SEPTEMBER 7, 2026
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Case File

CVE-2026-21577

MEDIUM · CVSS 6.5 EPSS 0.24%

Source: NVD + CISA KEV + EPSS · Published 2026-07-21 · Last synced 2026-08-20

CyberRota Analysis

AI-Generated

This Denial of Service vulnerability affects multiple versions of Confluence Data Center, allowing authenticated attackers to disrupt service availability for users. Organizations using the specified versions should prioritize upgrading to the latest release or to the recommended fixed versions (9.2.17 or 10.2.7) to mitigate potential service interruptions. Immediate action is advised for all Confluence Data Center customers to ensure continued service reliability.

CVE
CVE-2026-21577
Severity
MEDIUM
CVSS
6.5
EPSS
0.24%

Original NVD Description

This High severity DoS (Denial of Service) vulnerability was introduced in versions 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0 and 10.2.0 of Confluence Data Center. This DoS (Denial of Service) vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to cause a resource to be unavailable for its intended users by temporarily or indefinitely disrupting services of a host connected to a network. Atlassian recommends that Confluence Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions: Confluence Data Center 9.2: Upgrade to a release greater than or equal to 9.2.17 Confluence Data Center 10.2: Upgrade to a release greater than or equal to 10.2.7 See the release notes ([https://confluence.atlassian.com/doc/confluence-release-notes-327.html]). You can download the latest version of Confluence Data Center from the download center ([https://www.atlassian.com/software/confluence/download-archives]). This vulnerability was reported via our Penetration Testing program.

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