CVE-2026-118154
Microsoft Exchange Server Elevation of Privilege Vulnerability
CVE-2026-118154 is a high vulnerability (CVSS 8.8) in Microsoft Exchange Server Subscription Edition Rtm, published November 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.03%, the 64th percentile. No source names a fixed version.
- Severity
- 8.8 HighCVSS 3.1, CVE List
- Exploit chance
- 1.03%EPSS, 64th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
Reliance on untrusted inputs in a security decision in Microsoft Exchange Server 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
- High
Exploit likelihood
Affected products
What each source reports
CVE List Score used
Microsoft Exchange Server Elevation of Privilege Vulnerability
Reliance on untrusted inputs in a security decision in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
- Record
CVE-2026-118154- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-807
- Updated
- 2026-11-10
EUVDEUVD-2026-122245
Reliance on untrusted inputs in a security decision in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
- Record
EUVD-2026-122245- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-10
GitHub AdvisoriesGHSA-gc6f-jf56-4wxq
Reliance on untrusted inputs in a security decision in Microsoft Exchange Server allows an...
Reliance on untrusted inputs in a security decision in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
- Record
GHSA-gc6f-jf56-4wxq- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-807
- Updated
- 2026-11-10
NVD
Reliance on untrusted inputs in a security decision in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
- Record
CVE-2026-118154- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-807
- Updated
- 2026-11-10
History
| Recorded | Changed | Sources |
|---|---|---|
| published | EUVD | |
| published | EUVD, NVD | |
| aliases, references | GitHub Advisories | |
| cwes, references, severity, title | CVE List | |
| first indexed | EUVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.