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.
References (5)
Core 5
Core References
Product product
https://www.linksys.com/
Permissions Required vdb-entry
technical-description
https://vuldb.com/?id.276488
Permissions Required signature
permissions-required
https://vuldb.com/?ctiid.276488
Third Party Advisory, VDB Entry third-party-advisory
https://vuldb.com/?submit.398567
Exploit, Third Party Advisory exploit
https://github.com/BuaaIOTTeam/Iot_Linksys/blob/main/Linksys_WRT54G_validate_services_port.md
Scores
CVSS v3
6.3
EPSS
0.0029
EPSS Percentile
52.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-121
CWE-787
Status
published
Products (1)
linksys/wrt54g_firmware
4.21.5
Published
Sep 04, 2024
Tracked Since
Feb 18, 2026