CVE-2019-8265
CRITICALEPSS 87th pctlDescription
UltraVNC revision 1207 has multiple out-of-bounds access vulnerabilities connected with improper usage of SETPIXELS macro in VNC client code, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1208.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Elevated risk: more likely to be exploited than 87% of all known CVEs.
References
Related Vulnerabilities
Other CWE-788 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2020-9731 | High | 7.8 | 11% | - | - |
| CVE-2021-21105 | High | 8.8 | 5.9% | - | - |
| CVE-2021-21104 | High | 8.8 | 4.9% | - | - |
| CVE-2021-21082 | High | 7.8 | 4.5% | - | - |
| CVE-2019-8280 | Critical | 9.8 | 4.2% | - | Fix |
| CVE-2021-21093 | High | 7.8 | 3.9% | - | - |
Common questions
How do I fix CVE-2019-8265?
Upgrade ultravnc to 1.2.2.3 or later.
Is CVE-2019-8265 being actively exploited?
Not that we know of. CVE-2019-8265 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 3.1% is the estimated probability that it will be exploited in the next 30 days. That is higher than 87% of all scored CVEs.
How severe is CVE-2019-8265?
CVE-2019-8265 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2019-8265 affect?
Published advisories record a fix for ultravnc (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.