AI and data stack advisories

Severe, 6 weeks977Projects326

977 severe, 6 weeks · 326 projects

MicrosoftCVE-2026-87692

Microsoft Exchange Server: unsafe deserialization

Microsoft

CVE-2026-87692 · Published Oct 13, 2026 · updated Oct 29, 2026

High7.8
Fix: upgrade to 15.01.2507.077 or later (3 fixed versions below)
Microsoft advisory

Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.

Affected versions

PackageAffectedFixed in
Microsoft Exchange Server 2016 Cumulative Update 23
Product
>= 15.01.0.0, < 15.01.2507.07715.01.2507.077
Microsoft Exchange Server 2019 Cumulative Update 14
Product
>= 15.02.0.0, < 15.02.1544.05015.02.1544.050
Microsoft Exchange Server Subscription Edition RTM
Product
>= 15.02.0.0, < 15.02.2562.05615.02.2562.056
Details and references
CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Severity from
the vendor (its own CVE record or advisory)
Weakness
CWE-502

More Microsoft advisories

All Microsoft
High 8.0Oct 13Microsoft SQL Server: stack buffer overflowCVE-2026-96956fixed in 14.0.2140.2 +7High 8.8Oct 13Microsoft SQL Server: heap buffer overflowCVE-2026-94512fixed in 14.0.2140.2 +7Medium 6.4Oct 13Microsoft SQL Server: heap buffer overflowCVE-2026-88085fixed in 14.0.2140.2 +7Medium 5.3Oct 13Microsoft SQL Server: out-of-bounds readCVE-2026-88086fixed in 15.0.2200.2 +5High 7.0Oct 13Microsoft SQL Server: integer overflowCVE-2026-88088fixed in 15.0.2200.2 +5Medium 6.7Oct 13Microsoft SQL Server: heap buffer overflowCVE-2026-88089fixed in 14.0.2140.2 +7