CVE-2024-21351 | Windows SmartScreen Security Feature Bypass Vulnerability

Exp

Windows SmartScreen Security Feature Bypass Vulnerability

Published: 2024-02-13 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-21351 is rated Critical Active Threat (94.7/100): CVSS High severity, with high exploitation likelihood (EPSS 30.34%, 98th percentile). CISA KEV confirms active exploitation (added 2024-02-13) affecting Microsoft / Windows. a weakness (CWE-94) Unauthenticated remote administrative access may be possible. EPSS rose +19.68% over the last day, indicating growing attacker interest. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2024-21351

Name: Microsoft Windows SmartScreen Security Feature Bypass Vulnerability · CISA KEV detail

Exploit added: 2024-02-13

Action due: 2024-03-05

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Exploit prediction scoring system (EPSS) score for CVE-2024-21351

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 2026-06-15 10.67% 30.34% +19.68%
2 2026-05-09 13.16% 10.67% -2.49%
3 2026-03-16 — 13.16% —

Full EPSS history (40 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-21351

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.6 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.8 4.7 [email protected]

Weakness enumeration for CVE-2024-21351

Affected software / configurations for CVE-2024-21351

Vendor Product Version Raw CPE
microsoft windows_10_1507 < 10.0.10240.20469 cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:*:*
microsoft windows_10_1607 < 10.0.14393.6709 cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:*:*
microsoft windows_10_1809 < 10.0.17763.5458 cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*
microsoft windows_10_21h2 < 10.0.19044.4046 cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*
microsoft windows_10_22h2 < 10.0.19045.4046 cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*
microsoft windows_11_21h2 < 10.0.22000.2777 cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:*
microsoft windows_11_22h2 < 10.0.22621.3155 cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*
microsoft windows_11_23h2 < 10.0.22631.3155 cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*
microsoft windows_server_2016 — cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
microsoft windows_server_2019 < 10.0.17763.5458 cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
microsoft windows_server_2022 < 10.0.20348.2322 cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
microsoft windows_server_2022_23h2 < 10.0.25398.709 cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*

References for CVE-2024-21351

cvelogic Threat Intelligence