CVE-2019-8260

UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC client RRE decoder code,...

9.8 Critical

UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC client RRE decoder code, caused by multiplication overflow. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1200.

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

2.25%Up 1.4 points since Apr 14, 2021

What each source reports

NVD Score used 9.8

Record: CVE-2019-8260
CVSS 3.0: 9.8 CriticalCVSS:3.0/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-125
Updated: 2026-11-02

CVE List No score

Record: CVE-2019-8260
Weakness: CWE-125
Updated: 2026-11-02

EUVDEUVD-2019-17658 No score

Record: EUVD-2019-17658
Updated: 2026-11-03

GitHub AdvisoriesGHSA-vm9w-77x5-h7q8 9.8

UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC client RRE decoder code,...

Record: GHSA-vm9w-77x5-h7q8
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-125
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-2019-8260 is a critical vulnerability (CVSS 9.8) in Ultravnc, published March 5, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.25%, the 83rd percentile. No source names a fixed version.