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01 Record

CVE-2019-8266

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

UnratedPUBLISHEDCNA: Kaspersky
CNA base scoreUnratedNo CNA CVSS vector
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02 Description

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

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
2.83% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 86.5% of scored records. A rank, not a probability.
NVD base score
9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2019-03-09 00:00Z7 YR AGO
Last updated
2024-09-16 23:05Z2 YR AGO
Reserved
2019-02-12
Assigning CNA
Kaspersky
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
  • CWE-788Access of Memory Location After End of BufferBase
  • CWE-125Out-of-bounds ReadBase
  • CWE-787Out-of-bounds WriteBase
Data version
5.1
Document digest
45e235bddd08c75fbe1501f179462f72db1419c8f72d1e831204b0de8129e4e1

05 Affected products

VendorProductVersionsPlatforms
Kaspersky LabUltraVNC1.2.2.3—

06 References