CVE-2023-31742: There is a command injection vulnerability in the Linksys WRT54GL router with firmware version 4.30.18.006.
There is a command injection vulnerability in the Linksys WRT54GL router with firmware version 4.30.18.006. If an attacker gains web management privileges, they can inject commands into the post request parameters wl_ant, wl_rate, WL_atten_ctl, ttcp_num, ttcp_size in the httpd s Start_EPI() function, thereby gaining shell privileges.
Security readout for executives and security teams
CVE-2023-31742 affects Linksys WRT54GL firmware 4.30.18.006. An attacker who already has web management privileges could inject commands through specific router settings and gain shell-level control. This is serious for organizations still using or exposing these legacy routers, but the provided sources do not show active exploitation. Likely limited to Linksys WRT54GL devices running firmware 4.30.18.006. Exposure is highest where web management is enabled, reachable from untrusted networks, or shared among many administrators. The CVE record’s affected product metadata is incomplete, so confirm against asset inventory. Prioritize remediation if these routers are still deployed, especially at network edges or remotely managed sites. The business risk is full device compromise after privileged management access, which can undermine network integrity and availability. Mitigation focus: Check Linksys guidance for fixed firmware, support status, or retirement advice.; Remove internet exposure from the web management interface.; Restrict management access to trusted administrative networks and accounts..
Prepared
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
Conservative CVE-to-ATT&CK context
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CWE-77: Command execution behavior lookup
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1CVSS vectors
3Timeline events
2ADP providers
2Source links
SSVC decision data
CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: noTechnical Impact: total
CVSS vector scores
1 official score
We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.