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CVE-2019-8265

25
FAUCET Score

CVE-2019-8265 describes multiple out-of-bounds access vulnerabilities in UltraVNC revision 1207, specifically within the VNC client code due to improper usage of the SETPIXELS macro. These critical vulnerabilities, affecting UltraVNC products, are remotely exploitable over a network without user interaction, carrying a CVSS score of 9.8. Successful exploitation could lead to arbitrary code execution, resulting in complete compromise of confidentiality, integrity, and availability. While the vulnerability has been patched in revision 1208, there is no public exploit code available in common repositories like Metasploit or ExploitDB, and it is not listed on the CISA KEV catalog, suggesting no active widespread exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.2.2.3CPE matchmatch criteria
cpe:2.3:a:uvnc:ultravnc:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.14%
Probability of exploitation in next 30 days
EPSS Percentile
86.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0314 is in the 78th percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cert-portal.siemens.com / productcert/pdf/ssa-286838.pdf
cert-portal.siemens.com / productcert/pdf/ssa-927095.pdf
cert-portal.siemens.com / productcert/pdf/ssa-940818.pdf
ics-cert.kaspersky.com / advisories/klcert-advisories/2019/03/01/klcert-19-012-ultravnc-access-of-memory-location-after-end-of-buffer
Third Party Advisory
us-cert.cisa.gov / ics/advisories/icsa-21-131-11
us-cert.gov / ics/advisories/icsa-20-161-06