CVE-2023-35311 kev in the critical feed json
Microsoft Outlook Security Feature Bypass Vulnerability
published 2023-07-11 3 y ago modified 2026-10-08 32 d ago also EUVD-2023-39314
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Exploited
- added 2023-07-11
- epss
- 15.5%
- EPSS 15.5% chance of exploitation in 30 days, percentile 96%
- public exploits
- 0
- none known
Summary
Microsoft Outlook Security Feature Bypass Vulnerability
Patch / fix
cisa required action Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
- Microsoft Microsoft Outlook 2016 16.0.5404.1000
- Microsoft Microsoft Outlook 2013 15.0.5571.1000
- Microsoft Microsoft Outlook 2013 Service Pack 1 15.0.5571.1000
Timeline
- Added to CISA KEV
- Published
- CISA patch deadline
- CISA SSVC: exploitation active
Known exploited
- Added
- 3 y ago
- Patch by
- 2023-08-01 (3 y ago)
- Ransomware
- Not known
- Required action
- Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
- Vendor, product
- Microsoft, Outlook
- CISA name
- Microsoft Outlook Security Feature Bypass Vulnerability
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- no
- Technical impact
- total
- Assessed
- 21 mo ago
Exploit prediction
15.52% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected products
- Microsoft Microsoft 365 Apps for Enterprise
- Microsoft Microsoft Office LTSC 2021
- Microsoft Microsoft Office 2019
- Microsoft Microsoft Outlook 2016
- Microsoft Microsoft Outlook 2013
- Microsoft Microsoft Outlook 2013 Service Pack 1
Classification
- Weakness
-
- CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2023-35311
vendor-advisory, patch
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-35311
government-resource, us-government-resource
Sources
- CVE List CVE-2023-35311
- NVD CVE-2023-35311
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