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CVE-2024-29988

Microsoft SmartScreen Prompt Security Feature Bypass

8.8 HIGHActively exploited (CISA KEV)EPSS 44.9%
  1. Published9 Apr 2024
  2. Added to CISA KEV30 Apr 2024
  3. Remediation due21 May 2024
Actively exploited (CISA KEV)

Microsoft SmartScreen Prompt contains a security feature bypass vulnerability that allows an attacker to bypass the Mark of the Web (MotW) feature. This vulnerability can be chained with CVE-2023-38831 and CVE-2024-21412 to execute a malicious file.

Added to KEV: 30 Apr 2024Federal remediation due: 21 May 2024

Description

SmartScreen Prompt Security Feature Bypass Vulnerability

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Microsoft Windows 10 1809< 10.0.17763.5696
Microsoft Windows 10 21h2< 10.0.19044.4291
Microsoft Windows 10 22h2< 10.0.19045.4291
Microsoft Windows 11 21h2< 10.0.22000.2899
Microsoft Windows 11 22h2< 10.0.22621.3447
Microsoft Windows 11 23h2< 10.0.22631.3447
Microsoft Windows Server 2019< 10.0.17763.5696
Microsoft Windows Server 2022< 10.0.20348.2402
Microsoft Windows Server 2022 23h2< 10.0.25398.830

Remediation

Fixed in
Microsoft Windows 10 1809≥ 10.0.17763.5696
Microsoft Windows 10 21h2≥ 10.0.19044.4291
Microsoft Windows 10 22h2≥ 10.0.19045.4291
Microsoft Windows 11 21h2≥ 10.0.22000.2899
Microsoft Windows 11 22h2≥ 10.0.22621.3447
Microsoft Windows 11 23h2≥ 10.0.22631.3447
Microsoft Windows Server 2019≥ 10.0.17763.5696
Microsoft Windows Server 2022≥ 10.0.20348.2402
Microsoft Windows Server 2022 23h2≥ 10.0.25398.830

References

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Frequently asked

Is CVE-2024-29988 being actively exploited?

Yes. CVE-2024-29988 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 30 Apr 2024.

How severe is CVE-2024-29988?

CVE-2024-29988 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 44.9% probability of exploitation.

Which products are affected by CVE-2024-29988?

Affected products include Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 21h2, Microsoft Windows 11 22h2, and 4 more.

How do I fix CVE-2024-29988?

Upgrade affected software to a fixed version, for example Microsoft Windows 10 1809 10.0.17763.5696, Microsoft Windows 10 21h2 10.0.19044.4291, Microsoft Windows 10 22h2 10.0.19045.4291 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-29988 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.