Is CVE-2021-45046 actively exploited?

Yes. CVE-2021-45046 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-45046 be exploited remotely?

The attack vector of CVE-2021-45046 has not been classified yet.

What is the CVSS score of CVE-2021-45046?

CVE-2021-45046 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-45046

HIGHCISA KEVIN THE WILD

CVE-2021-45046

Published: May 1, 2023

EPSS:94.34%probability of exploitation in 30 daysPercentile:100.0th

Official Description

Apache Log4j2 contains a deserialization of untrusted data vulnerability due to the incomplete fix of CVE-2021-44228, where the Thread Context Lookup Pattern is vulnerable to remote code execution in certain non-default configurations.

NVD Source

CISA KEV Advisory

Apache Log4j2 Deserialization of Untrusted Data Vulnerability

Added to KEV: 2023-05-01Federal patch deadline: 2023-05-22⚠ USED IN RANSOMWARE CAMPAIGNS

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

Apache Log4j2 has a deserialization vulnerability that can lead to remote code execution in specific non-default configurations, stemming from an incomplete fix for a previous vulnerability. With an EPSS score of 0.94340, there is a very high likelihood of exploitation, making this a severe risk. This vulnerability is confirmed as exploited by CISA.

This vulnerability is actively exploited in the wild and is present in CISA's KEV catalog. The nature of remote code execution in certain configurations indicates it is remotely exploitable.

Recommended Action

Update Apache Log4j2 to a patched version immediately. Review and adjust any non-default configurations to mitigate the risk of deserialization of untrusted data.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-45046 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-45046 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.