CVE-2022-43972: Null pointer dereference in Linksys WRT54GL
Vulnerability summary
CVE-2022-43972 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in linksys wrt54gl_firmware. EPSS estimates a 1.35% chance of exploitation in the next 30 days, higher than 71.3% of scored vulnerabilities. 3 public exploits are recorded.
Timeline
- 09-01-2023PublishedVulnerability first disclosed.
- 09-04-2025Last modifiedVulnerability information updated.
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 metrics
2 scores · 2 sources · 1 version- CVE.orgCNA6.5MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HDiffers
EPSS trend
Probability
1.35%
Chance of exploitation in the next 30 days
Percentile
71%
Versus all other CVEs
30-day change
Increase +0.04 pp
From 1.31% on 22-09-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
3 foundExploit Reference (youtu.be)
Maturity: unknown
Exploit Reference (youtu.be)
Maturity: unknown
Exploit Reference (youtu.be)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Linksys2 products
- wrt54gl_firmware≤ 4.30.18.006
- wrt54gl wireless-g broadband router≥ Firmware, ≤ 4.30.18.006
1 vendor · 2 products