VulnerabilityAnalyzed
CVE-2023-35311
Microsoft Outlook Security Feature Bypass Vulnerability
KEVHIGH 8.8EPSS 15.5%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 1 August 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Microsoft Outlook Security Feature Bypass Vulnerability
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 15.52% probability · 97th percentile
- CISA KEV
- Listed 11 July 2023 · due 1 August 2023
- Weakness
- CWE-367
- Affected
- microsoft/365 apps · microsoft/office · microsoft/office long term servicing channel · microsoft/outlook
- Source
- secure@microsoft.com
CISA notes
Apply updates per vendor instructions or discontinue use of the product if updates are unavailable. https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2023-35311; https://nvd.nist.gov/vuln/detail/CVE-2023-35311
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35311Patch, Vendor Advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35311Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-35311US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.