Critical auth-bypass in Microsoft Fabric (widely used enterprise cloud service) with CVSS 10.0 enabling remote privilege escalation; high-impact, broadly relevant to IT orgs.
CVE-2026-69843
Authentication bypass in Microsoft Fabric enabling remote privilege escalation.
Is CVE-2026-69843 being exploited?
Not confirmed. CVE-2026-69843 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.90% probability of exploitation in the next 30 days.
How severe is CVE-2026-69843?
CVE-2026-69843 is rated Critical with a CVSS score of 10.0. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-69843?
Yes. A fix has been recorded for CVE-2026-69843. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-69843 affect?
CVE-2026-69843 affects Microsoft Fabric (cloud analytics service), Fabric control/admin endpoints, Fabric tenant environments. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-69843?
Apply Microsoft's Fabric security update immediately; restrict access and monitor logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote authentication bypass via spoofing allows attackers to escalate to admin, access/modify data, and perform admin actions across Fabric.
Immediate action required
cisa ssvc
- exploitation
- none
- automatable
- yes
- technical impact
- total
Assessed by CISA 18 Sept 2026 (SSVC 2.0.3).
timeline
- 17 Sept 2026Published
- 18 Sept 2026CISA SSVC assessment: exploitation none · same day later
- 19 Sept 2026Analysed by vulneraibility.com · 1 day later
- 31 Oct 2026CVE record last updated · 42 days later
- Patchmsrc.microsoft.com /update-guide/vulnerability/CVE-2026-69843
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.