What is CVE-2026-45583?

CVE-2026-45583 is a high-severity vulnerability, classified under Code Injection. CVSS score: 7.5/10. Published 2026-06-09.

How severe is CVE-2026-45583?

High severity. CVSS v3 base score is 7.5 out of 10.

CVE-2026-45583

CVE-2026-45583

Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.

Vulnerability class: RCE (Remote Code Execution)

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

Weakness classification (CWE)

CWE-94 — Code Injection

References

secure@microsoft.com

Frequently asked questions

What is CVE-2026-45583?: CVE-2026-45583 is a high-severity vulnerability, classified under Code Injection. CVSS score: 7.5/10. Published 2026-06-09.
How severe is CVE-2026-45583?: High severity. CVSS v3 base score is 7.5 out of 10.