HIGH

CVE-2026-45445

CVSS v3

7.5

HIGH

EPSS Score

0.3 %

exploit probability

CISA KEV

known exploited

Exploitation

—

SSVC status

Description

Microsoft Security Update (CVE-2026-45445)

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: 2026-06-19
MSRC Title: AES-OCB IV Ignored on EVP_Cipher() Path

Frequently asked questions

What is CVE-2026-45445?

Microsoft Security Update (CVE-2026-45445)

Is CVE-2026-45445 actively exploited?

Active exploitation of CVE-2026-45445 has not been confirmed. The EPSS score is 0.3%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-45445?

CVE-2026-45445 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Is CVE-2026-45445 affecting your environment?

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