Platform
azure
Component
cognitive-service-for-language
Fixed in
2.5.4
CVE-2025-64663 describes a critical elevation of privilege vulnerability within the Azure Cognitive Service for Language. This flaw allows attackers to bypass access controls, potentially leading to unauthorized access and manipulation of data. The vulnerability affects versions 1.0.0 and earlier, with a fix available in version 2.5.4. Microsoft has released a patch to address this issue.
The core impact of CVE-2025-64663 lies in its ability to grant an attacker elevated privileges within the Azure Cognitive Service for Language environment. Specifically, an authenticated user could potentially bypass intended access controls and perform actions they are not authorized to do. This could include accessing sensitive data, modifying configurations, or even executing arbitrary code within the service's context. The blast radius extends to any data processed by the Cognitive Service, potentially impacting downstream applications and systems that rely on its output. Successful exploitation could lead to significant data breaches, service disruption, and reputational damage.
CVE-2025-64663 was publicly disclosed on December 18, 2025. The CVSS score of 9.9 (CRITICAL) indicates a high probability of exploitation. As of this writing, there are no publicly available proof-of-concept exploits, but the severity of the vulnerability warrants immediate attention. It is not currently listed on the CISA KEV catalog, but its criticality suggests it could be added in the future. Monitor security advisories and threat intelligence feeds for any signs of active exploitation.
Exploit Status
EPSS
0.06% (18% percentile)
CISA SSVC
CVSS Vector
The primary mitigation for CVE-2025-64663 is to upgrade to version 2.5.4 of the Azure Cognitive Service for Language. Prior to upgrading, it's crucial to review Microsoft's official documentation for any potential breaking changes and to test the upgrade in a non-production environment. While a direct workaround isn't available, implementing strict role-based access control (RBAC) policies within Azure can limit the potential impact of a successful exploit by restricting the actions an attacker can perform even with elevated privileges. Regularly review and audit access permissions to ensure they adhere to the principle of least privilege.
Microsoft has released an update for Azure Cognitive Service for Language that addresses this vulnerability. Update to version 2.5.4 or later to mitigate the risk. Refer to the Microsoft update guide for detailed instructions on how to apply the update.
Vulnerability analysis and critical alerts directly to your inbox.
CVE-2025-64663 is a critical elevation of privilege vulnerability in Azure Cognitive Service for Language, allowing attackers to bypass access controls and gain unauthorized access.
Yes, if you are using Azure Cognitive Service for Language version 1.0.0 or earlier, you are affected by this vulnerability.
Upgrade to version 2.5.4 of Azure Cognitive Service for Language. Review Microsoft's documentation for potential breaking changes before upgrading.
While no public exploits are currently available, the vulnerability's criticality suggests a high probability of exploitation. Monitor security advisories.
Refer to the official Microsoft Security Update Guide for details: [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-64663](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-64663)
Upload your dependency file and we'll tell you instantly if this and other CVEs hit you.