CVE-2025-8833: Linksys RE6250/RE6300/RE6350/RE6500/RE7000/RE9000 langSwitchBack stack-based overflow

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-08-11 · updated 2026-06-17
Weakness: CWE-119

Description

A vulnerability was identified in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 up to 20250801. This issue affects the function langSwitchBack of the file /goform/langSwitchBack. The manipulation of the argument langSelectionOnly leads to stack-based buffer overflow. The attack may be initiated 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 Re6250 Firmware: 1.0.04.001
Linksys Re6300 Firmware: 1.2.07.001
Linksys Re6350 Firmware: 1.0.04.001
Linksys Re6500 Firmware: 1.0.013.001
Linksys Re7000 Firmware: 1.1.05.003
Linksys Re9000 Firmware: 1.0.04.002

References

https://github.com/wudipjq/my_vuln/blob/main/Linksys/vuln_38/38.md
https://github.com/wudipjq/my_vuln/blob/main/Linksys/vuln_38/38.md#poc
https://vuldb.com/?ctiid.319367
https://vuldb.com/?id.319367
https://vuldb.com/?submit.626698
https://www.linksys.com/
https://github.com/wudipjq/my_vuln/blob/main/Linksys/vuln_38/38.md
https://github.com/wudipjq/my_vuln/blob/main/Linksys/vuln_38/38.md#poc

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