CVE-2026-118208
Microsoft Exchange Server Spoofing Vulnerability
CVE-2026-118208 is a high vulnerability (CVSS 7.1) 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 0.82%, the 57th percentile. No source names a fixed version.
- Severity
- 7.1 HighCVSS 3.1, CVE List
- Exploit chance
- 0.82%EPSS, 57th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
Improper access control in Microsoft Exchange Server allows an authorized attacker to perform spoofing 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
- None
- Integrity
- High
- Availability
- Low
Exploit likelihood
Affected products
What each source reports
CVE List Score used
Microsoft Exchange Server Spoofing Vulnerability
Improper access control in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.
- Record
CVE-2026-118208- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L/E:U/RL:O/RC:C - Weakness
- CWE-15, CWE-284
- Updated
- 2026-11-12
EUVDEUVD-2026-122248
Improper access control in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.
- Record
EUVD-2026-122248- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L/E:U/RL:O/RC:C - Updated
- 2026-11-10
GitHub AdvisoriesGHSA-r8vm-vj9h-vcpf
Improper access control in Microsoft Exchange Server allows an authorized attacker to perform...
Improper access control in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.
- Record
GHSA-r8vm-vj9h-vcpf- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L - Weakness
- CWE-15, CWE-284
- Updated
- 2026-11-12
NVD
Improper access control in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.
- Record
CVE-2026-118208- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L - Weakness
- CWE-15, CWE-284
- Updated
- 2026-11-12
History
| Recorded | Changed | Sources |
|---|---|---|
| cwes | CVE List, NVD | |
| cwes | GitHub Advisories | |
| published | EUVD | |
| published | EUVD, NVD | |
| aliases, references | GitHub Advisories | |
| references, severity, title | CVE List | |
| first indexed | EUVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.