CVE-2025-60335 Details
Description
A NULL pointer dereference in the main function of TOTOLINK N600R v4.3.0cu.7866_B20220506 allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.
A NULL pointer dereference vulnerability has been identified in the TOTOLINK N600R wireless router, specifically in version 4.3.0cu.7866_B20220506. The issue arises in the main function of the cstecgi.cgi file, where the CONTENT_LENGTH environment variable is retrieved and used to allocate memory with malloc. If CONTENT_LENGTH is set to a large value, malloc returns NULL, which is then passed to memset without a null check. This oversight allows remote attackers to cause a denial-of-service condition by triggering a null pointer dereference.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Oct 23, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/z472421519/BinaryAudit/blob/main/PoC/NPD/TOTOLink/main/CONTENT_LENGTH_MAX.md | CISA-ADP | ExploitThird Party Advisory |
| https://github.com/z472421519/BinaryAudit/blob/main/PoC/NPD/TOTOLink/main/CONTENT_LENGTH_MAX.md | [email protected] | ExploitThird Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| totolink n600r firmware | 4.3.0cu.7866_b20220506 |
CPE
Remediation
| |
| totolink n600r | All versions |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Oct 24, 2025 | Initial Analysis | [email protected] |
| Oct 23, 2025 | CVE Modified | CISA-ADP |
| Oct 22, 2025 | New CVE Received | [email protected] |