CVE-2019-8275

UltraVNC revision 1211 has multiple improper null termination vulnerabilities in VNC server code,...

9.8 Critical

UltraVNC revision 1211 has multiple improper null termination vulnerabilities in VNC server code, which result in out-of-bound data being accessed by remote users. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1212.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

3.97%Up 2.9 points since Apr 14, 2021

What each source reports

NVD Score used 9.8

Record: CVE-2019-8275
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-170
Updated: 2026-11-02

CVE List No score

Record: CVE-2019-8275
Weakness: CWE-170
Updated: 2026-11-02

EUVDEUVD-2019-17673 No score

Record: EUVD-2019-17673
Updated: 2026-11-03

GitHub AdvisoriesGHSA-hhw7-p92g-vp7v 9.8

UltraVNC revision 1211 has multiple improper null termination vulnerabilities in VNC server code,...

Record: GHSA-hhw7-p92g-vp7v
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-8275 is a critical vulnerability (CVSS 9.8) in Kaspersky Lab Ultravnc, published March 8, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.97%, the 90th percentile. No source names a fixed version.