Vulnerability in Uvnc Ultravnc
CVE-2026-4962
A security flaw has been discovered in UltraVNC up to 1.6.4.0. Affected by this issue is some unknown functionality in the library version.dll of the component Service. The manipulation results in uncontrolled search path. The attack needs to be approached locally. This attack is characterized by high complexity. The exploitation is known to be difficult. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: -0.000
Affected products
- Uvnc Ultravnc
- Ultravnc — versions 1.6.0, 1.6.1, 1.6.2
Weakness classification (CWE)
References
- vuldb.com/ (VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (Exploit, VDB Entry, Third Party Advisory, third-party-advisory)
- drive.google.com/file/d/1QC-MrqGsfjr4phEN77krLFZHQN8S48U_/view (Permissions Required, exploit)
Frequently asked questions
- What is CVE-2026-4962?
- CVE-2026-4962 is a high-severity vulnerability in Uvnc Ultravnc, classified under Untrusted Search Path. CVSS score: 7.0/10. Published 2026-03-27.
- How severe is CVE-2026-4962?
- High severity. CVSS v3 base score is 7.0 out of 10.