CVE-2026-124227
Microsoft Office Outlook Remote Code Execution Vulnerability
CVE-2026-124227 is a high vulnerability (CVSS 7.5) in Microsoft 365 Apps For Enterprise, published November 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.48%, the 41st percentile. No source names a fixed version.
- Severity
- 7.5 HighCVSS 3.1, CVE List
- Exploit chance
- 0.48%EPSS, 41st percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
Use of uninitialized resource in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
Affected products
What each source reports
CVE List Score used
Microsoft Office Outlook Remote Code Execution Vulnerability
Use of uninitialized resource in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
- Record
CVE-2026-124227- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-908
- Updated
- 2026-11-10
EUVDEUVD-2026-122270
Use of uninitialized resource in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
- Record
EUVD-2026-122270- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-11
GitHub AdvisoriesGHSA-6475-4gm5-f8x6
Use of uninitialized resource in Microsoft Office Outlook allows an unauthorized attacker to...
Use of uninitialized resource in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
- Record
GHSA-6475-4gm5-f8x6- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-908
- Updated
- 2026-11-10
NVD
Use of uninitialized resource in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
- Record
CVE-2026-124227- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-908
- Updated
- 2026-11-11
History
| Recorded | Changed | Sources |
|---|---|---|
| published | EUVD, NVD | |
| 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.