CVE-2026-26114

highpriority · track · 11EPSS 0.031 · 88 %ileexploit · PoCDEEUNLRUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · PoC

Likely / severe?

3.15% (88th) EPSS

CVSS 8.8 · high

Is it mine?

42 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Deserialization of untrusted data in Microsoft Office SharePoint 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 SharePoint Enterprise Server 2016msrc_csaf
16.0.5543.1000:Security Update:https://support.microsoft.com/help/5002850
https://support.microsoft.com/help/5002850
FixedMicrosoft SharePoint Server 2019msrc_csaf
16.0.10417.20102:Security Update:https://support.microsoft.com/help/5002845
https://support.microsoft.com/help/5002845

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

v3.18.8highAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

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 · ENISA EU

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

v3.18.3highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · 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 · NCSC-NL NL

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-502USCWE-502USCWE-502USCWE-502US

exploits (2)

Public proof-of-concept and weaponised exploit code.

fazilbaig1/CVE-2026-26114-Patchpatching N-day of CVE-2026-26114 before microsoft. where microsoft could not patch 100% in many months. but FAC security did itPoC · poc_in_github
huynambka/cve-2026-26114-pochuynambka/cve-2026-26114-pocPoC · poc_in_github

affected products (42)

Products and version ranges known to be affected.

Microsoft 365 Appsall versionscert_bundDEcpe:/a:microsoft:365_apps:-
Microsoft Excel 2016all versionscert_bundDEcpe:/a:microsoft:excel:2016
Microsoft Office 2016all versionscert_bundDEcpe:/a:microsoft:office:2016
Microsoft Office 2019all versionscert_bundDEcpe:/a:microsoft:office:2019
Microsoft Office LTSC 2021all versionscert_bundDEcpe:/a:microsoft:office:ltsc_2021
Microsoft Office LTSC 2024all versionscert_bundDEcpe:/a:microsoft:office:ltsc_2024
Microsoft Office LTSC for Mac 2021all versionscert_bundDEcpe:/a:microsoft:office:ltsc_for_mac_2021
Microsoft Office LTSC for Mac 2024all versionscert_bundDEcpe:/a:microsoft:office:ltsc_for_mac_2024
Microsoft Office Online Serverall versionscert_bundDEcpe:/a:microsoft:office_online_server:-
Microsoft Office for Androidall versionscert_bundDEcpe:/a:microsoft:office:for_android
Microsoft SharePoint Enterprise Server 2016all versionscert_bundDEcpe:/a:microsoft:sharepoint:enterprise_server_2016
Microsoft SharePoint Server 2019all versionscert_bundDEcpe:/a:microsoft:sharepoint_server_2019:-
Microsoft SharePoint Server Subscription Editionall versionscert_bundDEcpe:/a:microsoft:sharepoint:server_subscription_edition
Microsoft Microsoft SharePoint Enterprise Server 201616.0.0 → 16.0.5543.1000enisa_euvdEU
Microsoft Microsoft SharePoint Server 201916.0.0 → 16.0.10417.20102enisa_euvdEU
Microsoft Corp Microsoft SharePoint Enterprise Server 2016≤ 16.0.5543.1000fstec_bduRU
Microsoft Corp Microsoft SharePoint Server 2019≤ 16.0.10417.20102fstec_bduRU
Microsoft Microsoft SharePoint Enterprise Server 2016all versionsfixedmsrc_csafUS
Microsoft Microsoft SharePoint Enterprise Server 2016< 16.0.5543.1000msrc_csafUS
Microsoft Microsoft SharePoint Server 2019all versionsfixedmsrc_csafUS

showing 20 of 42

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2026-0084Kwetsbaarheden verholpen in Microsoft OfficeNL2026-03-10csaf · ncsc_nlNL
Microsoft heeft kwetsbaarheden verholpen in diverse Office producten.
WID-SEC-W-2026-0659Microsoft Office und SharePoint Produkte: Mehrere SchwachstellenDeutsch2026-03-10csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in verschiedenen Microsoft Office und SharePoint Produkten ausnutzen, um beliebigen Programmcode auszuführen, um falsche Informationen darzustellen, um Informationen offenzulegen, und um seine Privilegien zu erhöhen.
msrc_CVE-2026-26114Microsoft SharePoint Server Remote Code Execution Vulnerability2026-03-10csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund msrc_csaf ncsc_nl NVD CVE.org MITRE

published 2026-03-10modified 2026-07-06

references (3)

External citations — patches, advisories, analysis.

scry

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