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CVE-2026-7839: ultravnc through 1.8.2.2 (inclusive); +1 more affected products
CVE-2026-7839. CVSS 3.1 base score 9.1 (CRITICAL, Source advisory). EPSS 0.00655 (percentile 0.50821), 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 initializes the HTTP administration server with a hardcoded default password
Component: repeater
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 9.1/10) 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-798
- CCR priority
- 36.6 /100 (P4)
- CVSS 3.1
- 9.1 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N · Source advisory
- EPSS
- 0.00655 · percentile 0.51087 · 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-2026-7839.html