Read the docs
TI-2022-21607 Aliases CVE-2022-43972GHSA-2p3f-3cj6-r8vv

Null pointer dereference in Linksys WRT54GL

Priority LOW 36CWE-476Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-476.

Summary

A null pointer dereference vulnerability exists in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. A null pointer dereference in the soap_action function within the upnp binary can be triggered by an unauthenticated attacker via a malicious POST request invoking the AddPortMapping action.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01351 71st 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
Partial

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-2022-43972
  2. 2026-10-03 Alias added: GHSA-2p3f-3cj6-r8vv

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-2022-21605 Buffer overflow in Linksys WRT54GL CVSS 3.1HIGH 7.2
  • TI-2022-21608 Arbitrary code execution in Linksys WRT54GL CVSS 3.1HIGH 7.2
  • 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