PT-2026-51033 · Microsoft · Exchange Online

Henrique Pereira · Published 2026-06-19 · Updated 2026-06-19 · CVE-2026-48582

Positive Technologies (AI Summary)

CVSS v3.1

9.6

Critical

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions Microsoft Exchange Online (affected versions not specified)

Description Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network. There have been reports of elevated activities targeting this issue.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-48582

Affected Products

Exchange Online

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-48582 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48582 · Vendor Advisory
• https://twitter.com/CVEnew/status/2068087565312266379 · Twitter Post
• https://twitter.com/vuldb/status/2068094873304195144 · Twitter Post