Windows
CVE-2025-21263
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, read limits
MITRE ATT&CK
1 technique across 1 tactic: Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 6.6 (MEDIUM). Attack characteristics: physical attack vector, low complexity, low privileges required, no user interaction not required. EPSS exploitation probability: 0.21%. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to read data from memory outside the intended buffer boundaries. |
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Alert meAnalysisAIv1 – Mar 28, 2026
Windows Digital Media Elevation of Privilege Vulnerability. Rated medium severity (CVSS 6.6), this vulnerability is low attack complexity. This Out-of-bounds Read vulnerability could allow attackers to read data from memory outside the intended buffer boundaries.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Validate array indices and buffer lengths. Use memory-safe languages. Enable AddressSanitizer during testing.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Out-of-bounds Read (CWE-125), which allows attackers to read data from memory outside the intended buffer boundaries. Affected products include: Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21H2, Microsoft Windows 10 22H2.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
Windows Digital Media Elevation of Privilege Vulnerability
Executive ViewAI
CVE-2025-21263 presents notable security risk, a out-of-bounds read vulnerability rated CVSS 6.6. Exploitation could cause memory corruption or application crashes. A patch is available and should be applied during regular vulnerability management.
Apply vendor patch. If patching is delayed: enable ASLR/DEP, apply network segmentation.
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
Affected Products (CPE)CVE.org
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Command injection in the Windows Shell lets remote, unauthenticated attackers bypass a Windows security feature and then
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network
GitHub PoC
Exploit-DB