CVE-2026-116508 Details
Description
A security flaw has been discovered in TOTOLINK A950RG 4.1.2cu.5268_B20221104. Affected by this issue is the function sub_402340 of the file infostat.cgi of the component Device-Information CGI. Performing a manipulation of the argument CONTENT_LENGTH results in stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks.
A stack-based buffer overflow vulnerability has been identified in the TOTOLINK A950RG router, specifically in the device-information CGI script 'infostat.cgi'. This issue arises in version 4.1.2cu.5268_B20221104. The vulnerability is triggered by manipulating the 'Content-Length' header, which the CGI uses to determine the length of the request body. The absence of proper length checks allows for data to be written beyond the allocated buffer, creating a stack overflow condition. This vulnerability can be exploited remotely without authentication, and the exploit has been made public.
To address this vulnerability, the 'infostat.cgi' script should be removed from the CGI mapping or placed behind an authentication gate. The vulnerability can also be mitigated by rebuilding the firmware with proper stack protection, as a position-independent executable, and by implementing length checks on the 'Content-Length' header before processing the request body.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 26, 2026CISA-ADP
Assessed Oct 31, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://gist.github.com/H3rmesk1t/ad72def4ccc232757d4cbabf45da72cb | [email protected] | ExploitTechnical Analysis |
| https://vuldb.com/cve/CVE-2026-116508 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/1022557 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/426406 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/426406/cti | [email protected] | Content Wall |
| https://www.totolink.net/ | [email protected] | Vendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| 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 |
|---|---|
| TOTOLINK A950RG | V4.1.2cu.5268_B20221104 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 31, 2026 | CVE Modified | CISA-ADP |
| Oct 26, 2026 | New CVE Received | [email protected] |