# CVE-2026-4976: A vulnerability was found in Totolink LR350 9.3.5u.6369_B20220309. This vulnerability affects the function…

Source: https://junglewise.ai/threats/cve-2026-4976-a-vulnerability-was-found-in-totolink-lr350-9-3-5u-6369-b20220309  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-27  
License: CC BY 4.0 with a link back

CVE-2026-4976 · Severity: high · CVSS 8.8 · Published 2026-03-27

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.

Technologies: [TOTOLINK Lr350](https://junglewise.ai/threats/technologies/lr350), [TOTOLINK Lr350 Firmware](https://junglewise.ai/threats/technologies/lr350-firmware). Vendors: [TOTOLINK](https://junglewise.ai/threats/vendors/totolink).

## Quick answers

**Is CVE-2026-4976 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-4976 being exploited in the wild.

**How severe is CVE-2026-4976?** High severity, with a CVSS score of 8.8, published 27 March 2026.

**Which products and versions are affected?** TOTOLINK Lr350, TOTOLINK Lr350 Firmware. The advisory does not name versions.

**Is there a fix for CVE-2026-4976?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-4976?** Check whether you run TOTOLINK Lr350 or TOTOLINK Lr350 Firmware. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- TOTOLINK Lr350
- TOTOLINK Lr350 Firmware

## Related threats

- [Totolink LR350 v9.3.5u.6369_B20220309 was discovered to contain a stack overflow via the ssid parameter in the…](https://junglewise.ai/threats/cve-2025-63465-totolink-lr350-v9-3-5u-6369-b20220309-was-discovered-to-contain-a)
- [Totolink LR350 v9.3.5u.6369_B20220309 was discovered to contain a stack overflow via the ssid parameter in the…](https://junglewise.ai/threats/cve-2025-63464-totolink-lr350-v9-3-5u-6369-b20220309-was-discovered-to-contain-a)