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TI-2019-05938 Aliases CVE-2019-8266GHSA-h88h-84v5-wrjr

Out-of-bounds read in Kaspersky Lab UltraVNC

Priority MEDIUM 47CWE-788Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

UltraVNC revision 1207 has multiple out-of-bounds access vulnerabilities connected with improper usage of ClientConnection::Copybuffer function in VNC client code, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. User interaction is required to trigger these vulnerabilities. These vulnerabilities have been fixed in revision 1208.

Why it matters now

EPSS 0.02838 86th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Kaspersky LabUltraVNC1.2.2.3—No fix listedCNA
  • UltraVNC VendorKaspersky Lab Affected 1.2.2.3 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:uvnc:ultravnc:*:*:*:*:*:*:*:*before 1.2.2.3Vulnerableuvnc
  • cpe:2.3:a:uvnc:ultravnc:*:*:*:*:*:*:*:* Versions before 1.2.2.3 Vulnerable ·uvnc

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-8266
  2. 2026-10-03 Alias added: GHSA-h88h-84v5-wrjr

References

Advisory 1

Other 2

  • TI-2005-02970 Heap-based buffer overflow in Kaspersky Antivirus (KAV) 5.0 and Kaspersky Personal… CVSS 2.0HIGH 10.0
  • TI-2004-00844 McAfee Anti-Virus Engine DATS drivers before 4398 released on Oct 13th 2004 and DATS… CVSS 2.0HIGH 7.5
  • TI-2007-00432 Heap-based buffer overflow in the arj.ppl module in the OnDemand Scanner in Kaspersky… CVSS 2.0HIGH 10.0
  • TI-2019-05946 Heap-based buffer overflow in Kaspersky Lab UltraVNC CVSS 3.1CRITICAL 9.8
  • TI-2019-05945 Heap-based buffer overflow in Kaspersky Lab UltraVNC CVSS 3.1CRITICAL 9.8
  • TI-2019-05943 Heap-based buffer overflow in Kaspersky Lab UltraVNC CVSS 3.1CRITICAL 9.8
See all 74 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences