CVE-2026-4976 Details
Description
A vulnerability was found in Totolink LR350 9.3.5u.6369_B20220309. This vulnerability affects the function setWiFiGuestCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument ssid results in buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used.
A buffer overflow vulnerability has been identified in the Totolink LR350 router, specifically in the 9.3.5u.6369_B20220309 firmware version. The issue arises in the 'setWiFiGuestCfg' function within the file '/cgi-bin/cstecgi.cgi', where the 'ssid' argument is manipulated, leading to a stack-based buffer overflow. This vulnerability can be exploited remotely, and a public proof-of-concept exploit is available.
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://lavender-bicycle-a5a.notion.site/TOTOLINK-LR350-setWiFiGuestCfg-32153a41781f8048a918c1c78e95064e?source=copy_link | [email protected] | ExploitThird Party Advisory |
| https://vuldb.com/?ctiid.353863 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.353863 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.778274 | [email protected] | Third Party AdvisoryVDB Entry |
| https://www.totolink.net/ | [email protected] | Product |
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 lr350 firmware | 9.3.5u.6369_b20220309 |
CPE
Remediation
| |
| totolink lr350 | 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 |
| Apr 3, 2026 | Initial Analysis | [email protected] |
| Mar 27, 2026 | CVE Modified | [email protected] |
| Mar 27, 2026 | New CVE Received | [email protected] |