CVE-2026-87695

highpriority · track · 31EPSS 0.003 · 22 %ileDEFRNLUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.30% (22nd) EPSS

CVSS 7.8 · high

Is it mine?

22 products

Check your exposure

Who says so?

4 sources

cert_bund · msrc_csaf · ncsc_nl · certfr

EPSS · scored 2026-10-26

Inclusion of functionality from untrusted control sphere in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedMicrosoft Exchange Server 2016 Cumulative Update 23msrc_csaf
15.01.2507.077:Security Update:https://support.microsoft.com/help/5128898
https://support.microsoft.com/help/5128898
FixedMicrosoft Exchange Server 2019 Cumulative Update 14msrc_csaf
15.02.1544.050:Security Update:https://support.microsoft.com/help/5128897
https://support.microsoft.com/help/5128897
FixedMicrosoft Exchange Server 2019 Cumulative Update 15msrc_csaf
15.02.1748.055:Security Update:https://support.microsoft.com/help/5128896
https://support.microsoft.com/help/5128896
FixedMicrosoft Exchange Server Subscription Edition RTMmsrc_csaf
15.02.2562.056:Security Update:https://support.microsoft.com/help/5128895
https://support.microsoft.com/help/5128895

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · secure@microsoft.com USexploitability 1.8 · impact 5.9

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-829USCWE-829USCWE-829US

affected products (22)

Products and version ranges known to be affected.

Microsoft Windows 10all versionscert_bundDEcpe:/o:microsoft:windows_10:-
Microsoft Windows 11all versionscert_bundDEcpe:/o:microsoft:windows_11:-
Microsoft Windows Security Appall versionscert_bundDEcpe:/o:microsoft:windows:security_app
Microsoft Windows Server 2012all versionscert_bundDEcpe:/o:microsoft:windows_server_2012:-
Microsoft Windows Server 2012 R2all versionscert_bundDEcpe:/o:microsoft:windows_server_2012_r2:-
Microsoft Windows Server 2016all versionscert_bundDEcpe:/o:microsoft:windows_server_2016:-
Microsoft Windows Server 2019all versionscert_bundDEcpe:/o:microsoft:windows_server_2019:-
Microsoft Windows Server 2022all versionscert_bundDEcpe:/o:microsoft:windows_server_2022:-
Microsoft Windows Server 2025all versionscert_bundDEcpe:/o:microsoft:windows_server_2025:-
Microsoft Microsoft Exchange Server 2016 Cumulative Update 23all versionsfixedmsrc_csafUS
Microsoft Microsoft Exchange Server 2016 Cumulative Update 23< 15.01.2507.077msrc_csafUS
Microsoft Microsoft Exchange Server 2019 Cumulative Update 14all versionsfixedmsrc_csafUS
Microsoft Microsoft Exchange Server 2019 Cumulative Update 14< 15.02.1544.050msrc_csafUS
Microsoft Microsoft Exchange Server 2019 Cumulative Update 15all versionsfixedmsrc_csafUS
Microsoft Microsoft Exchange Server 2019 Cumulative Update 15< 15.02.1748.055msrc_csafUS
Microsoft Microsoft Exchange Server Subscription Edition RTMall versionsfixedmsrc_csafUS
Microsoft Microsoft Exchange Server Subscription Edition RTM< 15.02.2562.056msrc_csafUS
Microsoft Exchange≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Exchange Server 2016 Cumulative Update 23≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Exchange Server 2019 Cumulative Update 14≤ vers:unknown/*ncsc_nlNL

showing 20 of 22

advisories (4)

Vendor and ecosystem advisories describing this.

NCSC-2026-0419Kwetsbaarheden verholpen in Microsoft Excange ServerNL2026-10-13csaf · ncsc_nlNL
Microsoft heeft kwetsbaarheden verholpen in Exchange.
WID-SEC-W-2026-3892Microsoft Windows und Windows Server: Mehrere SchwachstellenDeutsch2026-10-13csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in verschiedenen Versionen von Microsoft Windows Server und Microsoft Windows ausnutzen, um seine Privilegien auf administrative Rechte zu erhöhen, um beliebigen Code auszuführen, um Informationen offenzulegen, um einen Denial of Service herbeizuführen, um den Benutzer zu täuschen und andere, nicht näher spezifizierte Auswirkungen zu verursachen.
msrc_CVE-2026-87695Microsoft Exchange Server Elevation of Privilege Vulnerability2026-10-13csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
CERTFR-2026-AVI-1316Multiples vulnérabilités dans les produits MicrosoftFrançais2026-10-14vendor · certfrFR

sources

Which sources assert this record, and when.

cert_bund msrc_csaf ncsc_nl certfr NVD CVE.org MITRE

published 2026-10-13modified 2026-10-14

references (1) nvd

External citations — patches, advisories, analysis.

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87695

scry

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