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Fencer Vulns
high 7.2

CVE-2022-43970 in the critical feed json

Buffer overflow in Linksys WRT54GL

published 2023-01-09 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-46938

cvss
7.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
19.5%
EPSS 19.5% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

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.

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
19 mo ago

Exploit prediction

19.45% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • youtu.be https://youtu.be/73-1lhvJPNg referenced PoC, tagged "exploit" by a source, unverified
  • youtu.be https://youtu.be/TeWAmZaKQ_w referenced PoC, tagged "exploit" by a source, unverified
  • youtu.be https://youtu.be/RfWVYCUBNZ0 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linksys WRT54GL Wireless-G Broadband Router

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input
  • CWE-787 Out-of-bounds Write

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.