenda Ac8 — versions v4
Tenda Ac8 Firmware — versions 16.03.34.06

Weakness classification (CWE)

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

References

github.com/jangfan/my-vuln/blob/main/Tenda/AC8V4/setMacFilterCfg.md (Exploit, Third Party Advisory, Broken Link)

Frequently asked questions

What is CVE-2025-25668?: CVE-2025-25668 is a critical-severity vulnerability in Tenda Ac8, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2025-02-20.
How severe is CVE-2025-25668?: Critical severity. CVSS v3 base score is 9.8 out of 10.