Cyber Resilience

CVE-2025-55503

HighPublic PoC

Published: 20 August 2025

Published
20 August 2025
Modified
21 August 2025
KEV Added
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Patch
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CVSS Score v3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS Score 0.0013 32.0th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-55503 is a high-severity Stack-based Buffer Overflow (CWE-121) vulnerability in Tenda Ac6 Firmware. Its CVSS base score is 7.3 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 32.0th 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

Tenda AC6 V15.03.06.23_multi has a stack overflow vulnerability via the deviceName parameter in the saveParentControlInfo function.

CWE(s)
CWE-121

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?

Stack overflow in web function saveParentControlInfo via deviceName parameter enables remote code execution or denial-of-service on public-facing router web application.

Affected Assets

tenda
ac6 firmware
15.03.06.23_multi

Mitigating Controls

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

References