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Vulnerability record · CVE-2023-31742 · published 22 May 2023

CVE-2023-31742: Linksys wrt54gl firmware command injection vulnerability

Linksys · Wrt54gl Firmware

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.

7.2 CVSS 3.1 High EPSS 9.1% · top 4.8% CWE-77 · Command injection
7.2CVSS 3.1 base score
9.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
9 Jul 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/D2y6p/CVE/blob/main/Linksys/CVE-2023-31742/Linksys_WRT54GL_RCE.pdf ExploitMitigationThird Party Advisory
https://github.com/D2y6p/CVE/blob/main/Linksys/CVE-2023-31742/Linksys_WRT54GL_RCE.pdf ExploitMitigationThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2024-1404Linksys wrt54gl firmware information exposure vulnerabilityA vulnerability was found in Linksys WRT54GL 4.30.18 and classified as problematic. Affected by this issue is some unknown functionality of the file …EPSS 0.77%7.5CVE-2022-43972Linksys wrt54gl firmware null pointer dereference vulnerabilityA null pointer dereference vulnerability exists in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. A null pointer dereferen…EPSS 1.3%7.2CVE-2022-43970Linksys wrt54gl firmware classic buffer overflow vulnerabilityA buffer overflow vulnerability exists in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. A stack-based buffer overflow in …EPSS 19%7.2CVE-2022-43973Linksys wrt54gl firmware os command injection vulnerabilityAn arbitrary code execution vulnerability exisits in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. The Check_TSSI functio…EPSS 1.9%4.3CVE-2024-1406Linksys wrt54gl firmware information exposure vulnerabilityA vulnerability was found in Linksys WRT54GL 4.30.18. It has been declared as problematic. This vulnerability affects unknown code of the file /SysIn…EPSS 0.48%4.3CVE-2024-1405Linksys wrt54gl firmware information exposure vulnerabilityA vulnerability was found in Linksys WRT54GL 4.30.18. It has been classified as problematic. This affects an unknown part of the file /wlaninfo.htm o…EPSS 0.36%9.8CVE-2026-8037Progress LoadMaster API OS Command Injection RCEProgress LoadMaster (and related ADC products) contain an OS command injection flaw in multiple API command endpoints where unsanitized input is pass…KEVEPSS 77%analysed8.7CVE-2026-42271LiteLLM MCP test endpoints allow authenticated OS command injectionLiteLLM versions 1.74.2 through before 1.83.7 expose two MCP preview endpoints (POST /mcp-rest/test/connection and POST /mcp-rest/test/tools/list) th…KEVEPSS 13%analysed

Source: NIST National Vulnerability Database (record CVE-2023-31742), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.