CVE-2006-2369

NONECVSS 0.09.0▲
EchelonGraph scoreLOW confidence

Score elevated to 9.0 because EPSS predicts 92% probability of exploitation within the next 30 days (top 0.3% of all CVEs). Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss
Weaponized
0.0
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 92%
CISA-KEV: Not listedEPSS: 92%CVSS: —Exploit: NoneExposed: 0

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

RealVNC 4.1.1, and other products that use RealVNC such as AdderLink IP and Cisco CallManager, allows remote attackers to bypass authentication via a request in which the client specifies an insecure security type such as "Type 1 - None", which is accepted even if it is not offered by the server, as originally demonstrated using a long password.

CVSS v3
—
EG Score
9.0(low)
EPSS
99.8%
KEV
Not listed

Published

May 15, 2006

Last Modified

April 16, 2026

References (53)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
debian:10vnc4 @ 4.1.1+X4.3.0-10—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 1× in last 7d / 11× 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. 2026-07-01 15:01 UTCEPSS rescore
  2. 2026-06-25 13:46 UTCEPSS rescore
  3. 2026-06-23 21:29 UTCEPSS rescore
  4. 2026-06-23 21:29 UTCEPSS rescore
  5. 2026-06-20 10:12 UTCOSV refresh
  6. 2026-06-17 17:49 UTCEPSS rescore
  7. 2026-06-17 17:49 UTCEPSS rescore
  8. 2026-06-15 17:44 UTCEPSS rescore
  9. 2026-06-12 23:08 UTCEPSS rescore
  10. 2026-06-10 13:17 UTCEPSS rescore
  11. 2026-06-07 15:21 UTCEPSS rescore
  12. 2026-06-05 06:07 UTCEPSS rescore
  13. 2026-06-05 06:07 UTCEPSS rescore
  14. 2026-06-04 13:09 UTCEPSS rescore
  15. 2026-06-04 13:09 UTCEPSS rescore
  16. 2026-05-31 08:39 UTCEG score recompute
  17. 2026-05-31 08:39 UTCGHSA enrichment
  18. 2026-05-29 13:40 UTCEPSS rescore
  19. 2026-05-29 02:06 UTCOSV refresh
  20. 2026-05-28 13:42 UTCEPSS rescore
  21. 2026-05-28 13:42 UTCEPSS rescore
  22. 2026-05-27 13:37 UTCEPSS rescore
  23. 2026-05-27 13:37 UTCEPSS rescore
  24. 2026-05-24 16:42 UTCEPSS rescore
  25. 2026-05-22 21:15 UTCEPSS rescore
Show 4 more
  1. 2026-05-22 21:15 UTCEPSS rescore
  2. 2026-05-20 22:36 UTCEPSS rescore
  3. 2026-05-20 22:36 UTCEPSS rescore
  4. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(6 references)

Working exploit code is in the public domain (2 Metasploit modules) (4 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-36932✓ verified
    First seen May 13, 2012

    RealVNC 4.1.0/4.1.1 - Authentication Bypass

    Open source ↗
  • Exploit-DBEDB-17719✓ verified
    First seen Aug 26, 2011

    RealVNC - Authentication Bypass (Metasploit)

    Open source ↗
  • Exploit-DBEDB-1791✓ verified
    First seen May 16, 2006

    RealVNC 4.1.0 < 4.1.1 - VNC Null Authentication Bypass

    Open source ↗
  • Exploit-DBEDB-1794✓ verified
    First seen May 15, 2006

    RealVNC 4.1.0 < 4.1.1 - VNC Null Authentication Bypass (Metasploit)

    Open source ↗
  • Metasploitauxiliary/admin/vnc/realvnc_41_bypass✓ verified
    First seen May 15, 2006

    RealVNC NULL Authentication Mode Bypass

    Open source ↗
  • Metasploitauxiliary/scanner/vnc/vnc_none_auth✓ verified
    First seen Jan 1, 2006

    VNC Authentication None Detection

    Open source ↗

Related CVEs(same product + same CWE)

Frequently asked(4)

What is CVE-2006-2369?
CVE-2006-2369 is a none vulnerability published on May 15, 2006. RealVNC 4.1.1, and other products that use RealVNC such as AdderLink IP and Cisco CallManager, allows remote attackers to bypass authentication via a request in which the client specifies an insecure security type such as "Type 1 - None", which is accepted even if it is not offered by the server,…
When was CVE-2006-2369 disclosed?
CVE-2006-2369 was first published in the National Vulnerability Database on May 15, 2006, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2006-2369 actively exploited?
CVE-2006-2369 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2006-2369?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2006-2369, 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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