What is CVE-2025-25505?

CVE-2025-25505 is a medium-severity vulnerability in Tenda Ac6, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2025-02-21.

How severe is CVE-2025-25505?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2025-25505 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Tenda Ac6

CVE-2025-25505

Tenda AC6 15.03.05.16_multi is vulnerable to Buffer Overflow in the sub_452A4 function.

Vulnerability class: Buffer Overflow

Published 2025-02-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (20.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 20.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Tenda Ac6
Tenda Ac6 Firmware — versions 15.03.05.16_multi

Weakness classification (CWE)

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

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

github.com/faqiadegege/IoTVuln/blob/main/tendaAC6_getRootStatus_callback_overfl… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-25505?: CVE-2025-25505 is a medium-severity vulnerability in Tenda Ac6, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2025-02-21.
How severe is CVE-2025-25505?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2025-25505 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.