CVE catalog

CVE-2021-32728

nextcloud-desktop: CVE-2021-32728

Severity: Medium
Published: Aug 18, 2021, 4:15:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.85% · Oct 25, 2026

The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. Clients using the Nextcloud end-to-end encryption feature download the public and private key via an API endpoint. In versions prior to 3.3.0, the Nextcloud Desktop client fails to check if a private key belongs to previously downloaded public certificate. If the Nextcloud instance serves a malicious public key, the data would be encrypted for this key and thus could be accessible to a malicious actor. This issue is fixed in Nextcloud Desktop Client version 3.3.0. There are no known workarounds aside from upgrading.

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	nextcloud-desktop	sid	`35.0.0-1`	fixed
Debian	nextcloud-desktop	forky	`35.0.0-1`	fixed
Debian	nextcloud-desktop	trixie	`3.16.7-1~deb13u1`	fixed
Debian	nextcloud-desktop	bookworm	`3.7.3-1+deb12u2`	fixed
Ubuntu	nextcloud-desktop	20.04	`2.5.3-1`	vulnerable
Ubuntu	nextcloud-desktop	20.04	`2.6.0-1`	vulnerable
Ubuntu	nextcloud-desktop	20.04	`2.6.1-1`	vulnerable
Ubuntu	nextcloud-desktop	20.04	`2.6.1-2`	vulnerable
Ubuntu	nextcloud-desktop	20.04	`2.6.2-1`	vulnerable
Ubuntu	nextcloud-desktop	20.04	`2.6.2-1build1`	vulnerable
Ubuntu	nextcloud-desktop	22.04	`3.2.3-0ubuntu1`	vulnerable
Ubuntu	nextcloud-desktop	22.04	`3.3.5-1`	vulnerable
Ubuntu	nextcloud-desktop	22.04	`3.3.5-1ubuntu1`	vulnerable
Ubuntu	nextcloud-desktop	22.04	`3.4.2-1`	vulnerable
Ubuntu	nextcloud-desktop	22.04	`3.4.2-1ubuntu1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	nextcloud-desktop	source	sid	`3.3.1-1`	not yet assigned	Not reported	Not reported
Debian	nextcloud-desktop	source	forky	`3.3.1-1`	not yet assigned	Not reported	Not reported
Debian	nextcloud-desktop	source	trixie	`3.3.1-1`	not yet assigned	Not reported	Not reported
Debian	nextcloud-desktop	source	bookworm	`3.3.1-1`	not yet assigned	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[caja-nextcloud]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.7.3-1+deb12u2 · all · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
- 3.7.3-1+deb12u2 · all · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
[dolphin-nextcloud]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.7.3-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
- 3.7.3-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
[libnextcloudsync0]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.7.3-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
- 3.7.3-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
[libnextcloudsync-dev]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.7.3-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
- 3.7.3-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
[nautilus-nextcloud]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.7.3-1+deb12u2 · all · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
- 3.7.3-1+deb12u2 · all · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
[nemo-nextcloud]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.7.3-1+deb12u2 · all · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
- 3.7.3-1+deb12u2 · all · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
[nextcloud-desktop]Fixed
Details (2)
- 3.7.3-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
- 3.7.3-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
[nextcloud-desktop-cmd]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.7.3-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
- 3.7.3-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
[nextcloud-desktop-common]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.7.3-1+deb12u2 · all · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
- 3.7.3-1+deb12u2 · all · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
[nextcloud-desktop-doc]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.7.3-1+deb12u2 · all · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
- 3.7.3-1+deb12u2 · all · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
[nextcloud-desktop-l10n]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.7.3-1+deb12u2 · all · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12
- 3.7.3-1+deb12u2 · all · bookworm
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · bookworm; dsa · nextcloud-desktop · debian · 12

[Debian 13 (Trixie)]

[caja-nextcloud]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.16.7-1~deb13u1 · all · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
- 3.16.7-1~deb13u1 · all · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
[dolphin-nextcloud]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.16.7-1~deb13u1 · amd64 · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
- 3.16.7-1~deb13u1 · arm64 · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
[libnextcloudsync0t64]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.16.7-1~deb13u1 · amd64 · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
- 3.16.7-1~deb13u1 · arm64 · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
[libnextcloudsync-dev]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.16.7-1~deb13u1 · amd64 · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
- 3.16.7-1~deb13u1 · arm64 · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
[nautilus-nextcloud]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.16.7-1~deb13u1 · all · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
- 3.16.7-1~deb13u1 · all · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
[nemo-nextcloud]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.16.7-1~deb13u1 · all · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
- 3.16.7-1~deb13u1 · all · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
[nextcloud-desktop]Fixed
Details (2)
- 3.16.7-1~deb13u1 · amd64 · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
- 3.16.7-1~deb13u1 · arm64 · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
[nextcloud-desktop-cmd]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.16.7-1~deb13u1 · amd64 · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
- 3.16.7-1~deb13u1 · arm64 · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
[nextcloud-desktop-common]Fixed
Source package: [nextcloud-desktop]
Details (2)
- 3.16.7-1~deb13u1 · all · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13
- 3.16.7-1~deb13u1 · all · trixie
  Fixed · Fixed: 3.3.1-1
  dsa · nextcloud-desktop · debian · 13

Next results

Observed: Oct 23, 2026, 5:57:34 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]