CVE-2025-3346
Published: 07 April 2025
Summary
CVE-2025-3346 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 8.7 (High).
Operationally, ranked in the top 8.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
A vulnerability rated critical has been identified in the Tenda AC7 router running firmware version 15.03.06.44. It resides in the formSetPPTPServer function of the /goform/SetPptpServerCfg endpoint, where improper handling of the pptp_server_start_ip and pptp_server_end_ip arguments triggers a buffer overflow. The issue is tracked under CWE-119 and CWE-120 and carries a CVSS 4.0 score of 8.7 reflecting network-accessible attack vectors with low complexity and high impact on confidentiality, integrity, and availability.
An authenticated remote attacker can supply crafted values to these parameters to overflow the buffer, potentially leading to arbitrary code execution or denial of service on the device. Publicly available exploit code demonstrates the attack, confirming that the flaw can be triggered without user interaction once network access to the management interface is obtained.
No vendor advisory or patch information is detailed in the referenced sources, which include a technical write-up on GitHub, VulDB entries, and the Tenda corporate site. The EPSS score has reached a peak of 0.0930 with a current value of 0.0681, indicating modest post-disclosure interest without a pronounced upward trajectory.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-15058
Vulnerability details
A vulnerability was found in Tenda AC7 15.03.06.44. It has been rated as critical. Affected by this issue is the function formSetPPTPServer of the file /goform/SetPptpServerCfg. The manipulation of the argument pptp_server_start_ip/pptp_server_end_ip leads to buffer overflow. The attack may be…
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launched remotely. The 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.