CVE-2026-5021 Details
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.
A stack-based buffer overflow vulnerability has been identified in the Tenda F453 router, specifically in version 1.0.0.3. The issue arises in the 'fromPPTPUserSetting' function within the '/goform/PPTPUserSetting' file, part of the 'httpd' component. The vulnerability is triggered by manipulating the 'delno' parameter, which is not properly validated before being passed to a buffer. This oversight allows for remote exploitation, potentially leading to unauthorized code execution or a denial-of-service condition.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 30, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Litengzheng/vul_db/blob/main/F453/vul_92/README.md | [email protected] | ExploitThird Party Advisory |
| https://vuldb.com/submit/778415 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/353906 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/353906/cti | [email protected] | Permissions RequiredVDB Entry |
| https://www.tenda.com.cn/ | [email protected] | Product |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| tenda f453 firmware | 1.0.0.3 |
CPE
Remediation
| |
| tenda f453 | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 30, 2026 | Initial Analysis | [email protected] |
| Mar 29, 2026 | New CVE Received | [email protected] |