CVE-2024-8408: Linksys WRT54G POST Parameter apply.cgi validate_services_port stack-based overflow

Severity: critical (CVSS 9.8 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: yes
Published: 2024-09-04 · updated 2026-06-17
Weakness: CWE-121

Description

A vulnerability was found in Linksys WRT54G 4.21.5. It has been rated as critical. Affected by this issue is the function validate_services_port of the file /apply.cgi of the component POST Parameter Handler. The manipulation of the argument services_array leads to stack-based buffer overflow. The attack may be launched 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 WRT54G: 4.21.5

References

https://github.com/BuaaIOTTeam/Iot_Linksys/blob/main/Linksys_WRT54G_validate_services_port.md
https://vuldb.com/?ctiid.276488
https://vuldb.com/?id.276488
https://vuldb.com/?submit.398567
https://www.linksys.com/

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