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CVE-2019-15690

25
FAUCET Score

CVE-2019-15690 is a heap buffer overflow vulnerability in LibVNCServer versions 0.9.12 and earlier, specifically within the HandleCursorShape() function in libvncclient/cursor.c. An unauthenticated attacker can exploit this by sending specially crafted cursor shapes, potentially leading to remote code execution. This vulnerability carries a high CVSS score of 8.8, indicating a severe risk with high impact on confidentiality, integrity, and availability, requiring user interaction. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.9.12CPE match
cpe:2.3:a:libvnc_project:libvncserver:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.75%
Probability of exploitation in next 30 days
EPSS Percentile
51.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0075 is in the 53rd percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libvncserver-0:0.9.9-14.el7_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: libvncserver-0:0.9.11-9.el8_1.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.0 Update Services for SAP SolutionsFixed in: libvncserver-0:0.9.11-9.el8_0.2
View patch

Vendor Advisories (1)

redhatCVE-2019-15690Important

libvncserver: HandleCursorShape() integer overflow resulting in heap-based buffer overflow

Dec 20, 2019

References

ics-cert.kaspersky.com / vulnerabilities/klcert-20-009-remote-code-execution-on-libvnc-version-prior-to-0-9-12