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TI-2022-21605 Aliases CVE-2022-43970GHSA-f4c9-fwv7-5pmf

Buffer overflow in Linksys WRT54GL

Priority MEDIUM 52CWE-120Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.

Summary

A buffer overflow vulnerability exists in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. A stack-based buffer overflow in the Start_EPI function within the httpd binary allows an authenticated attacker with administrator privileges to execute arbitrary commands on the underlying Linux operating system as root. This vulnerablity can be triggered over the network via a malicious POST request to /apply.cgi.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.19454 97th percentileScored 2026-11-07
Public exploit Yes 3 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinksysWRT54GL Wireless-G Broadband RouterFirmware – 4.30.18.006—No fix listedCNA
  • WRT54GL Wireless-G Broadband Router VendorLinksys Affected Firmware – 4.30.18.006 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:linksys:wrt54gl_firmware:*:*:*:*:*:*:*:*up to 4.30.18.006VulnerableLinksys
cpe:2.3:h:linksys:wrt54gl:-:*:*:*:*:*:*:*not specified by NVDRunning onLinksys
  • cpe:2.3:o:linksys:wrt54gl_firmware:*:*:*:*:*:*:*:* Versions up to 4.30.18.006 Vulnerable ·Linksys
  • cpe:2.3:h:linksys:wrt54gl:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linksys

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-43970
  2. 2026-10-03 Alias added: GHSA-f4c9-fwv7-5pmf

References

Exploit 3

  • TI-2023-15197 There is a command injection vulnerability in the Linksys WRT54GL router with firmware… CVSS 3.1HIGH 7.2
  • TI-2024-01313 Linksys WRT54GL Web Management Interface SysInfo1.htm information disclosure CVSS 3.1MEDIUM 4.3
  • TI-2022-21608 Arbitrary code execution in Linksys WRT54GL CVSS 3.1HIGH 7.2
  • TI-2022-21607 Null pointer dereference in Linksys WRT54GL CVSS 3.1HIGH 7.5
  • TI-2024-01311 Linksys WRT54GL Web Management Interface SysInfo.htm information disclosure CVSS 3.1HIGH 7.5
  • TI-2024-01312 Linksys WRT54GL Web Management Interface wlaninfo.htm information disclosure CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences