CVE catalog

CVE-2019-15680

libvncserver: CVE-2019-15680

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
Published: Oct 29, 2019, 7:15:18 PM UTC
Source: [NVD] · [CVE record]
EPSS: 2.67% · Oct 25, 2026

TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which results Denial of System (DoS). This attack appear to be exploitable via network connectivity.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	tightvnc	sid	`1:1.3.10-11`	fixed
Debian	tightvnc	forky	`1:1.3.10-11`	fixed
Debian	tightvnc	trixie	`1:1.3.10-9`	fixed
Debian	tightvnc	bookworm	`1:1.3.10-7`	fixed
Debian	libvncserver	sid	`0.9.15+dfsg-6`	vulnerable
Debian	libvncserver	forky	`0.9.15+dfsg-6`	vulnerable
Debian	libvncserver	trixie	`0.9.15+dfsg-1+deb13u2`	vulnerable
Debian	libvncserver	bookworm	`0.9.14+dfsg-1+deb12u2`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	tightvnc	source	sid	`1:1.3.9-9.1`	unimportant	Not reported	[945364]
Debian	tightvnc	source	forky	`1:1.3.9-9.1`	unimportant	Not reported	[945364]
Debian	tightvnc	source	trixie	`1:1.3.9-9.1`	unimportant	Not reported	[945364]
Debian	tightvnc	source	bookworm	`1:1.3.9-9.1`	unimportant	Not reported	[945364]
Debian	libvncserver	source	sid	`(unfixed)`	unimportant	Not reported	Not reported
Debian	libvncserver	source	forky	`(unfixed)`	unimportant	Not reported	Not reported
Debian	libvncserver	source	trixie	`(unfixed)`	unimportant	Not reported	Not reported
Debian	libvncserver	source	bookworm	`(unfixed)`	unimportant	Not reported	Not reported

[Debian bug #945364]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libvncclient1]Affected
Source package: [libvncserver]
Details (2)
- 0.9.14+dfsg-1+deb12u2 · amd64 · bookworm
  Affected
  dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
- 0.9.14+dfsg-1+deb12u2 · arm64 · bookworm
  Affected
  dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
[libvncserver1]Affected
Source package: [libvncserver]
Details (2)
- 0.9.14+dfsg-1+deb12u2 · amd64 · bookworm
  Affected
  dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
- 0.9.14+dfsg-1+deb12u2 · arm64 · bookworm
  Affected
  dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
[libvncserver-dev]Affected
Source package: [libvncserver]
Details (2)
- 0.9.14+dfsg-1+deb12u2 · amd64 · bookworm
  Affected
  dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
- 0.9.14+dfsg-1+deb12u2 · arm64 · bookworm
  Affected
  dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
[tightvncpasswd]Fixed
Source package: [tightvnc]
Details (2)
- 1:1.3.10-7 · amd64 · bookworm
  Fixed · Fixed: 1:1.3.9-9.1
  dsa · tightvnc · debian · bookworm; dsa · tightvnc · debian · 12
- 1:1.3.10-7 · arm64 · bookworm
  Fixed · Fixed: 1:1.3.9-9.1
  dsa · tightvnc · debian · bookworm; dsa · tightvnc · debian · 12
[tightvncserver]Fixed
Source package: [tightvnc]
Details (2)
- 1:1.3.10-7 · amd64 · bookworm
  Fixed · Fixed: 1:1.3.9-9.1
  dsa · tightvnc · debian · bookworm; dsa · tightvnc · debian · 12
- 1:1.3.10-7 · arm64 · bookworm
  Fixed · Fixed: 1:1.3.9-9.1
  dsa · tightvnc · debian · bookworm; dsa · tightvnc · debian · 12
[xtightvncviewer]Fixed
Source package: [tightvnc]
Details (2)
- 1:1.3.10-7 · amd64 · bookworm
  Fixed · Fixed: 1:1.3.9-9.1
  dsa · tightvnc · debian · bookworm; dsa · tightvnc · debian · 12
- 1:1.3.10-7 · arm64 · bookworm
  Fixed · Fixed: 1:1.3.9-9.1
  dsa · tightvnc · debian · bookworm; dsa · tightvnc · debian · 12

[Debian 13 (Trixie)]

[libvncclient1]Affected
Source package: [libvncserver]
Details (2)
- 0.9.15+dfsg-1+deb13u2 · amd64 · trixie
  Affected
  dsa · libvncserver · debian · 13
- 0.9.15+dfsg-1+deb13u2 · arm64 · trixie
  Affected
  dsa · libvncserver · debian · 13
[libvncserver1]Affected
Source package: [libvncserver]
Details (2)
- 0.9.15+dfsg-1+deb13u2 · amd64 · trixie
  Affected
  dsa · libvncserver · debian · 13
- 0.9.15+dfsg-1+deb13u2 · arm64 · trixie
  Affected
  dsa · libvncserver · debian · 13
[libvncserver-dev]Affected
Source package: [libvncserver]
Details (2)
- 0.9.15+dfsg-1+deb13u2 · amd64 · trixie
  Affected
  dsa · libvncserver · debian · 13
- 0.9.15+dfsg-1+deb13u2 · arm64 · trixie
  Affected
  dsa · libvncserver · debian · 13
[tightvncpasswd]Fixed
Source package: [tightvnc]
Details (2)
- 1:1.3.10-9 · amd64 · trixie
  Fixed · Fixed: 1:1.3.9-9.1
  dsa · tightvnc · debian · 13
- 1:1.3.10-9+b1 · arm64 · trixie
  Fixed · Fixed: 1:1.3.9-9.1
  dsa · tightvnc · debian · 13
[tightvncserver]Fixed
Source package: [tightvnc]
Details (2)
- 1:1.3.10-9 · amd64 · trixie
  Fixed · Fixed: 1:1.3.9-9.1
  dsa · tightvnc · debian · 13
- 1:1.3.10-9+b1 · arm64 · trixie
  Fixed · Fixed: 1:1.3.9-9.1
  dsa · tightvnc · debian · 13
[xtightvncviewer]Fixed
Source package: [tightvnc]
Details (2)
- 1:1.3.10-9 · amd64 · trixie
  Fixed · Fixed: 1:1.3.9-9.1
  dsa · tightvnc · debian · 13
- 1:1.3.10-9+b1 · arm64 · trixie
  Fixed · Fixed: 1:1.3.9-9.1
  dsa · tightvnc · debian · 13

Observed: Oct 23, 2026, 5:40:59 PM UTC

References

[CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]