CVE-2023-40894
CWE-787Published: August 24, 2023· Updated: Jun 17, 2026
Official Description
Tenda AC8 v4 US_AC8V4.0si_V16.03.34.06_cn was discovered to contain a stack overflow via parameter list at /goform/SetStaticRouteCfg.
Risk Analysis
The Tenda AC8 firmware is vulnerable to a stack overflow via the list parameter, which can be exploited by unauthenticated remote attackers. With a CVSS score of 9.8, this is a critical security risk.
No public exploit is known for this vulnerability, and it is not in the CISA KEV. It is remotely exploitable with low attack complexity.
Apply the latest firmware updates for the Tenda AC8. Restrict access to the router's management interface to authorized local users only.
Technical Analysis
CVE-2023-40894 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (2)
Quick Facts
Related CVEs (CWE-787)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-40894 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts