CVE-2026-48582
Microsoft Exchange Online Elevation of Privilege Vulnerability
Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Microsoft Exchange Online Elevation of Privilege Vulnerability
Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
- Record
CVE-2026-48582- CVSS 3.1
- 9.6 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C - Weakness
- CWE-862
- Updated
- 2026-11-02
EUVDEUVD-2026-38090
Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
- Record
EUVD-2026-38090- CVSS 3.1
- 9.6 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-j97v-rpjv-q4wf
Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate...
Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
- Record
GHSA-j97v-rpjv-q4wf- CVSS 3.1
- 9.6 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N - Weakness
- CWE-862
- Updated
- 2026-11-02
NVD
Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
- Record
CVE-2026-48582- CVSS 3.1
- 9.6 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N - Weakness
- CWE-862
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-48582 is a critical vulnerability (CVSS 9.6) in Microsoft Exchange Online, published June 19, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.69%, the 52nd percentile. No source names a fixed version.