Buffer overflow in Linksys Wrt120n
CVE-2014-125122
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.
Vulnerability class: Buffer Overflow
EPSS: 0.008 (51.5th percentile) — read the EPSS interpretation.
Affected products
- Linksys Wrt120n — versions 1.0.07
Weakness classification (CWE)
Public proof-of-concept exploits
References
- disclosure@vulncheck.com (exploit)
- disclosure@vulncheck.com (exploit)
- disclosure@vulncheck.com (technical-description, exploit)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2014-125122?
- CVE-2014-125122 is a vulnerability in Linksys Wrt120n, classified under Stack-based Buffer Overflow. Published 2025-07-31.
- Is CVE-2014-125122 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.