CVE & CISA-KEV CatalogNVD
CVE-2026-48579
CRITICAL9.1
CVSS v3
Description
Improper authorization in Microsoft Exchange Online allows an unauthorized attacker to disclose information over a network.
CVSS v3 Vector
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
Exploit Intelligence
1.01%probability of exploitation in 30 days
59thpercentile
Moderate risk: more likely to be exploited than 59% of all known CVEs.
References
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Start freeThis 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 2026-06-05.