CVE-2026-123960 Details
Description
A weakness has been identified in TOTOLINK CA300-PoE 6.2c.884. This affects the function setWanConfig of the file /cgi-bin/cstecgi.cgi. Executing a manipulation of the argument pppoeUser/priDns/secDns can lead to buffer overflow. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks.
A buffer overflow vulnerability has been identified in the TOTOLINK CA300-PoE router, specifically in version 6.2c.884. The issue arises in the 'setWanConfig' function within the '/cgi-bin/cstecgi.cgi' file. The vulnerability can be exploited remotely by manipulating the 'pppoeUser', 'priDns', or 'secDns' arguments. Publicly available exploit information suggests that this vulnerability could be actively exploited.
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.
Volerion
Assessed Nov 7, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://lavender-bicycle-a5a.notion.site/TOTOLINK-CA300-PoE-setWanConfig-3f953a41781f80ec86f3c2840cb5fc4b?source=copy_link | [email protected] | |
| https://vuldb.com/cve/CVE-2026-123960 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/1033722 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/432023 | [email protected] | Permission Required |
| https://vuldb.com/vuln/432023/cti | [email protected] | Permission Required |
| 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-120 | Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| TOTOLINK CA300-PoE | 6.2c.884 |
CPE
Remediation
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Change History
1 change record found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 7, 2026 | New CVE Received | [email protected] |
Volerion