CVE-2025-11327
Published: 06 October 2025
Summary
CVE-2025-11327 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Tenda Ac18 Firmware. Its CVSS base score is 7.4 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 49.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Deeper analysis
CVE-2025-11327 is a stack-based buffer overflow vulnerability affecting the Tenda AC18 router on firmware version 15.03.05.19(6318). The flaw exists in unknown code within the /goform/SetUpnpCfg file, where manipulation of the upnpEn argument triggers the overflow. It is remotely exploitable and associated with CWE-119 and CWE-121, earning a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
An attacker with low privileges can exploit this vulnerability remotely over the network with low complexity and no user interaction required. Successful exploitation could result in high impacts to confidentiality, integrity, and availability, potentially allowing arbitrary code execution on the affected device.
An exploit for CVE-2025-11327 has been publicly disclosed on GitHub, increasing the risk of widespread abuse. Security advisories are available via VulDB entries, and practitioners should monitor the Tenda website for patches or mitigation guidance.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-32188
Vulnerability details
A security vulnerability has been detected in Tenda AC18 15.03.05.19(6318). This vulnerability affects unknown code of the file /goform/SetUpnpCfg. The manipulation of the argument upnpEn leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit…
more
has been disclosed publicly and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack-based buffer overflow in the unauthenticated web endpoint /goform/SetUpnpCfg of Tenda AC18 router enables remote code execution or denial of service on a public-facing network device.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires timely remediation of the stack-based buffer overflow vulnerability through firmware patching for the affected Tenda AC18 /goform/SetUpnpCfg endpoint.
Mandates validation of the upnpEn argument to block malformed inputs that trigger the stack-based buffer overflow.
Deploys memory protections such as stack canaries and address space layout randomization to mitigate exploitation of the stack-based buffer overflow.