CVE-2025-5861
Published: 09 June 2025
Summary
CVE-2025-5861 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Tenda Ac7 Firmware. Its CVSS base score is 7.4 (High).
Operationally, ranked in the top 21.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
A vulnerability classified as critical has been identified in Tenda AC7 firmware version 15.03.06.44. It resides in the fromadvsetlanip function of the /goform/AdvSetLanip endpoint, where improper handling of the lanMask argument triggers a buffer overflow. The flaw is tracked under CWE-119 and CWE-120 and carries a CVSS 4.0 score of 7.4.
The issue can be exploited remotely by an authenticated attacker who supplies a crafted lanMask value, potentially resulting in arbitrary code execution or denial of service on the affected router. Public disclosure of exploit code increases the likelihood that the technique could be reused or adapted by other threat actors.
The associated EPSS score remains low and unchanged at 0.0115, indicating no material increase in observed exploitation interest since publication. No vendor advisory or patch information is referenced in the available sources.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-17427
Vulnerability details
A vulnerability has been found in Tenda AC7 15.03.06.44 and classified as critical. This vulnerability affects the function fromadvsetlanip of the file /goform/AdvSetLanip. The manipulation of the argument lanMask leads to buffer overflow. The attack can be initiated remotely. The…
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exploit has been disclosed to the public and may be used.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Managed runtimes used by platform-independent applications (e.g., JVM, CLR) enforce memory safety, preventing most buffer overflows that require direct memory manipulation.
Ongoing control assessments and code testing (static/dynamic analysis, fuzzing) surface memory buffer restriction failures, which are then remediated before release.
Memory protections (e.g., W^X, ASLR) make exploitation of buffer-boundary violations far harder to turn into code execution.
Detects exploitation attempts that produce memory corruption, crashes, or anomalous behavior.