CVE-2026-58617

criticalpriority · track · 39EPSS 0.008 · 56 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.79% (56th) EPSS

CVSS 9.8 · critical

Is it mine?

12 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Improper access control in Microsoft 365 Copilot for iOS allows an unauthorized attacker to elevate privileges over a network.

remediations

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

A vendor fix is available.

FixedMicrosoft 365 Copilot for iOSmsrc_csaf
2.111.4:Security Update:https://apps.apple.com/us/app/microsoft-365-copilot/id541164041
https://apps.apple.com/us/app/microsoft-365-copilot/id541164041

cvss

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

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.1–9.8

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.18.1highAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:Csecondary · ENISA EU

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · secure@microsoft.com USexploitability 2.8 · impact 5.2

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/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-284USCWE-284USCWE-284US

affected products (12)

Products and version ranges known to be affected.

Microsoft 365 Copilot 365 Copilot's Business Chatall versionscert_bundDEcpe:/a:microsoft:365_copilot:-
Microsoft 365 Copilot Outlookall versionscert_bundDEcpe:/a:microsoft:365_copilot:outlook
Microsoft 365 Copilot for Androidall versionscert_bundDEcpe:/a:microsoft:365_copilot:for_android
Microsoft 365 Copilot for iOSall versionscert_bundDEcpe:/a:microsoft:365_copilot:for_ios
Microsoft GitHub Copilot Plugin for JetBrains IDEsall versionscert_bundDEcpe:/a:microsoft:github_copilot:plugin_for_jetbrains_ides
Microsoft Windows Terminal for Windows 10all versionscert_bundDEcpe:/a:microsoft:windows_terminal:for_windows_10
Microsoft Windows Terminal for Windows 11all versionscert_bundDEcpe:/a:microsoft:windows_terminal:for_windows_11
Microsoft Microsoft 365 Copilot for iOS1.0 → 2.111.4enisa_euvdEU
Microsoft Corp Microsoft 365 Copilotall versionsfstec_bduRU
Microsoft Microsoft 365 Copilot for iOSall versionsfixedmsrc_csafUS
Microsoft Microsoft 365 Copilot for iOS< 2.111.4msrc_csafUS
microsoft 365 copilot< 2.111.4nvdUScpe:2.3:a:microsoft:365_copilot:*:*:*:*:*:*:*:*

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2320Microsoft Windows Terminal, 365 Copilot, Github Copilot: Mehrere SchwachstellenDeutsch2026-07-14csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Microsoft Windows Terminal, 365 Copilot und Github Copilotausnutzen, um beliebigen Programmcode auszuführen, um falsche Informationen darzustellen und um seine Privilegien zu erhöhen.
msrc_CVE-2026-58617M365 Copilot for iOS Elevation of Privilege Vulnerability2026-07-14csaf · 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 nvd NVD CVE.org MITRE

published 2026-07-14modified 2026-10-24

references (3)

External citations — patches, advisories, analysis.

scry

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