CVE-2014-125122 — Linksys WRT120N tmUnblock.cgi Stack-Based Buffer Overflow Admin Password Reset
A stack-based buffer overflow vulnerability exists in the tmUnblock.cgi endpoint of the Linksys WRT120N wireless router. The vulnerability is triggered by sending a specially cr…
Published: 2025-07-31 · CVSS: 5.3 · CVSS 4.0
A stack-based buffer overflow vulnerability exists in the tmUnblock.cgi endpoint of the Linksys WRT120N wireless router. The vulnerability is triggered by sending a specially crafted HTTP POST request with an overly long TM_Block_URL parameter to the endpoint. By exploiting this flaw, an unauthenticated remote attacker can overwrite memory in a controlled manner, enabling them to temporarily reset the administrator password of the device to a blank value. This grants unauthorized access to the router’s web management interface without requiring valid credentials.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7