Is CVE-2021-42013 actively exploited?

Yes. CVE-2021-42013 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-42013 be exploited remotely?

The attack vector of CVE-2021-42013 has not been classified yet.

What is the CVSS score of CVE-2021-42013?

CVE-2021-42013 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-42013

HIGHCISA KEVIN THE WILD

CVE-2021-42013

Published: November 3, 2021

EPSS:94.41%probability of exploitation in 30 daysPercentile:100.0th

Official Description

Apache HTTP Server contains a path traversal vulnerability that allows an attacker to perform remote code execution if files outside directories configured by Alias-like directives are not under default require all denied or if CGI scripts are enabled. This CVE ID resolves an incomplete patch for CVE-2021-41773.

NVD Source

CISA KEV Advisory

Apache HTTP Server Path Traversal Vulnerability

Added to KEV: 2021-11-03Federal patch deadline: 2021-11-17⚠ USED IN RANSOMWARE CAMPAIGNS

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

Apache HTTP Server is affected by a path traversal vulnerability that can lead to remote code execution under specific configurations. This flaw is an incomplete patch for a previous vulnerability (CVE-2021-41773), and its high EPSS score of 0.94410 indicates a very high likelihood of exploitation.

This vulnerability is actively exploited in the wild and is included in CISA's KEV catalog, confirming its confirmed exploitation. The remote code execution capability makes it highly dangerous.

Recommended Action

Apply the latest security patches for Apache HTTP Server. Ensure that directories configured by Alias-like directives are under 'require all denied' by default and review CGI script configurations.

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-2021-42013 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-2021-42013 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.