How severe is CVE-2025-59287?

CVE-2025-59287 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-59287 being actively exploited?

Yes. CVE-2025-59287 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-10-24, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2025-59287?

CVE-2025-59287 primarily affects Microsoft Windows Server 2012. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-59287?

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-2025-59287 have an EU (EUVD) identifier?

Yes. CVE-2025-59287 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34268. It is also flagged as exploited in the EUVD (since 2025-10-24).

When was CVE-2025-59287 published?

CVE-2025-59287 was published on 2025-10-14 and last updated on 2026-06-17.

CVE-2025-59287

CVE-2025-59287 is a critical-severity vulnerability in Microsoft Windows Server 2012 with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-10-24). The underlying weakness is classified as CWE-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 100% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2025-10-24)
EU (EUVD) id: EUVD-2025-34268
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-10-24)
Weakness: CWE-502
Affected product: Microsoft Windows Server 2012
Published: 2025-10-14
Last modified: 2026-06-17

Description

Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.

Frequently asked questions

What is CVE-2025-59287?: Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
How severe is CVE-2025-59287?: CVE-2025-59287 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-59287 being actively exploited?: Yes. CVE-2025-59287 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-10-24, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2025-59287?: CVE-2025-59287 primarily affects Microsoft Windows Server 2012. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-59287?: 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-2025-59287 have an EU (EUVD) identifier?: Yes. CVE-2025-59287 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34268. It is also flagged as exploited in the EUVD (since 2025-10-24).
When was CVE-2025-59287 published?: CVE-2025-59287 was published on 2025-10-14 and last updated on 2026-06-17.

References

Affected products (7)

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:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*

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