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CVE-2019-8280

25
FAUCET Score

CVE-2019-8280 describes an out-of-bounds access vulnerability within the VNC client's RAW decoder in UltraVNC revision 1203, potentially leading to remote code execution. This critical vulnerability, with a CVSS score of 9.8, is exploitable over the network without user interaction, allowing for complete compromise of confidentiality, integrity, and availability. While it has a high FAUCET Risk Score of 81/100, there is no evidence of active exploitation, and no public exploit code is available in Metasploit, Nuclei, or ExploitDB. The vulnerability has received limited community discussion and media coverage, with a fix available in UltraVNC revision 1204.

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
4.25%
Probability of exploitation in next 30 days
EPSS Percentile
90.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0425 is in the 83rd 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-19-009-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