CVE-2026-69355

highpriority · track · 35EPSS 0.009 · 60 %ileDENLUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.91% (60th) EPSS

CVSS 8.8 · high

Is it mine?

23 products

Check your exposure

Who says so?

3 sources

cert_bund · msrc_csaf · ncsc_nl

EPSS · scored 2026-10-27

External control of file name or path in Microsoft Exchange Server allows an authorized attacker to execute code over a network.

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
15.01.2507.073:Security Update:https://support.microsoft.com/help/5121611
https://support.microsoft.com/help/5121611
FixedMicrosoft Exchange Server 2019 Cumulative Update 14msrc_csaf
15.02.1544.046:Security Update:https://support.microsoft.com/help/5121610
https://support.microsoft.com/help/5121610
FixedMicrosoft Exchange Server 2019 Cumulative Update 15msrc_csaf
15.02.1748.051:Security Update:https://support.microsoft.com/help/5121609
https://support.microsoft.com/help/5121609
FixedMicrosoft Exchange Server Subscription Edition RTMmsrc_csaf
15.02.2562.049:Security Update:https://support.microsoft.com/help/5121608
https://support.microsoft.com/help/5121608

cvss

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

8.8

010

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

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · secure@microsoft.com USexploitability 2.8 · impact 5.9

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.18.8highCVSS:3.1/AV:N/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-73USCWE-73US

affected products (23)

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 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< 15.01.2507.073msrc_csafUS
Microsoft Microsoft Exchange Server 2019 Cumulative Update 14all versionsfixedmsrc_csafUS
Microsoft Microsoft Exchange Server 2019 Cumulative Update 14< 15.02.1544.046msrc_csafUS
Microsoft Microsoft Exchange Server 2019 Cumulative Update 15all versionsfixedmsrc_csafUS
Microsoft Microsoft Exchange Server 2019 Cumulative Update 15< 15.02.1748.051msrc_csafUS
Microsoft Microsoft Exchange Server Subscription Edition RTMall versionsfixedmsrc_csafUS
Microsoft Microsoft Exchange Server Subscription Edition RTM< 15.02.2562.049msrc_csafUS
Microsoft Microsoft Exchange Server 2016 Cumulative Update 23≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Exchange Server 2019 Cumulative Update 14≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Exchange Server 2019 Cumulative Update 15≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Exchange Server Subscription Edition RTM≤ vers:unknown/*ncsc_nlNL

showing 20 of 23

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2026-0349Kwetsbaarheden verholpen in Microsoft Exchange serverNL2026-09-08csaf · ncsc_nlNL
Microsoft heeft 9 kwetsbaarheden verholpen in Exchange Server.
WID-SEC-W-2026-3243Microsoft Windows: Mehrere SchwachstellenDeutsch2026-09-08csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in verschiedenen Versionen von Microsoft Windows Server, Microsoft Windows 10 und Microsoft Windows 11 ausnutzen, um seine Privilegien zu erhöhen, um einen Denial of Service herbeizuführen, um Informationen offenzulegen und um beliebigen Code auszuführen.
msrc_CVE-2026-69355Microsoft Exchange Server Remote Code Execution Vulnerability2026-09-08csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

sources

Which sources assert this record, and when.

cert_bund msrc_csaf ncsc_nl NVD CVE.org MITRE

published 2026-09-08modified 2026-09-30

references (1) nvd

External citations — patches, advisories, analysis.

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69355PatchVendor Advisory

scry

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