CVE-2026-5021: Stack-based Buffer Overflow in Tenda F453
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.
AI Analysis
Technical Summary
This vulnerability affects Tenda F453 firmware version 1.0.0.3 and involves a stack-based buffer overflow in the fromPPTPUserSetting function of the /goform/PPTPUserSetting endpoint in the httpd component. The flaw is caused by improper handling of the delno argument, which can be manipulated remotely to overflow the stack buffer. The vulnerability has a CVSS 4.0 base score of 8.7, indicating high severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. Exploit code has been published but no active exploitation has been reported.
Potential Impact
Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code or cause a denial of service on the affected device. The high CVSS score reflects significant potential impact on confidentiality, integrity, and availability of the device. However, there are currently no reports of exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should monitor for updates from Tenda and consider limiting network exposure of the affected device. No official patch or workaround information is currently available.
CVE-2026-5021: Stack-based Buffer Overflow in Tenda F453
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects Tenda F453 firmware version 1.0.0.3 and involves a stack-based buffer overflow in the fromPPTPUserSetting function of the /goform/PPTPUserSetting endpoint in the httpd component. The flaw is caused by improper handling of the delno argument, which can be manipulated remotely to overflow the stack buffer. The vulnerability has a CVSS 4.0 base score of 8.7, indicating high severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. Exploit code has been published but no active exploitation has been reported.
Potential Impact
Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code or cause a denial of service on the affected device. The high CVSS score reflects significant potential impact on confidentiality, integrity, and availability of the device. However, there are currently no reports of exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should monitor for updates from Tenda and consider limiting network exposure of the affected device. No official patch or workaround information is currently available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-03-27T14:17:42.535Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 69c880b1919ccadcdf7c0d1a
Added to database: 3/29/2026, 1:30:25 AM
Last enriched: 4/5/2026, 10:52:30 AM
Last updated: 5/12/2026, 2:41:07 PM
Views: 120
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