CVE-2020-26164

In kdeconnect-kde (aka KDE Connect) before 20.08.2, an attacker on the local network could send crafted packets that trigger use of large amounts of CPU, memory, or network connection slots, aka a Denial of Service attack.

Published: 2020-10-07 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-26164 is rated Low Risk (36.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.54%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-26164

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.08% 0.54% +0.47%
2 2025-03-17 0.05% 0.08% +0.03%
3 2023-03-07 — 0.05% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-26164

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 [email protected]
4.9 2.0 MEDIUM
AV:L/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 6.9 [email protected]

Weakness enumeration for CVE-2020-26164

OS Trackers for CVE-2020-26164

vendor priority summary link
alpine medium CVE-2020-26164: 1 source package rows (kdeconnect); 7 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2020-26164
debian not yet assigned CVE-2020-26164 not yet assigned priority: Debian including 1 source packages (kdeconnect), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-26164
gentoo normal CVE-2020-26164: 1 GLSA(s) (202101-16), 1 atom(s) (kde-misc/kdeconnect); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2020-26164
ubuntu medium CVE-2020-26164 medium priority: Ubuntu including 1 source packages (kdeconnect), 16 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 8, needed 6, DNE 1, needs-triage 1. https://ubuntu.com/security/CVE-2020-26164

Affected software / configurations for CVE-2020-26164

Vendor Product Version Raw CPE
kde kdeconnect < 20.08.2 cpe:2.3:a:kde:kdeconnect:*:*:*:*:*:*:*:*
opensuse backports_sle 15.0 cpe:2.3:a:opensuse:backports_sle:15.0:sp1:*:*:*:*:*:*
opensuse backports_sle 15.0 cpe:2.3:a:opensuse:backports_sle:15.0:sp2:*:*:*:*:*:*
opensuse leap 15.1 cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
opensuse leap 15.2 cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*

References for CVE-2020-26164

URL Tags
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00016.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00018.html Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/10/13/4 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/10/13/5 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/10/14/1 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/11/30/1 Mailing List
https://bugzilla.suse.com/show_bug.cgi?id=1176268 Issue Tracking Third Party Advisory
https://github.com/KDE/kdeconnect-kde/commit/024e5f23db8d8ad3449714b906b46094baaffb89 Patch Third Party Advisory
https://github.com/KDE/kdeconnect-kde/commit/4fbd01a3d44a0bcca888c49a77ec7cfd10e113d7 Patch Third Party Advisory
https://github.com/KDE/kdeconnect-kde/commit/542d94a70c56aa386c8d4d793481ce181b0422e8 Patch Third Party Advisory
https://github.com/KDE/kdeconnect-kde/commit/613899be24b6e2a6b3e5cc719efce8ae8a122991 Patch Third Party Advisory
https://github.com/KDE/kdeconnect-kde/commit/8112729eb0f13e6947984416118531078e65580d Patch Third Party Advisory
https://github.com/KDE/kdeconnect-kde/commit/ce0f00fc2d3eccb51d0af4eba61a4f60de086a59 Patch Third Party Advisory
https://github.com/KDE/kdeconnect-kde/releases Release Notes Third Party Advisory
https://kde.org/info/security/advisory-20201002-1.txt Third Party Advisory Vendor Advisory
https://kdeconnect.kde.org/official/ Product
https://lists.opensuse.org/opensuse-security-announce/2020-10/msg00014.html Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202101-16 Third Party Advisory
cvelogic Threat Intelligence