Is CVE-2020-14346 in the CISA KEV catalog?

No. CVE-2020-14346 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-14346?

CVE-2020-14346 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2020-14346?

CVE-2020-14346 has an EPSS score of 0.63% (46th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-14346?

Upgrade xorg-server on debian 11 to 2:1.20.9-1 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2020-14346

HIGH

7.8

CVSS v3

NVD

Description

A flaw was found in xorg-x11-server before 1.20.9. An integer underflow in the X input extension protocol decoding in the X server may lead to arbitrary access of memory contents. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CWE-191

How to fix

Remediation Available

xorg-serverDebian

Fixed in:2:1.20.9-1CVE-2020-14346

xorg-serverUbuntu

Fixed in:2:1.15.1-0ubuntu2.11+esm2USN-4488-2

Fixed in:2:1.18.4-0ubuntu0.9USN-4488-1

Fixed in:2:1.19.6-1ubuntu4.5USN-4488-1

Fixed in:2:1.20.8-2ubuntu2.3USN-4488-1

xorg-server-hwe-16.04Ubuntu

Fixed in:2:1.19.6-1ubuntu4.1~16.04.3USN-4488-1

xorg-server-hwe-18.04Ubuntu

Fixed in:2:1.20.8-2ubuntu2.2~18.04.2USN-4488-1

xserver-xorg-coreUbuntu

Fixed in:2:1.15.1-0ubuntu2.11+esm2USN-4488-2

Fixed in:2:1.18.4-0ubuntu0.9USN-4488-1

Fixed in:2:1.19.6-1ubuntu4.5USN-4488-1

Fixed in:2:1.20.8-2ubuntu2.3USN-4488-1

xserver-xorg-core-hwe-16.04Ubuntu

Fixed in:2:1.19.6-1ubuntu4.1~16.04.3USN-4488-1

xserver-xorg-core-hwe-18.04Ubuntu

Fixed in:2:1.20.8-2ubuntu2.2~18.04.2USN-4488-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.63%probability of exploitation in 30 days

46thpercentile

Moderate risk: more likely to be exploited than 46% of all known CVEs.

References

Patch1

lists.x.org

Third-Party Advisory4

Related Vulnerabilities

Other CWE-191 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0497	Critical	9.8	100%	KEV	Fix
CVE-2020-36221	High	7.5	84%	-	Fix
CVE-2020-36228	High	7.5	83%	-	Fix
CVE-2023-31102	High	7.8	71%	-	Fix
CVE-2024-38063	Critical	9.8	71%	-	Fix
CVE-2017-14496	High	7.5	66%	-	Fix

Embed a live status badge for CVE-2020-14346

Markdown

[![CVE-2020-14346](https://tridentstack.com/cve/badge/CVE-2020-14346.svg)](https://tridentstack.com/cve/CVE-2020-14346)

HTML

<a href="https://tridentstack.com/cve/CVE-2020-14346"><img src="https://tridentstack.com/cve/badge/CVE-2020-14346.svg" alt="CVE-2020-14346"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-08-29.