by Kastro
Paper/Archive/CVE-2026-48579

CVE-2026-48579

Microsoft Microsoft Exchange Online — Microsoft Exchange Online Information Disclosure Vulnerability

EPSS 1%CVSS 9.1
critical.is priorityof 100
40
CVSS 9.1 (CNA)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 63.3.633 × 2012.7No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Improper authorization in Microsoft Exchange Online allows an unauthorized attacker to disclose information over a network.

Affected

ProductAffectedFixed inSource
Microsoft Exchange Online-–CNA

Scores by source

microsoft (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

patchmsrc.microsoft.com/update-guide/vulnerability/CVE-2026-48579