Is CVE-2021-26085 in the CISA KEV catalog?

Yes. CVE-2021-26085 is on the CISA Known Exploited Vulnerabilities list, added 2022-03-28, and has known ransomware campaign use.

What is the CVSS severity of CVE-2021-26085?

CVE-2021-26085 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2021-26085?

CVE-2021-26085 has an EPSS score of 99.94% (100th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2021-26085

MEDIUMCISA KEVEPSS 100th pctl

5.3

CVSS v3

NVD

Description

Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read vulnerability in the /s/ endpoint. The affected versions are before version 7.4.10, and from version 7.5.0 before 7.12.3.

CWE-425

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

99.94%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability

Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a pre-authorization arbitrary file read vulnerability in the /s/ endpoint.

Apply updates per vendor instructions.

Remediation due: 2022-04-18

Associated with ransomware campaigns

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-24.