THREATPORT/VULNERABILITY/CVE-2019-8265
CRITICAL SEVERITY

CVE-2019-8265

Ultravnc vulnerability

CVSS
9.8
EPSS
3.1%
EPSS pct
87th
Exploited
No known
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.
Affected vendor
Uvnc
Affected product
Ultravnc
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
Published
2019-03-08

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.1% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2019-8265

  • Confirm whether Uvnc Ultravnc is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2019-8265.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-8265

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-8265 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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