Threat Intelligence / CVE / CVE-2026-27913

CVE-2026-27913 — Microsoft Windows Server 2012

CVSS v3.1 7.7 (HIGH) · EPSS 0.1% (higher than 28.4% of all scored CVEs) · Priority 5/10 · Published 2026-04-14

As of 2026-04-23, CVE-2026-27913 is a HIGH-severity vulnerability in Microsoft Windows Server 2012, CVSS v3.1 7.7, EPSS 0.1% (28.4th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-27913, most recently “Microsoft April 2026 Patch Tuesday — 163 CVEs / 88 Advisories (CVE-2026-32201 SharePoint Zero-Day Exploited In-The-Wild, CVE-2026-33825 Defender EoP Public PoC, CVE-2026-33824 IKE RCE CVSS 9.8, CVE-2026-33827 TCP/IP Wormable RCE)”.

Last updated: 2026-04-23

What is CVE-2026-27913?

Improper input validation in Windows BitLocker allows an unauthorized attacker to bypass a security feature locally.

The record classifies CVE-2026-27913 under weakness class CWE-20. Its CVSS v3 base vector states that the flaw requires local access to the host, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity. 6 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 151 days ago.

Severity and exploitation probability

CVSS v3.1 base score
7.7 — HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS (FIRST)
0.1% probability of exploitation in the next 30 days, higher than 28.4% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-04-14, last modified 2026-04-23

Is CVE-2026-27913 being exploited?

It currently carries a trending score of 12 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2026-27913

The record marks a vendor fix as available for CVE-2026-27913. Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27913. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2026-27913

1 tracked threat in the Threadlinqs corpus references CVE-2026-27913, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Seeded from nvd and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2026-27913 are available via the Threadlinqs MCP server (Purple tier). View plans →

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