CVE-2014-125122

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.

PUBLISHED Reserved 2025-07-30 | Published 2025-07-31 | Updated 2025-11-21 | Assigner VulnCheck

Problem types

CWE-121 Stack-based Buffer Overflow

Product status

Credits

Craig Heffner finder

References

raw.githubusercontent.com/...ys_tmunblock_admin_reset_bof.rb exploit

www.exploit-db.com/exploits/31758 exploit

web.archive.org/...m/2014/02/wrt120n-fprintf-stack-overflow/ technical-description exploit

www.vulncheck.com/...ed-buffer-overflow-admin-password-reset third-party-advisory

cve.org (CVE-2014-125122)

nvd.nist.gov (CVE-2014-125122)

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