CVE-2023-33673
CWE-787Published: June 2, 2023· Updated: Jun 17, 2026
Official Description
Tenda AC8V4.0-V16.03.34.06 was discovered to contain a stack overflow via the firewallEn parameter in the formSetFirewallCfg function.
Risk Analysis
Tenda AC8 firmware is vulnerable to a stack-based buffer overflow via the firewallEn parameter. This flaw could allow a remote attacker to execute arbitrary code or cause a denial of service. The critical CVSS score indicates a severe risk to device security.
No public exploit is known, and it is not in the CISA KEV. The vulnerability is remotely exploitable.
Apply the latest firmware update provided by Tenda for the AC8. Disable remote management features if they are not necessary.
Technical Analysis
CVE-2023-33673 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 (4)
Quick Facts
Related CVEs (CWE-787)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-33673 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts