SmartScreen Prompt Security Feature Bypass Vulnerability
Conclusion & alert: CVE-2024-29988 is rated Critical Active Threat (96.9/100): CVSS High severity, with high exploitation likelihood (EPSS 62.77%, 98th percentile). Core evidence: CISA KEV confirms active exploitation (added 2024-04-30) affecting Microsoft / SmartScreen Prompt. a weakness (CWE-693) Unauthenticated remote administrative access may be possible. EPSS rose +2.26% over the last day, indicating growing attacker interest. Mandatory action: The CISA remediation deadline has passed—treat as an emergency patch priority.
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: Microsoft SmartScreen Prompt Security Feature Bypass Vulnerability · CISA KEV detail
: 2024-04-30
: 2024-05-21
: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-09 | 60.50% | 62.77% | +2.26% |
| 2 | 2026-05-06 | 62.77% | 60.50% | -2.26% |
| 3 | 2026-03-18 | — | 62.77% | — |
Full EPSS history (29 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 8.8 | 3.1 | HIGH |
|
2.8 | 5.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | windows_10_1809 | < 10.0.17763.5696 | cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:arm64:* |
| microsoft | windows_10_1809 | < 10.0.17763.5696 | cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* |
| microsoft | windows_10_1809 | < 10.0.17763.5696 | cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* |
| microsoft | windows_10_21h2 | < 10.0.19044.4291 | cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:* |
| microsoft | windows_10_22h2 | < 10.0.19045.4291 | cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:* |
| microsoft | windows_11_21h2 | < 10.0.22000.2899 | cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:* |
| microsoft | windows_11_22h2 | < 10.0.22621.3447 | cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:* |
| microsoft | windows_11_23h2 | < 10.0.22631.3447 | cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:* |
| microsoft | windows_server_2019 | < 10.0.17763.5696 | cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* |
| microsoft | windows_server_2022 | < 10.0.20348.2402 | cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* |
| microsoft | windows_server_2022_23h2 | < 10.0.25398.830 | cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-29988 | Patch Vendor Advisory |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-29988 | US Government Resource |