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Vulnerability record · CVE-2022-43972 · published 9 January 2023

CVE-2022-43972: Linksys wrt54gl firmware null pointer dereference vulnerability

Linksys · Wrt54gl Firmware

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.

7.5 CVSS 3.1 High EPSS 1.3% · top 30.4% CWE-476 · NULL pointer dereference
7.5CVSS 3.1 base score
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 6 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

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

Affected products

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

References

LinkTags
https://youtu.be/73-1lhvJPNg ExploitThird Party Advisory
https://youtu.be/RfWVYCUBNZ0 ExploitThird Party Advisory
https://youtu.be/TeWAmZaKQ_w ExploitThird Party Advisory
https://youtu.be/73-1lhvJPNg ExploitThird Party Advisory
https://youtu.be/RfWVYCUBNZ0 ExploitThird Party Advisory
https://youtu.be/TeWAmZaKQ_w ExploitThird 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%7.2CVE-2023-31742Linksys wrt54gl firmware command injection vulnerabilityThere is a command injection vulnerability in the Linksys WRT54GL router with firmware version 4.30.18.006. If an attacker gains web management privi…EPSS 9.1%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%6.2CVE-2026-21525Windows Remote Access Connection Manager null pointer dereference DoSWindows Remote Access Connection Manager contains a null pointer dereference (CWE-476) that lets an unauthorized attacker deny service locally. The f…KEVEPSS 4.8%analysed

Source: NIST National Vulnerability Database (record CVE-2022-43972), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.