CVE-2023-35311
KEVMicrosoft Outlook Security Feature Bypass Vulnerability
Description
Microsoft Outlook contains a security feature bypass vulnerability that allows an attacker to bypass the Microsoft Outlook Security Notice prompt.
Microsoft Outlook Security Feature Bypass Vulnerability
CVSS 3.1 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HPublishedJul 11, 2023
Last modifiedOct 8, 2026
Added to KEVJul 11, 2023
Remediation dueAug 1, 2023
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35311PatchVendor Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-35311US Government Resource
0 recent articles mention this CVE
76
Risk assessment · High
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1182 days
- CVSS
- 8.8 HIGH
- EPSS (30-day exploit probability)
- 15.5% · top 3% of all CVEs
- Weakness
- CWE-367
- Attack vector
- Network, remotely reachable
Recommended actions
- 1.Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.