CVE-2014-125122
Linksys WRT120N tmUnblock.cgi Stack-Based Buffer Overflow Admin Password Reset
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-121 |
| Vendor | linksys |
| Product | wrt120n |
| Published | Jul 31, 2025 |
| Last Updated | Apr 7, 2026 |
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Affected Versions
Linksys / WRT120N
1.0.07
References
raw.githubusercontent.com: https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/admin/http/linksys_tmunblock_admin_reset_bof.rb exploit-db.com: https://www.exploit-db.com/exploits/31758 web.archive.org: https://web.archive.org/web/20210424073058/http://www.devttys0.com/2014/02/wrt120n-fprintf-stack-overflow/ vulncheck.com: https://www.vulncheck.com/advisories/linksys-wrt120n-stack-based-buffer-overflow-admin-password-reset
Credits
Craig Heffner