CVE-2026-70571

Fix

Microsoft's update · Critical

• KB5128896 — Microsoft Exchange Server 2019 Cumulative Update 15 · build 15.02.1748.055
• KB5128895 — Microsoft Exchange Server Subscription Edition RTM · build 15.02.2562.056
• KB5128898 — Microsoft Exchange Server 2016 Cumulative Update 23 · build 15.01.2507.077
• KB5128897 — Microsoft Exchange Server 2019 Cumulative Update 14 · build 15.02.1544.050

From the 2026-Oct release note of Microsoft's Security Update Guide, revised 2026-10-28 · Exploitation More Likely.

Vendor advisories in the News 1

• Microsoft October 2026 Security Updates: 1476 CVEs, 1 exploited, 96 critical Microsoft Security Update Guide · 2026-10-13

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.