CVE-2012-6066

NONECVSS 0.0Weaponized
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 40%CVSS: —Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

freeSSHd.exe in freeSSHd through 1.2.6 allows remote attackers to bypass authentication via a crafted session, as demonstrated by an OpenSSH client with modified versions of ssh.c and sshconnect2.c.

CVSS v3
—
EG Score
0.0(none)
EPSS
98.4%
KEV
Not listed

Published

December 4, 2012

Last Modified

April 29, 2026

References (2)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 2× in last 7d / 22× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-05 02:26 UTCEPSS rescore
  2. 2026-07-01 15:02 UTCEPSS rescore
  3. 2026-06-28 14:03 UTCEPSS rescore
  4. 2026-06-28 04:53 UTCEPSS rescore
  5. 2026-06-28 04:53 UTCEPSS rescore
  6. 2026-06-25 13:46 UTCEPSS rescore
  7. 2026-06-23 21:30 UTCEPSS rescore
  8. 2026-06-22 14:22 UTCEPSS rescore
  9. 2026-06-22 14:22 UTCEPSS rescore
  10. 2026-06-21 01:57 UTCEPSS rescore
  11. 2026-06-21 01:56 UTCEPSS rescore
  12. 2026-06-18 17:49 UTCEPSS rescore
  13. 2026-06-18 17:49 UTCEPSS rescore
  14. 2026-06-17 17:49 UTCEPSS rescore
  15. 2026-06-17 17:49 UTCEPSS rescore
  16. 2026-06-16 17:49 UTCEPSS rescore
  17. 2026-06-16 17:49 UTCEPSS rescore
  18. 2026-06-15 17:44 UTCEPSS rescore
  19. 2026-06-14 23:14 UTCEPSS rescore
  20. 2026-06-13 22:57 UTCEPSS rescore
  21. 2026-06-12 23:08 UTCEPSS rescore
  22. 2026-06-10 13:18 UTCEPSS rescore
  23. 2026-06-07 15:22 UTCEPSS rescore
  24. 2026-06-06 13:45 UTCEPSS rescore
  25. 2026-06-06 13:45 UTCEPSS rescore
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  1. 2026-06-05 22:44 UTCEPSS rescore
  2. 2026-06-05 22:44 UTCEPSS rescore
  3. 2026-06-05 06:08 UTCEPSS rescore
  4. 2026-06-05 06:08 UTCEPSS rescore
  5. 2026-06-02 20:10 UTCEPSS rescore
  6. 2026-06-02 20:10 UTCEPSS rescore
  7. 2026-06-01 13:49 UTCEPSS rescore
  8. 2026-06-01 13:49 UTCEPSS rescore
  9. 2026-05-31 22:28 UTCEPSS rescore
  10. 2026-05-31 22:28 UTCEPSS rescore
  11. 2026-05-31 00:14 UTCEPSS rescore
  12. 2026-05-31 00:14 UTCEPSS rescore
  13. 2026-05-29 13:41 UTCEPSS rescore
  14. 2026-05-29 13:41 UTCEPSS rescore
  15. 2026-05-29 01:39 UTCEG score recompute
  16. 2026-05-29 01:39 UTCGHSA enrichment
  17. 2026-05-28 13:42 UTCEPSS rescore
  18. 2026-05-28 13:42 UTCEPSS rescore
  19. 2026-05-28 13:42 UTCEPSS rescore
  20. 2026-05-27 13:38 UTCEPSS rescore
  21. 2026-05-27 13:38 UTCEPSS rescore
  22. 2026-05-26 07:16 UTCEPSS rescore
  23. 2026-05-26 07:16 UTCEPSS rescore
  24. 2026-05-22 21:15 UTCEPSS rescore
  25. 2026-05-22 21:15 UTCEPSS rescore
  26. 2026-05-22 21:15 UTCEPSS rescore
  27. 2026-05-20 22:37 UTCEPSS rescore
  28. 2026-05-20 22:37 UTCEPSS rescore
  29. 2026-05-18 21:29 UTCEPSS rescore
  30. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(4 references)

Working exploit code is in the public domain (1 Metasploit module) (3 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-24133✓ verified
    First seen Jan 15, 2013

    freeSSHd 1.2.6 - Authentication Bypass (Metasploit)

    Open source ↗
  • Exploit-DBEDB-23079✓ verified
    First seen Dec 2, 2012

    freeFTPd 1.2.6 - Remote Authentication Bypass

    Open source ↗
  • Exploit-DBEDB-23080✓ verified
    First seen Dec 2, 2012

    freeSSHd 2.1.3 - Remote Authentication Bypass

    Open source ↗
  • Metasploitexploit/windows/ssh/freesshd_authbypass✓ verified
    First seen Aug 11, 2010

    Freesshd Authentication Bypass

    Open source ↗

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2012-6066?
CVE-2012-6066 is a none vulnerability published on December 4, 2012. freeSSHd.exe in freeSSHd through 1.2.6 allows remote attackers to bypass authentication via a crafted session, as demonstrated by an OpenSSH client with modified versions of ssh.c and sshconnect2.c.
When was CVE-2012-6066 disclosed?
CVE-2012-6066 was first published in the National Vulnerability Database on December 4, 2012, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2012-6066 actively exploited?
CVE-2012-6066 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2012-6066?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2012-6066, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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