How severe is CVE-2025-21314?

CVE-2025-21314 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2025-21314 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-21314?

CVE-2025-21314 primarily affects Microsoft Windows 10 1607. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-21314?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-21314 have an EU (EUVD) identifier?

Yes. CVE-2025-21314 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2379.

When was CVE-2025-21314 published?

CVE-2025-21314 was published on 2025-01-14 and last updated on 2026-06-17.

CVE-2025-21314

CVE-2025-21314 is a medium-severity vulnerability in Microsoft Windows 10 1607 with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-451.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-2379
Weakness: CWE-451
Affected product: Microsoft Windows 10 1607
Published: 2025-01-14
Last modified: 2026-06-17

Description

Windows SmartScreen Spoofing Vulnerability

Frequently asked questions

What is CVE-2025-21314?: Windows SmartScreen Spoofing Vulnerability
How severe is CVE-2025-21314?: CVE-2025-21314 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2025-21314 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-21314?: CVE-2025-21314 primarily affects Microsoft Windows 10 1607. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-21314?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-21314 have an EU (EUVD) identifier?: Yes. CVE-2025-21314 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2379.
When was CVE-2025-21314 published?: CVE-2025-21314 was published on 2025-01-14 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21314

Affected products (14)

cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*

More vulnerabilities in Microsoft Windows 10 1607

CVE-2026-47291 — Critical (CVSS 9.8): Integer overflow or wraparound in Windows HTTP.sys allows an unauthorized attacker to execute code over a network.
CVE-2026-44815 — Critical (CVSS 9.8): Stack-based buffer overflow in Windows DHCP Client allows an unauthorized attacker to execute code over a network.
CVE-2026-33824 — Critical (CVSS 9.8): Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.
CVE-2025-60724 — Critical (CVSS 9.8): Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code over a…
CVE-2025-53766 — Critical (CVSS 9.8): Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a network.
CVE-2025-47981 — Critical (CVSS 9.8): Heap-based buffer overflow in Windows SPNEGO Extended Negotiation allows an unauthorized attacker to execute code over…

All CVEs affecting Microsoft Windows 10 1607 →

Other CWE-451 vulnerabilities

CVE-2026-2634 — Critical (CVSS 9.8): Malicious scripts could cause desynchronization between the address bar and web content before a response is received…
CVE-2026-0907 — Critical (CVSS 9.8): Incorrect security UI in Split View in Google Chrome prior to 144.0.7559.59 allowed a remote attacker to perform UI…
CVE-2026-0906 — Critical (CVSS 9.8): Incorrect security UI in Google Chrome on Android prior to 144.0.7559.59 allowed a remote attacker to spoof the…
CVE-2025-8043 — Critical (CVSS 9.8): Focus incorrectly truncated URLs towards the beginning instead of around the origin. This vulnerability was fixed in…
CVE-2026-11175 — High (CVSS 8.8): Incorrect security UI in Messages in Google Chrome on Android prior to 149.0.7827.53 allowed a remote attacker to…
CVE-2026-11172 — High (CVSS 8.8): Incorrect security UI in Contact Picker in Google Chrome on Android prior to 149.0.7827.53 allowed a remote attacker to…

Browse all CWE-451 vulnerabilities →