# CVE-2014-125122

## Summary

- **CVE ID:** CVE-2014-125122
- **Severity:** MEDIUM
- **CVSS Score:** 5.3 (CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N)
- **CWE:** CWE-121
- **Published:** Jul 31, 2025
- **Last Modified:** Apr 7, 2026

## Description

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.

## Affected Products

- Linksys — WRT120N (1.0.07)

## References

- [CNA](https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/admin/http/linksys_tmunblock_admin_reset_bof.rb)
- [CNA](https://www.exploit-db.com/exploits/31758)
- [CNA](https://web.archive.org/web/20210424073058/http://www.devttys0.com/2014/02/wrt120n-fprintf-stack-overflow/)
- [CNA](https://www.vulncheck.com/advisories/linksys-wrt120n-stack-based-buffer-overflow-admin-password-reset)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 31.80%
- **EPSS Percentile:** 96.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._