Reference page — cumulative record through Wednesday, October 7, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2023-35311
Microsoft Outlook Security Feature Bypass Vulnerability
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N R U H H H 8.8 .1552 96.7 YES
AFFECTED
Product Versions Fixed
Microsoft 365 Apps for Enterprise 16.0.1 – —
Microsoft Office LTSC 2021 16.0.1 – —
Microsoft Office 2019 19.0.0 – —
Microsoft Outlook 2016 16.0.0.0 – —
Microsoft Outlook 2013 14.0.0 – —
Microsoft Outlook 2013 Service Pack 1 15.0.0.0 – —
TIMELINE
Jun 14 Reserved by microsoft
Jul 11 Added to CISA KEV, remediation due 2023-08-01
Jul 11 Published (CNA: microsoft)
Description
Microsoft Outlook Security Feature Bypass Vulnerability
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| June 14, 2023 | Reserved | Reserved by microsoft |
| July 11, 2023 | KEV ADDED | Added to CISA KEV, remediation due 2023-08-01 |
| July 11, 2023 | Published | Published (CNA: microsoft) |
Affected
Affected products and packages — 6 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Microsoft | Microsoft 365 Apps for Enterprise | — | 16.0.1 | — |
| Microsoft | Microsoft Office LTSC 2021 | — | 16.0.1 | — |
| Microsoft | Microsoft Office 2019 | — | 19.0.0 | — |
| Microsoft | Microsoft Outlook 2016 | — | 16.0.0.0 | — |
| Microsoft | Microsoft Outlook 2013 | — | 14.0.0 | — |
| Microsoft | Microsoft Outlook 2013 Service Pack 1 | — | 15.0.0.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2023-35311 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, October 7, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
