What is the CVSS score of CVE-2025-64656?

CVE-2025-64656 has a CVSS 3.1 base score of 9.4 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L. EPSS exploitation probability: 0.2%.

Which versions of Azure Application Gateway are affected by CVE-2025-64656?

Organizations using Out-of-bounds read in Application Gateway face critical risk from CVE-2025-64656, a out-of-bounds read vulnerability rated CVSS 9.4.

How to fix or mitigate CVE-2025-64656?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. Monitor vendor channels for patch availability.

Azure Application Gateway CVE-2025-64656

CRITICAL

Out-of-bounds Read (CWE-125)

2025-11-26 secure@microsoft.com

Buffer Overflow Information Disclosure Azure Application Gateway

9.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.4 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:24 vuln.today

CVE Published

Nov 26, 2025 - 01:16 nvd

CRITICAL 9.4

DescriptionCVE.org

Out-of-bounds read in Application Gateway allows an unauthorized attacker to elevate privileges over a network.

AnalysisAI

Out-of-bounds read in Application Gateway allows an unauthorized attacker to elevate privileges over a network. Rated critical severity (CVSS 9.4), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Read (CWE-125), which allows attackers to read data from memory outside the intended buffer boundaries. Out-of-bounds read in Application Gateway allows an unauthorized attacker to elevate privileges over a network. Affected products include: Microsoft Azure Application Gateway.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate array indices and buffer lengths. Use memory-safe languages. Enable AddressSanitizer during testing.