CVE records

Every CVE as the CVE Program publishes it, refreshed every ten minutes, with NVD's analysis, CISA's known-exploited status and a healthcare tag. Subscribers get the CVEs that match their own systems on My program, by email as they are published. Where the data comes from: sources.

Updated under an hour ago ()

What this means for you

This week: 5,437 CVEs published, 355 critical, and 7 newly confirmed exploited. Add your stack to see whether any of them hit you.

Published in the last 7 days
5,437
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Critical, last 7 days
355
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Healthcare-tagged, last 7 days
4
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Known exploited (CISA KEV)
1,747
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Showing CVEs that name the product uvnc:ultravnc. Show all products

14 CVEs, showing 1 to 14
CVESeverityTitlePublished
CVE-2026-7840Critical 9.8UltraVNC repeater through 1.8.2.2 contains a global buffer overflow in its embedded HTTP administration server.Jul 1, 2026
CVE-2026-7839Critical 9.1UltraVNC repeater through 1.8.2.2 initializes the HTTP administration server with a hardcoded default password.Jul 1, 2026
CVE-2026-7838High 8.8UltraVNC viewer through 1.8.2.2 contains an integer overflow leading to a heap buffer overflow in the RFB protocol failure-response parsing path.Jul 1, 2026
CVE-2026-7831High 7.6UltraVNC viewer through 1.8.2.2 contains an off-by-one stack buffer overflow in the RFB ServerInit message handler.Jul 1, 2026
CVE-2026-7830High 7.4UltraVNC through 1.8.2.2 uses inadequate cryptography in the MS-Logon II authentication scheme (rfbUltraVNC_MsLogonIIAuth).Jul 1, 2026
CVE-2026-7829High 7.2UltraVNC repeater through 1.8.2.2 contains a post-authentication out-of-bounds write in the allow/deny rule parser.Jul 1, 2026
CVE-2026-7828Medium 5.3UltraVNC repeater through 1.8.2.2 contains an integer overflow in the HTTP request logging path.Jul 1, 2026
CVE-2026-44042Low 3.7UltraVNC repeater through 1.8.2.2 contains an off-by-one error in the Base64 decode helper used for HTTP Basic authentication.Jul 1, 2026
CVE-2026-44041Medium 6.5UltraVNC through 1.8.2.2 contains an out-of-bounds read in the wide-string to multibyte conversion helper.Jul 1, 2026
CVE-2026-44040Medium 6.5UltraVNC through 1.8.2.2 uses a cryptographically weak pseudo-random number generator to produce VNC authentication challenge bytes.Jul 1, 2026
CVE-2026-4962High 7.0A security flaw has been discovered in UltraVNC up to 1.6.4.0.Mar 27, 2026
CVE-2026-3787High 7.0A weakness has been identified in UltraVNC 1.6.4.0 on Windows.Mar 8, 2026
CVE-2020-37133High 7.5UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in the Repeater Host configuration field that allows attackers to crash the application.Feb 5, 2026
CVE-2020-37132Medium 5.5UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in its password configuration properties that allows local attackers to crash the application.Feb 5, 2026

CVSS is the assigning CNA's score where it gives one, otherwise NVD's. The healthcare tag is a documented heuristic (a list of clinical and health IT vendors, and clinical terms in the description), not a classification. The CVE record is authoritative.

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