What is the CVSS score of EUVD-2025-20553?

EUVD-2025-20553 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of 365 Apps are affected by EUVD-2025-20553?

CVE-2025-49705 is a high-severity heap buffer overflow vulnerability in Microsoft Office PowerPoint that allows local code execution without requiring user authentication beyond opening a malicious…. A patch is available.

How to fix or mitigate EUVD-2025-20553?

Within 24 hours: Inventory all PowerPoint installations across the organization and identify patch availability from Microsoft for your specific Office version. Within 7 days: Deploy the available vendor patch to all affected PowerPoint installations through your standard change management process. Within 30 days: Conduct a post-deployment verification sweep and review file-handling policies to restrict PowerPoint file sources from untrusted external parties.

365 Apps EUVD-2025-20553

| CVE-2025-49705 HIGH

Heap-based Buffer Overflow (CWE-122)

2025-07-08 secure@microsoft.com

Microsoft Heap Overflow Buffer Overflow 365 Apps Office Office Long Term Servicing Channel Powerpoint

7.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 06:29 EUVD-patch-fix

executive_summary

Re-analysis Queued

Apr 16, 2026 - 05:29 backfill_euvd_patch

patch_released

Patch available

Apr 16, 2026 - 05:29 EUVD

16.99.25071321,16.0.5508.1000

EUVD ID Assigned

Mar 16, 2026 - 04:21 euvd

EUVD-2025-20553

Analysis Generated

Mar 16, 2026 - 04:21 vuln.today

CVE Published

Jul 08, 2025 - 17:15 nvd

HIGH 7.8

DescriptionCVE.org

Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.

Analysis

Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.

Technical ContextAI

A buffer overflow occurs when data written to a buffer exceeds its allocated size, potentially overwriting adjacent memory and corrupting program state. This vulnerability is classified as Heap-based Buffer Overflow (CWE-122).