Is CVE-2021-44832 in the CISA KEV catalog?

No. CVE-2021-44832 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-44832?

CVE-2021-44832 has a CVSS v3 base score of 6.6 (MEDIUM).

What is the EPSS score for CVE-2021-44832?

CVE-2021-44832 has an EPSS score of 97.91% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-44832?

Upgrade apache-log4j2 on debian 11 to 2.17.1-1~deb11u1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-44832

MEDIUMEPSS 100th pctl

6.6

CVSS v3

NVD

Description

Apache Log4j2 versions 2.0-beta7 through 2.17.0 (excluding security fix releases 2.3.2 and 2.12.4) are vulnerable to a remote code execution (RCE) attack when a configuration uses a JDBC Appender with a JNDI LDAP data source URI when an attacker has control of the target LDAP server. This issue is fixed by limiting JNDI data source names to the java protocol in Log4j2 versions 2.17.1, 2.12.4, and 2.3.2.

CWE-20Improper Input Validation CWE-74Injection

How to fix

Remediation Available

apache-log4j2Debian

Fixed in:2.17.1-1~deb11u1CVE-2021-44832

Fixed in:2.17.1-1CVE-2021-44832

apache-log4j2Ubuntu

Fixed in:2.12.4-0ubuntu0.1USN-5222-1

Fixed in:2.17.1-0.20.04.1USN-5222-1

liblog4j2-javaUbuntu

Fixed in:2.12.4-0ubuntu0.1USN-5222-1

Fixed in:2.17.1-0.20.04.1USN-5222-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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 VectorNetwork

Attack ComplexityHigh

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

97.91%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

References

Patch4

Vendor Advisory1

lists.apache.org

Third-Party Advisory5

Other references2

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	Fix

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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 2026-05-29.