CVE-2006-1652

NONECVSS 0.09.0▲
EchelonGraph scoreLOW confidence

Score elevated to 9.0 because EPSS predicts 86% probability of exploitation within the next 30 days (top 0.6% 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 67%
CISA-KEV: Not listedEPSS: 67%CVSS: —Exploit: NoneExposed: 0

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

Multiple buffer overflows in (a) UltraVNC (aka Ultr@VNC) 1.0.1 and earlier and (b) tabbed_viewer 1.29 (1) allow user-assisted remote attackers to execute arbitrary code via a malicious server that sends a long string to a client that connects on TCP port 5900, which triggers an overflow in Log::ReallyPrint; and (2) allow remote attackers to cause a denial of service (server crash) via a long HTTP GET request to TCP port 5800, which triggers an overflow in VNCLog::ReallyPrint.

CVSS v3
—
EG Score
9.0(low)
EPSS
99.2%
KEV
Not listed

Published

April 6, 2006

Last Modified

April 16, 2026

References (24)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 21× 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. 2026-07-13 22:25 UTCEPSS rescore
  2. 2026-07-13 06:07 UTCEPSS rescore
  3. 2026-07-13 06:07 UTCEPSS rescore
  4. 2026-07-11 08:22 UTCEPSS rescore
  5. 2026-07-09 19:03 UTCEPSS rescore
  6. 2026-07-08 15:09 UTCEPSS rescore
  7. 2026-07-02 14:00 UTCEPSS rescore
  8. 2026-07-01 15:01 UTCEPSS rescore
  9. 2026-06-27 03:04 UTCEPSS rescore
  10. 2026-06-25 13:46 UTCEPSS rescore
  11. 2026-06-24 14:01 UTCEPSS rescore
  12. 2026-06-24 14:01 UTCEPSS rescore
  13. 2026-06-23 21:29 UTCEPSS rescore
  14. 2026-06-23 21:29 UTCEPSS rescore
  15. 2026-06-18 17:49 UTCEPSS rescore
  16. 2026-06-18 17:49 UTCEPSS rescore
  17. 2026-06-17 17:49 UTCEPSS rescore
  18. 2026-06-17 17:49 UTCEPSS rescore
  19. 2026-06-16 17:49 UTCEPSS rescore
  20. 2026-06-16 17:49 UTCEPSS rescore
  21. 2026-06-15 17:44 UTCEPSS rescore
  22. 2026-06-13 22:56 UTCEPSS rescore
  23. 2026-06-12 23:08 UTCEPSS rescore
  24. 2026-06-10 22:14 UTCEPSS rescore
  25. 2026-06-10 13:17 UTCEPSS rescore
Show 25 more
  1. 2026-06-06 13:44 UTCEPSS rescore
  2. 2026-06-06 13:44 UTCEPSS rescore
  3. 2026-06-05 22:43 UTCEPSS rescore
  4. 2026-06-02 20:10 UTCEPSS rescore
  5. 2026-06-02 20:10 UTCEPSS rescore
  6. 2026-06-01 13:49 UTCEPSS rescore
  7. 2026-06-01 13:49 UTCEPSS rescore
  8. 2026-06-01 13:49 UTCEPSS rescore
  9. 2026-05-31 09:18 UTCEG score recompute
  10. 2026-05-31 09:18 UTCGHSA enrichment
  11. 2026-05-31 00:13 UTCEPSS rescore
  12. 2026-05-31 00:13 UTCEPSS rescore
  13. 2026-05-31 00:13 UTCEPSS rescore
  14. 2026-05-29 13:40 UTCEPSS rescore
  15. 2026-05-28 13:42 UTCEPSS rescore
  16. 2026-05-28 13:42 UTCEPSS rescore
  17. 2026-05-26 13:41 UTCEPSS rescore
  18. 2026-05-26 13:41 UTCEPSS rescore
  19. 2026-05-26 07:16 UTCEPSS rescore
  20. 2026-05-26 07:16 UTCEPSS rescore
  21. 2026-05-22 21:15 UTCEPSS rescore
  22. 2026-05-22 21:15 UTCEPSS rescore
  23. 2026-05-20 22:36 UTCEPSS rescore
  24. 2026-05-20 22:36 UTCEPSS rescore
  25. 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-16490✓ verified
    First seen Apr 30, 2010

    UltraVNC 1.0.1 - Client Buffer Overflow (Metasploit)

    Open source ↗
  • Exploit-DBEDB-27568✓ verified
    First seen Apr 4, 2006

    UltraVNC 1.0.1 - Multiple Remote Error Logging Buffer Overflow Vulnerabilities (1)

    Open source ↗
  • Exploit-DBEDB-27569✓ verified
    First seen Apr 4, 2006

    UltraVNC 1.0.1 - Multiple Remote Error Logging Buffer Overflow Vulnerabilities (2)

    Open source ↗
  • Metasploitexploit/windows/vnc/ultravnc_client✓ verified
    First seen Apr 4, 2006

    UltraVNC 1.0.1 Client Buffer Overflow

    Open source ↗

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2006-1652?
CVE-2006-1652 is a none vulnerability published on April 6, 2006. Multiple buffer overflows in (a) UltraVNC (aka Ultr@VNC) 1.0.1 and earlier and (b) tabbed_viewer 1.29 (1) allow user-assisted remote attackers to execute arbitrary code via a malicious server that sends a long string to a client that connects on TCP port 5900, which triggers an overflow in…
When was CVE-2006-1652 disclosed?
CVE-2006-1652 was first published in the National Vulnerability Database on April 6, 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-2006-1652 actively exploited?
CVE-2006-1652 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2006-1652?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2006-1652, 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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