CVE-2026-41614: Improper access control in M365 Copilot for Desktop allows an unauthorized attacker to perform spoofing locall

Q: How do I fix CVE-2026-41614?

365 copilot: upgrade to 19.2604.43111.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-41614 being exploited?

CVE-2026-41614 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-41614 affect?

CVE-2026-41614 affects 365 copilot. Severity is medium (CVSS 6.2). Improper access control in M365 Copilot for Desktop allows an unauthorized attacker to perform spoofing locally.

Q: How urgent is CVE-2026-41614?

Priority 34/100. On your watchlist

Routine

MEDIUM 6.2WATCHLISTUPGRADE

CVE-2026-41614 is a medium-severity flaw (CVSS 6.2) affecting 365 copilot. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper access control in M365 Copilot for Desktop allows an unauthorized attacker to perform spoofing locally.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.2 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-284
Published	2026-05-12
Last modified	2026-10-26

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-12 18:17 UTCPublished CVE record published
2026-10-26 18:10 UTCUpdated Record last modified

microsoft 365 copilot UPGRADE

Affected: < 19.2604.43111.0

Fixed in: 19.2604.43111.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy 365-copilot || rpm -q 365-copilot || 365-copilot --version

2. UPGRADE to 19.2604.43111.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade 365-copilot

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade 365-copilot

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-41614?

365 copilot: upgrade to 19.2604.43111.0. Exact commands for each OS are on this page.

Is CVE-2026-41614 being exploited?

CVE-2026-41614 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-41614 affect?

CVE-2026-41614 affects 365 copilot. Severity is medium (CVSS 6.2). Improper access control in M365 Copilot for Desktop allows an unauthorized attacker to perform spoofing locally.

How urgent is CVE-2026-41614?

Priority 34/100. On your watchlist

Related CVEs

CVE-2026-33102 CRITICAL 9.3 MITIGATE Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate
CVE-2026-40363 HIGH 8.4 MITIGATE UPGRADE Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
CVE-2026-41100 MEDIUM 4.4 UPGRADE Improper access control in M365 Copilot allows an authorized attacker to perform spoofing locally.
CVE-2026-54130 CRITICAL 9.8 MITIGATE Missing authentication for critical function in M365 Copilot allows an unauthorized attacker to disclose infor
CVE-2026-42831 HIGH 7.8 UPGRADE DOWNGRADE Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

References

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