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
Published · last modified .
EPSS exploit prediction
EPSS: 0.011 (64.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.011 · change: +0.003
Affected products
- Linksys Wrt120n — versions 1.0.07
Weakness classification (CWE)
Public proof-of-concept exploits
References
- raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/… (exploit)
- www.exploit-db.com/exploits/31758 (exploit)
- web.archive.org/web/20210424073058/http://www.devttys0.com/2014/02/wrt120n-fpri… (technical-description, exploit)
- www.vulncheck.com/advisories/linksys-wrt120n-stack-based-buffer-overflow-admin-… (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.