🛡️ CVE-2026-45460 — 365-apps

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is high, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

• Attack vector: Local — a local account, shell or session on the host is needed.
• Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: Required — someone has to click, open or visit something.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: None.
• Availability impact: None.

Weakness class

CVE-2026-45460 is classified as CWE-126: Buffer Over-read. The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.

Affected software

CVE-2026-45460 is recorded against 6 packages.

• 365-apps
• 365-copilot
• microsoft-365
• office-2019
• office-2021
• office-2024

Timeline and source

Published on 9 June 2026 and last revised on 23 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

msrc.microsoft.com

Same weakness in other software

These advisories are the same class of weakness (CWE-126: Buffer Over-read) in other software:

• CVE-2023-22385 (8.2 High, published 3 Oct 2023)
• CVE-2023-24848 (8.2 High, published 3 Oct 2023)
• CVE-2022-33220 (5.1 Medium, published 5 Sep 2023)
• CVE-2023-21667 (6.5 Medium, published 5 Sep 2023)
• CVE-2022-40524 (6.7 Medium, published 5 Sep 2023)
• CVE-2023-21625 (8.2 High, published 8 Aug 2023)
• CVE-2023-23571 (7.5 High, published 6 Jul 2023)
• CVE-2023-21660 (7.5 High, published 6 Jun 2023)

Details

Affected Packages

References