CVE-2022-43970

Buffer overflow in Linksys WRT54GL

HIGH
7.2
CVSS Score
Published: January 9, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 05:07 AM UTC
2 products affected across 1 vendorWRT54GL FirmwareWRT54GL

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Severity
HIGH7.2
Exploit prediction
EPSS 19%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 4.30.18.006
linksys-wrt54gl (same device)
Firmware ≤ v ≤ 4.30.18.006Firmware

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

ExploitThird Party Advisory
https://youtu.be/73-1lhvJPNg
ExploitThird Party Advisory
https://youtu.be/RfWVYCUBNZ0
ExploitThird Party Advisory
https://youtu.be/TeWAmZaKQ_w

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.2HIGHtrellix
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-120CWE-787

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