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🛡️ CVE-2025-21361 — office

🟠 CVSS 7.8 — High ✅ No Known Exploit CWE-641 NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Microsoft Outlook Remote Code Execution Vulnerability

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, 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 high, availability high.

CVSS metrics in full

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

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • 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: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2025-21361 is classified as CWE-641: Improper Restriction of Names for Files and Other Resources. The product constructs the name of a file or other resource using input from an upstream component, but it does not restrict or incorrectly restricts the resulting name.

Affected software

CVE-2025-21361 is recorded against 3 packages.

  • office
  • office-long-term-servicing-channel
  • outlook (fixed in 16.93)

Timeline and source

Published on 14 January 2025 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

msrc.microsoft.com

Other advisories for this package

office has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-641: Improper Restriction of Names for Files and Other Resources) in other software:

Details

Severity HIGH
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE CWE-641
Public Exploit ✅ No
Source NVD
Published 2025-01-14
Updated 2026-08-20
Modified 2026-06-17

Affected Packages

Software From version Fixed in
office — —
office-long-term-servicing-channel — —
outlook — 16.93

Similar Threats

Site Security Check

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CVE-2025-21361 is rated CVSS 7.8 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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