How severe is CVE-2026-27913?

CVE-2026-27913 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-27913 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27913?

CVE-2026-27913 primarily affects Microsoft Windows Server 2012. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-27913?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-27913 have an EU (EUVD) identifier?

Yes. CVE-2026-27913 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22455.

When was CVE-2026-27913 published?

CVE-2026-27913 was published on 2026-04-14 and last updated on 2026-06-17.

CVE-2026-27913

CVE-2026-27913 is a high-severity vulnerability in Microsoft Windows Server 2012 with a CVSS 3.x base score of 7.7. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.7)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-22455
Weakness: CWE-20
Affected product: Microsoft Windows Server 2012
Published: 2026-04-14
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2026-27913?: Improper input validation in Windows BitLocker allows an unauthorized attacker to bypass a security feature locally.
How severe is CVE-2026-27913?: CVE-2026-27913 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-27913 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27913?: CVE-2026-27913 primarily affects Microsoft Windows Server 2012. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-27913?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-27913 have an EU (EUVD) identifier?: Yes. CVE-2026-27913 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22455.
When was CVE-2026-27913 published?: CVE-2026-27913 was published on 2026-04-14 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27913

Affected products (6)

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:*:*:*:*:*:*:*:*

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