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Fencer Intel
critical 9.8

CVE-2019-15679 in the critical feed json

TightVNC code version 1.3.10 contains heap buffer overflow in InitialiseRFBConnection function, which can potentially result code execution.

published 7y ago modified 4mo ago also EUVD-2019-6618

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
11.8%
EPSS 11.8% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

TightVNC code version 1.3.10 contains heap buffer overflow in InitialiseRFBConnection function, which can potentially result code execution. This attack appear to be exploitable via network connectivity.

Patch / fix

  • tightvnc Debian 14, Debian 13, Debian 12 1:1.3.9-9.1

debian advisories DEBIAN-CVE-2019-15679

  • tightvnc Ubuntu Pro 14.04 LTS 1.3.9-6.5+deb8u1build0.14.04.1~esm1

ubuntu advisories UBUNTU-CVE-2019-15679

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • tightvnc SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 1.3.9-81.15.3.1

suse advisories SUSE-SU-2019:14235-1

Is CVE-2019-15679 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-20-343-08 updated cvss 9.8

Siemens Products using TightVNC (Update A)

  • Siemens SIMATIC HMI Comfort Outdoor Panels 7" & 15" (incl. SIPLUS variants) Siemens SIMATIC HMI Comfort Panels 4" - 22" (incl. SIPLUS variants) Siemens SIMATIC HMI KTP Mobile Panels KTP400F, KTP700, KTP700F, KTP900 and KTP900F Siemens SIMATIC ITC1500 V3.1 Siemens SIMATIC ITC1500 V3.1 PRO Siemens SIMATIC ITC1900 V3.1
    +5 more products
    Siemens SIMATIC ITC1900 V3.1 PRO Siemens SIMATIC ITC2200 V3.1 Siemens SIMATIC ITC2200 V3.1 PRO Siemens SIMATIC WinCC Runtime Advanced Siemens SIMATIC WinCC Runtime Professional
    affected: vendor fix

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

11.84% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Kaspersky TightVNC

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.