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CVE-2019-15693

24
FAUCET Score

CVE-2019-15693 is a heap buffer overflow vulnerability affecting TigerVNC versions prior to 1.10.1, specifically within the TightDecoder::FilterGradient function. This flaw carries a high CVSS score of 7.2, indicating a critical risk due to its network-exploitable nature, low attack complexity, and potential for remote code execution with high impact on confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.10.1CPE matchmatch criteria
cpe:2.3:a:tigervnc:tigervnc:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.28%
Probability of exploitation in next 30 days
EPSS Percentile
90.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0428 is in the 88th percentile among its peer group of 5,537 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: tigervnc-0:1.8.0-21.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: tigervnc-0:1.9.0-14.el8_1
View patch

Vendor Advisories (1)

redhatCVE-2019-15693Moderate

tigervnc: Heap buffer overflow in TightDecoder::FilterGradient

Dec 20, 2019

References

lists.opensuse.org / opensuse-security-announce/2020-01/msg00039.html
Broken Link
github.com / CendioOssman/tigervnc/commit/b4ada8d0c6dac98c8b91fc64d112569a8ae5fb95
PatchThird Party Advisory
github.com / TigerVNC/tigervnc/releases/tag/v1.10.1
Release NotesThird Party Advisory
openwall.com / lists/oss-security/2019/12/20/2
ExploitMailing ListThird Party Advisory