Is CVE-2021-26086 actively exploited?

Yes. CVE-2021-26086 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-26086 be exploited remotely?

The attack vector of CVE-2021-26086 has not been classified yet.

What is the CVSS score of CVE-2021-26086?

CVE-2021-26086 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-26086

HIGHCISA KEVIN THE WILD

CVE-2021-26086

Published: November 12, 2024

EPSS:94.19%probability of exploitation in 30 daysPercentile:99.9th

Official Description

Atlassian Jira Server and Data Center contain a path traversal vulnerability that allows a remote attacker to read particular files in the /WEB-INF/web.xml endpoint.

NVD Source

CISA KEV Advisory

Atlassian Jira Server and Data Center Path Traversal Vulnerability

Atlassian Jira Server and Data Center contain a path traversal vulnerability that allows a remote attacker to read particular files in the /WEB-INF/web.xml endpoint.

Added to KEV: 2024-11-12Federal patch deadline: 2024-12-03

Required Action (CISA)

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Risk Analysis

Atlassian Jira Server and Data Center contain a path traversal vulnerability that allows a remote attacker to read specific files, such as /WEB-INF/web.xml. With an EPSS score of 0.94189 and confirmed exploitation in the wild, this is an urgent vulnerability.

This vulnerability is actively exploited in the wild. The path traversal flaw is remotely exploitable, allowing attackers to read sensitive files.

Recommended Action

Apply the latest security updates and patches for Atlassian Jira Server and Data Center. Review and restrict access to Jira instances to prevent unauthorized file access.

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-2021-26086 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-2021-26086 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.