Cyber Resilience

CVE-2025-57638

HighPublic PoC

Published: 23 September 2025

Published
23 September 2025
Modified
25 September 2025
KEV Added
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Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0012 30.0th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-57638 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Tenda Ac9 Firmware. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 30.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

Buffer overflow vulnerability in Tenda AC9 1.0 via the user supplied sys.vendor configuration value.

CWE(s)
CWE-122

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

Buffer overflow in the Tenda AC9 router's sys.vendor configuration parameter enables remote exploitation of a public-facing web application for initial access.

Affected Assets

tenda
ac9 firmware
1.0

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References