CVE-2021-3100

HIGHNVD 8.88.8—

8.8

The Apache Log4j hotpatch package before log4j-cve-2021-44228-hotpatch-1.1-13 didn’t mimic the permissions of the JVM being patched, allowing it to escalate privileges.

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 10.0%
KEV: Not listed

Published

April 19, 2022

Last Modified

November 21, 2024

References (6)

psirt@paloaltonetworkshttps://alas.aws.amazon.com/AL2/ALAS-2021-1732.html
psirt@paloaltonetworkshttps://alas.aws.amazon.com/ALAS-2021-1554.html
psirt@paloaltonetworkshttps://unit42.paloaltonetworks.com/aws-log4shell-hot-patch-vulnerabilities
af854a3a-2127-422b-91ae-364da2661108https://alas.aws.amazon.com/AL2/ALAS-2021-1732.html
af854a3a-2127-422b-91ae-364da2661108https://alas.aws.amazon.com/ALAS-2021-1554.html
af854a3a-2127-422b-91ae-364da2661108https://unit42.paloaltonetworks.com/aws-log4shell-hot-patch-vulnerabilities

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 23:25 UTCEG score recompute
2026-05-25 23:25 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-3100?

CVE-2021-3100 is a high vulnerability published on April 19, 2022. The Apache Log4j hotpatch package before log4j-cve-2021-44228-hotpatch-1.1-13 didn’t mimic the permissions of the JVM being patched, allowing it to escalate privileges.

When was CVE-2021-3100 disclosed?

CVE-2021-3100 was first published in the National Vulnerability Database on April 19, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-3100 actively exploited?

CVE-2021-3100 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 10.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-3100?

CVE-2021-3100 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2021-3100?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-3100, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-3100

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-3100?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)