CVE-2026-55946

mediumpriority · track · 24EPSS 0.004 · 33 %ileDEUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.39% (33rd) EPSS

CVSS 5.9 · medium

Is it mine?

3 products

Who says so?

3 sources

cert_bund · msrc_csaf · nvd

EPSS · scored 2026-10-27

Ai command injection in Microsoft Copilot allows an unauthorized attacker to disclose information over a network.

cvss

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

6.1

010

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

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.2 · impact 3.6

v3.16.1mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:Nprimary · secure@microsoft.com USexploitability 1.6 · impact 4

v3.15.4mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.16.1mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

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

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

The CWE weakness classes this flaw belongs to.

Products and version ranges known to be affected.

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3458Microsoft 365 Copilot: Schwachstelle ermöglicht Offenlegung von InformationenDeutsch2026-09-17csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Microsoft 365 Copilot ausnutzen, um Informationen offenzulegen.
msrc_CVE-2026-55946Microsoft Copilot Information Disclosure Vulnerability2026-09-17csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Which sources assert this record, and when.

published 2026-09-17modified 2026-10-14

External citations — patches, advisories, analysis.

scry

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