PT-2025-1238 · Microsoft · Office+1

Arnold Osipov + 6 · Published 2025-01-14 · Updated 2025-10-06 · CVE-2025-21357

Positive Technologies (AI Summary)

CVSS v3.1

6.7

Medium

Base vector

AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Microsoft Outlook versions 2016 Microsoft Office versions 2019 through 2024

Description The issue allows remote attackers to execute arbitrary code and affect the system. It is reported that this issue has been patched by Microsoft with the aid of external researchers.

Recommendations For Microsoft Outlook version 2016, apply the patch provided by Microsoft. For Microsoft Office versions 2019 through 2024, apply the patch provided by Microsoft. As a temporary workaround, consider restricting access to potentially vulnerable components until a patch is applied.

Fix

RCE

Use of Uninitialized Resource

Weakness Enumeration

CWE-908

Related Identifiers

BDU:2025-00630

CVE-2025-21357

Affected Products

Office

Outlook

References · 13

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21357 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-21357 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-00630 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-21357 · Security Note
• https://t.me/aptreports/15726 · Telegram Post
• https://t.me/aptreports/15905 · Telegram Post
• https://twitter.com/CVEnew/status/1879490195021778977 · Twitter Post
• https://twitter.com/morphisec/status/1879581837174968712 · Twitter Post
• https://twitter.com/0patch/status/1889455374920565056 · Twitter Post
• https://twitter.com/morphisec/status/1975197620013269055 · Twitter Post
• https://t.me/cvenotify/127269 · Telegram Post
• https://twitter.com/morphisec/status/1879891264901984685 · Twitter Post
• https://twitter.com/agentwhitehat/status/1879798951806951527 · Twitter Post