CVE-2026-45491: CWE-59: Improper Link Resolution Before File Access ('Link Following') in Microsoft .NET 10.0
Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.
AI Analysis
Technical Summary
This vulnerability, identified as CWE-59, affects Microsoft .NET 10.0 and involves improper link resolution before file access. An unauthorized attacker with local access can exploit this flaw to tamper with files by leveraging symbolic link resolution issues. The CVSS 3.1 base score is 6.2, indicating medium severity, with the attack vector limited to local access and no privileges required. Microsoft has published an official fix to address this issue.
Potential Impact
The vulnerability allows an unauthorized local attacker to tamper with files due to improper handling of symbolic links before file access. There is no impact on confidentiality or availability, but integrity can be compromised. No known exploits are reported in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the vendor-provided patch as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45491 to remediate this vulnerability.
CVE-2026-45491: CWE-59: Improper Link Resolution Before File Access ('Link Following') in Microsoft .NET 10.0
Description
Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.
CVSS v3.1
Score 6.2medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-59, affects Microsoft .NET 10.0 and involves improper link resolution before file access. An unauthorized attacker with local access can exploit this flaw to tamper with files by leveraging symbolic link resolution issues. The CVSS 3.1 base score is 6.2, indicating medium severity, with the attack vector limited to local access and no privileges required. Microsoft has published an official fix to address this issue.
Potential Impact
The vulnerability allows an unauthorized local attacker to tamper with files due to improper handling of symbolic links before file access. There is no impact on confidentiality or availability, but integrity can be compromised. No known exploits are reported in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the vendor-provided patch as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45491 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-12T16:07:22.618Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45491","vendor":"Microsoft"}]
Threat ID: 6a284cdf8dd33fbd85664d9d
Added to database: 6/9/2026, 5:26:55 PM
Last enriched: 6/9/2026, 10:12:22 PM
Last updated: 6/10/2026, 5:05:12 AM
Views: 2
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