CVE-2025-11122
Published: 28 September 2025
Summary
CVE-2025-11122 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 41.9% 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-2025-11122 is a stack-based buffer overflow vulnerability affecting the Tenda AC18 router running firmware version 15.03.05.19. The issue resides in an unknown function within the /goform/WizardHandle endpoint, where manipulation of the WANT/mtuvalue argument triggers the overflow. This flaw, linked to CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-121 (Stack-based Buffer Overflow), has 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), indicating high severity due to its potential for remote exploitation.
Attackers with low privileges (such as authenticated users) can exploit this vulnerability remotely over the network with low complexity and no user interaction required. Successful exploitation could result in high-impact confidentiality, integrity, and availability violations, potentially allowing arbitrary code execution, data theft, or device takeover on the affected router.
Advisories and related resources, including entries on vuldb.com (ctiid.326203, id.326203, submit.664194), document the vulnerability but do not specify patches or vendor mitigations in the available details. Public proof-of-concept exploits are available on GitHub at repositories detailing the WizardHandle endpoints for Tenda AC18, increasing the risk of widespread abuse.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-31477
Vulnerability details
A vulnerability was detected in Tenda AC18 15.03.05.19. This affects an unknown function of the file /goform/WizardHandle. The manipulation of the argument WANT/mtuvalue results in stack-based buffer overflow. The attack can be launched remotely. The exploit is now public and…
more
may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack-based buffer overflow in the publicly accessible web endpoint (/goform/WizardHandle) of Tenda AC18 router enables remote exploitation for initial access.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly prevents stack-based buffer overflows by validating inputs like the WANT/mtuvalue argument in the /goform/WizardHandle endpoint.
Mitigates exploitation of stack buffer overflows through memory protections such as stack canaries, ASLR, and non-executable stacks.
Ensures timely identification, reporting, and patching of the specific buffer overflow flaw in Tenda AC18 firmware.