How severe is CVE-2025-24991?

CVE-2025-24991 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-24991 being actively exploited?

Yes. CVE-2025-24991 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-03-11, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2025-24991?

CVE-2025-24991 primarily affects Microsoft Windows 10 1507. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-24991?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2025-24991 have an EU (EUVD) identifier?

Yes. CVE-2025-24991 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-6320. It is also flagged as exploited in the EUVD (since 2025-03-11).

When was CVE-2025-24991 published?

CVE-2025-24991 was published on 2025-03-11 and last updated on 2026-06-17.

CVE-2025-24991

CVE-2025-24991 is a medium-severity vulnerability in Microsoft Windows 10 1507 with a CVSS 3.x base score of 5.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-03-11). The underlying weakness is classified as CWE-125.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2025-03-11)
EU (EUVD) id: EUVD-2025-6320
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-03-11)
Weakness: CWE-125
Affected product: Microsoft Windows 10 1507
Published: 2025-03-11
Last modified: 2026-06-17

Description

Out-of-bounds read in Windows NTFS allows an authorized attacker to disclose information locally.

Frequently asked questions

What is CVE-2025-24991?: Out-of-bounds read in Windows NTFS allows an authorized attacker to disclose information locally.
How severe is CVE-2025-24991?: CVE-2025-24991 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-24991 being actively exploited?: Yes. CVE-2025-24991 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-03-11, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2025-24991?: CVE-2025-24991 primarily affects Microsoft Windows 10 1507. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-24991?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2025-24991 have an EU (EUVD) identifier?: Yes. CVE-2025-24991 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-6320. It is also flagged as exploited in the EUVD (since 2025-03-11).
When was CVE-2025-24991 published?: CVE-2025-24991 was published on 2025-03-11 and last updated on 2026-06-17.

References

Affected products (28)

cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:*
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:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
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:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*

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Other CWE-125 (Out-of-bounds Read) vulnerabilities

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