CVEs / CVE-2023-35311
CVE-2023-35311: Microsoft Outlook Security Feature Bypass Vulnerability
- Known exploited in the CISA KEV catalog since 11 Jul 2023
- high 8.8 CVSS 3.1 (from the CNA)
- EPSS 15.5% chance of exploitation in the next 30 days, higher than 96% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Microsoft Outlook contains a security feature bypass vulnerability that allows an attacker to bypass the Microsoft Outlook Security Notice prompt.
Description
Microsoft Outlook Security Feature Bypass Vulnerability
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Microsoft 365 Apps for Enterprise | from 16.0.1, before https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| Microsoft Microsoft Office LTSC 2021 | from 16.0.1, before https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| Microsoft Microsoft Office 2019 | from 19.0.0, before https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| Microsoft Microsoft Outlook 2016 | from 16.0.0.0, before 16.0.5404.1000 | 16.0.5404.1000 |
| Microsoft Microsoft Outlook 2013 | from 14.0.0, before 15.0.5571.1000 | 15.0.5571.1000 |
| Microsoft Microsoft Outlook 2013 Service Pack 1 | from 15.0.0.0, before 15.0.5571.1000 | 15.0.5571.1000 |
Exploitation
| In CISA KEV since | 11 Jul 2023 |
|---|---|
| Due date for US federal agencies | 1 Aug 2023 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions or discontinue use of the product if updates are unavailable. |
Severity
| CVSS 3.1 | 8.8 highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-367 |
References
- CVE-2023-35311 on NVD
- CVE-2023-35311 in the CISA KEV catalog
- https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2023-35311 (cited by CISA)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35311 Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-35311 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.