CVE-2025-6751: Linksys E8450 HTTP POST Request portal.cgi set_device_language buffer overflow

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-06-27 · updated 2026-06-17
Weakness: CWE-119

Description

A vulnerability, which was classified as critical, was found in Linksys E8450 up to 1.2.00.360516. This affects the function set_device_language of the file portal.cgi of the component HTTP POST Request Handler. The manipulation of the argument dut_language leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

Linksys E8450: 1.2.00.360516

References

https://github.com/CH13hh/tmp_store_cc/blob/main/E8450/1.md
https://github.com/CH13hh/tmp_store_cc/blob/main/E8450/1.md#poc
https://vuldb.com/?ctiid.314049
https://vuldb.com/?id.314049
https://vuldb.com/?submit.598217
https://www.linksys.com/

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