Security News > 2024 > April > Microsoft fixes two Windows zero-days exploited in malware attacks
Microsoft has fixed two actively exploited zero-day vulnerabilities during the April 2024 Patch Tuesday, although the company failed to initially tag them as such.
"Just as we did in 2022, we immediately reported our findings to the Microsoft Security Response Center. After validating our discovery, the team at Microsoft has added the relevant files to its revocation list," Budd said.
The second zero-day silently patched today by Microsoft is tracked as CVE-2024-29988 and described as a SmartScreen prompt security feature bypass vulnerability caused by a protection mechanism failure weakness.
CVE-2024-21412 was itself a bypass for another Defender SmartScreen vulnerability tracked as CVE-2023-36025, patched during the November 2023 Patch Tuesday and exploited as a zero-day to drop Phemedrone malware.
Today, Microsoft released security updates for 150 vulnerabilities as part of April 2024's Patch Tuesday, 67 of which were remote code execution bugs.
Microsoft fixes Windows Sysprep issue behind 0x80073cf2 errors.
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Related Vulnerability
| DATE | CVE | VULNERABILITY TITLE | RISK |
|---|---|---|---|
| 2024-04-09 | CVE-2024-29988 | SmartScreen Prompt Security Feature Bypass Vulnerability network low complexity | 8.8 |
| 2024-02-13 | CVE-2024-21412 | Unspecified vulnerability in Microsoft products Internet Shortcut Files Security Feature Bypass Vulnerability | 8.1 |
| 2023-11-14 | CVE-2023-36025 | Unspecified vulnerability in Microsoft products Windows SmartScreen Security Feature Bypass Vulnerability | 8.8 |