CVE-2025-21173 is a high-severity elevation of privilege vulnerability affecting Microsoft .NET and Visual Studio 2022. This vulnerability allows local attackers to gain elevated privileges, which poses a significant risk to organizations utilizing these technologies. With a CVSS score of 7.3, the vulnerability falls into the high severity category, highlighting the urgency for organizations to address it promptly.
The exploitation of this vulnerability could lead to unauthorized access and manipulation of sensitive data, potentially compromising the integrity and confidentiality of the affected systems. The risk to organizations includes significant operational disruptions and reputational damage. As such, organizations should prioritize patching immediately.
Currently, there are no known public exploits, and the vulnerability is not listed in the Known Exploited Vulnerabilities (KEV) catalog. However, it is essential for defenders to stay vigilant and monitor for any emerging threats related to this CVE.
Organizations should address this vulnerability in their priority patch cycle to mitigate any potential risks associated with its exploitation.
Vulnerability Details
The official description of CVE-2025-21173 identifies it as a .NET Elevation of Privilege Vulnerability. The vulnerability is classified under CWE-379, which pertains to the improper handling of special elements. It has a CVSS v3.1 score of 7.3, indicating a high severity level that necessitates immediate attention.
The vulnerability affects Microsoft Visual Studio 2022 and .NET versions 8.0.0 and 9.0.0. It was published on January 14, 2025, and has undergone modifications as of May 6, 2025.
Technical Analysis
The root cause of the vulnerability lies in insufficient validation of user input, leading to the potential elevation of privileges for local attackers. The attack vector for this vulnerability is local, meaning that an attacker must have physical or logical access to the system to exploit it.
The attack complexity is rated as low, indicating that the vulnerability can be easily exploited by an attacker with low skill. Privileges required for exploitation are also low, making it accessible to a broader range of potential attackers. User interaction is required for successful exploitation, which means that some level of user engagement is necessary for the attack to occur.
The confidentiality, integrity, and availability impacts are all rated as high, indicating that successful exploitation could lead to significant data breaches and system disruptions.
Risk & Impact Analysis
The real-world deployment risk associated with CVE-2025-21173 is considerable, especially for organizations that rely heavily on Microsoft .NET and Visual Studio 2022 in their development processes. The potential for attackers to leverage this vulnerability to gain unauthorized access to systems could lead to severe operational disruptions and data breaches.
Given its high CVSS score, organizations should take immediate action to patch affected systems. The blast radius for this vulnerability could be extensive, affecting all users of the vulnerable software versions. Organizations should address this vulnerability in their priority patch cycle to mitigate any potential risks.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The following versions are affected by CVE-2025-21173: Microsoft Visual Studio 2022 versions 17.6.0 to 17.6.21, 17.8.0 to 17.8.16, 17.10.0 to 17.10.9, and 17.12.0 to 17.12.3; .NET versions 8.0.0 and 9.0.0. Organizations should ensure they update to the latest patched versions.
Mitigation & Remediation
Organizations should prioritize patching affected systems immediately. Recommended actions include upgrading to the latest versions of Visual Studio 2022 and .NET. For those unable to patch, implementing configuration hardening and network controls can mitigate risks. Regular monitoring for suspicious activity is also advised.
Detection Guidance
Monitoring logs for unusual access patterns and user behavior can help detect potential exploitation attempts. Observing for changes in system configurations or unexpected application behaviors should also be part of the detection strategy.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-21173 lies in its representation of vulnerabilities within widely used development platforms, emphasizing the need for robust security practices. Security teams should take this as a lesson to enhance their vulnerability management programs and invest in continuous security testing. To stay ahead of emerging threats, organizations are encouraged to adopt a proactive approach towards penetration testing, such as through penetration testing and regular security assessments.
To further enhance their security posture, organizations should consider implementing a comprehensive application security assessment to identify and remediate vulnerabilities proactively.
In conclusion, CVE-2025-21173 serves as a critical reminder of the importance of maintaining updated software and implementing strong security practices within development environments. Organizations should remain vigilant and responsive to vulnerabilities to protect their assets.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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