Vulnerability · Published Mar 29, 2026 · Assigned by VulDB
CVE-2026-5021Tenda F453 httpd PPTPUserSetting fromPPTPUserSetting stack-based overflow
High 8.8
In plain English
A high-severity stack buffer overflow in F453 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.6%top 48.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A flaw has been found in Tenda F453 1.0.0.3. This affects the function fromPPTPUserSetting of the file /goform/PPTPUserSetting of the component httpd. This manipulation of the argument delno causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.
Affected products (as reported)
Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-353906 | Tenda F453 httpd PPTPUserSetting fromPPTPUserSetting stack-based overflow vdb-entry, technical-description
- VDB-353906 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #778415 | Tenda F453 v1.0.0.3 Stack-based Buffer Overflow third-party-advisory
- https://github.com/Litengzheng/vul_db/blob/main/F453/vul_92/README.md exploit
- https://www.tenda.com.cn/ product