CVE-2023-35311

Microsoft Outlook Security Feature Bypass Vulnerability

CVE-2023-35311 is fixed in 5 products on 1 platform, first by KB5002432, released July 11, 2023. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on July 11, 2023. Patch Radar priority: Patch now.

Patch nowCISA KEV

CVSS

8.8

Important

Exploitation

Exploited

Reported by the vendor

CISA KEV

Jul 11, 2023

Federal due date Aug 1, 2023

EPSS

0.1552

96th percentile

Where it's fixed

Product	Fix	Released
Microsoft
Microsoft Outlook 2013 (32-bit editions)	KB5002432	Jul 11, 2023
Microsoft Outlook 2013 (64-bit editions)	KB5002432	Jul 11, 2023
Microsoft Outlook 2013 RT Service Pack 1	KB5002432	Jul 11, 2023
Microsoft Outlook 2016 (32-bit edition)	KB5002427	Jul 11, 2023
Microsoft Outlook 2016 (64-bit edition)	KB5002427	Jul 11, 2023

Details

Published
July 11, 2023
Weakness
Time-of-check Time-of-use (TOCTOU) Race Condition
CISA required action
Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35311

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