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CVE-2026-7830: ultravnc through 1.8.2.2 (inclusive); +1 more affected products
CVE-2026-7830. CVSS 3.1 base score 7.4 (HIGH, Source advisory). EPSS 0.00285 (percentile 0.19963), scored 24-Oct-2026.
Affected technology
ultravnc · through 1.8.2.2 (inclusive)
uvnc
UltraVNC · 0 through 1.8.2.2
uvnc
Description’s affected range: through 1.8.2.2 uses inadequate cryptography in the MS-Logon II authentication scheme (rfbUltraVNC_MsLogonIIAuth)
Component: winvnc, ms-logon
Attack conditions (Source advisory, CVSS 3.1): Network (remote) · No privileges required · No user interaction required
What an attacker can do
Source advisory’s CVSS 3.1 assessment (base score 7.4/10) rates confidentiality and integrity impact as high; availability impact as none. The description does not specify what an attacker can achieve beyond these rated impacts.
- CWE
- CWE-326, CWE-338
- CCR priority
- 29.7 /100 (P4)
- CVSS 3.1
- 7.4 /10 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N · Source advisory
- EPSS
- 0.00285 · percentile 0.20791 · 2026-10-25
- KEV
- no
Provenance
- FIRST EPSS daily exploit-probability · Source record · observed 2026-10-25 19:52:47.952465+00:00 UTC
- NVD CVE API 2.0 · Source record · observed 2026-10-25 19:51:06.643138+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2026-7830.html