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CVE-2019-15678

36
FAUCET Score

CVE-2019-15678 is a critical heap buffer overflow vulnerability in TightVNC version 1.3.10, specifically within the rfbServerCutText handler. This flaw allows for potential remote code execution, affecting TightVNC products. With a CVSS score of 9.8, it is highly severe, requiring no user interaction or authentication and exploitable over the network. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, indicating high awareness.

Impacted Technologies

VendorProductVersion(s)CPE
1.3.10CPE matchmatch criteria
cpe:2.3:a:tightvnc:tightvnc:1.3.10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
12.16%
Probability of exploitation in next 30 days
EPSS Percentile
95.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.1216 is in the 92nd percentile among its peer group of 36,835 CVEs.

Social Chatter

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-478893.pdf
lists.debian.org / debian-lts-announce/2019/12/msg00028.html
us-cert.cisa.gov / ics/advisories/icsa-20-343-08
openwall.com / lists/oss-security/2018/12/10/5
Mailing ListThird Party Advisory