PT-2025-31542 · Linksys · Linksys Wrt120N

Published 2014-02-14 · Updated 2025-07-31 · CVE-2014-125122

Positive Technologies (AI Summary)

CVSS v2.0

5.8

Medium

Base vector

AV:A/AC:L/Au:N/C:P/I:P/A:P

Name of the Vulnerable Software and Affected Versions Linksys WRT120N wireless routers (affected versions not specified)

Description A stack-based buffer overflow exists in the tmUnblock.cgi endpoint of Linksys WRT120N wireless routers. The issue occurs when processing the TM Block URL parameter. Exploitation may allow a remote attacker to gain unauthorized access to the web management interface by sending a specially crafted POST request. Specifically, a remote, unauthenticated attacker can overwrite memory in a controlled manner, allowing them to temporarily reset the device’s administrator password to a blank value, enabling unauthorized access to the router’s web administration interface without valid credentials.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

BDU:2025-09434

CVE-2014-125122

Affected Products

Linksys Wrt120N

References · 6

• https://bdu.fstec.ru/vul/2025-09434 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2014-125122 · Security Note
• https://web.archive.org/web/20210424073058/http://devttys0.com/2014/02/wrt120n-fprintf-stack-overflow · Note
• https://vulncheck.com/advisories/linksys-wrt120n-stack-based-buffer-overflow-admin-password-reset · Note
• https://exploit-db.com/exploits/31758 · Note
• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/admin/http/linksys_tmunblock_admin_reset_bof.rb · Note