Security readout for executives and security teams
CVE-2021-26085 lets an unauthenticated remote attacker read restricted resources from affected Atlassian Confluence deployments. The business concern is data exposure, not system takeover. CISA lists it in KEV, so treat remaining exposed instances as a real operational risk despite the medium CVSS score. Exposure is most likely where Confluence Server or Data Center is internet-accessible or reachable by untrusted networks and remains in the affected version ranges. Cloud products are not named in the provided sources, so they should not be assumed affected from this bundle alone. High priority for any exposed self-managed Confluence instance. The flaw is not rated critical by CVSS, but KEV status means delayed remediation leaves known-exploited data exposure risk in a collaboration platform that often stores sensitive internal material. Mitigation focus: Upgrade Confluence Server/Data Center to 7.4.10, 7.12.3, or a later fixed release.; Prioritize internet-facing and partner-accessible Confluence instances first.; Restrict external access to Confluence until affected versions are upgraded..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-425: Exact CWE lookup
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Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-26085 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://jira.atlassian.com/browse/CONFSERVER-67893CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26085CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Direct Request ('Forced Browsing')
Direct Request ('Forced Browsing') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.