CVE-2025-11356
Published: 07 October 2025
Summary
CVE-2025-11356 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Tenda Ac23 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 49.1% 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-2025-11356 is a buffer overflow vulnerability affecting Tenda AC23 routers up to version 16.03.07.52. The issue resides in the sscanf function of the /goform/SetStaticRouteCfg file, where manipulation of the argument list triggers the overflow. Classified under CWE-119 and CWE-120, it was published on 2025-10-07 with 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 (PR:L) can exploit this remotely over the network (AV:N) with low attack complexity (AC:L) and no user interaction required (UI:N). Successful exploitation grants high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H), potentially allowing arbitrary code execution or denial of service. A public exploit is available and could be used.
Advisories from VulDB (e.g., https://vuldb.com/?id.327241) and a GitHub repository (https://github.com/cymiao1978/cve/blob/main/12.md) detail the vulnerability; the Tenda vendor site (https://www.tenda.com.cn/) may provide patches or further guidance.
The public availability of an exploit raises concerns for real-world exploitation against unpatched Tenda AC23 devices.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-32111
Vulnerability details
A vulnerability was found in Tenda AC23 up to 16.03.07.52. Affected by this issue is the function sscanf of the file /goform/SetStaticRouteCfg. The manipulation of the argument list results in buffer overflow. It is possible to launch the attack remotely.…
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The exploit has been made public and could be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Buffer overflow in the publicly accessible web interface (/goform/SetStaticRouteCfg) of Tenda AC23 router enables remote code execution or denial of service via exploitation of a public-facing application.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Flaw remediation directly mitigates this CVE by identifying, reporting, and applying patches to correct the buffer overflow in the sscanf function of /goform/SetStaticRouteCfg.
Information input validation comprehensively prevents the buffer overflow by enforcing checks on manipulated argument lists passed to sscanf in the vulnerable static route configuration function.
Memory protection safeguards such as address space layout randomization and stack canaries directly counter buffer overflow exploitation attempts in the Tenda AC23 firmware.