SB2026071706 - Multiple vulnerabilities in Visual Studio
Published: July 17, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 14 vulnerabilities.
1) Input validation error (CVE-ID: CVE-2026-50524)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input validation in .NET Framework when processing input. A remote attacker can send crafted input to cause a denial of service.
2) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2026-47304)
CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to bypass an authentication security feature.
The vulnerability exists due to improper verification of cryptographic signature in .NET when processing cryptographically signed data over a network. A remote attacker can submit crafted signed data to bypass an authentication security feature.
This vulnerability may allow impersonation.
3) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-50525)
CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in .NET when handling network requests. A remote attacker can send network requests to cause a denial of service.
4) Link following (CVE-ID: CVE-2026-50526)
CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to perform tampering.
The vulnerability exists due to improper link resolution before file access in .NET when accessing files through links. A local user can manipulate a link target to perform tampering.
5) Stack-based buffer overflow (CVE-ID: CVE-2026-50527)
CWE-ID: CWE-121 - Stack-based buffer overflow
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to stack-based buffer overflow in .NET Framework when handling network input. A remote attacker can send specially crafted network input to cause a denial of service.
6) Improper access control (CVE-ID: CVE-2026-50528)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to bypass the authentication feature.
The vulnerability exists due to improper access control in .NET authentication handling when processing network requests. A remote attacker can send crafted requests to bypass the authentication feature.
The issue can result in impersonation.
7) Protection mechanism failure (CVE-ID: CVE-2026-50646)
CWE-ID: CWE-693 - Protection Mechanism Failure
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to execute arbitrary code.
The vulnerability exists due to protection mechanism failure in .NET Framework when processing crafted local input. A local attacker can provide crafted local input to execute arbitrary code.
8) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-50648)
CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in .NET Framework when handling network requests. A remote attacker can send crafted requests to cause a denial of service.
9) Deserialization of Untrusted Data (CVE-ID: CVE-2026-50649)
CWE-ID: CWE-502 - Deserialization of Untrusted Data
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to execute arbitrary code.
The vulnerability exists due to deserialization of untrusted data in .NET when processing untrusted serialized data. A local attacker can supply crafted serialized input to execute arbitrary code.
10) Code Injection (CVE-ID: CVE-2026-50650)
CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to escalate privileges.
The vulnerability exists due to improper control of generation of code ('code injection') in .NET Framework when processing crafted local input. A local attacker can inject code to escalate privileges.
Successful exploitation could result in SYSTEM privileges.
11) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-50651)
CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in .NET when handling network requests. A remote attacker can send a series of requests to cause a denial of service.
12) Improper Encoding or Escaping of Output (CVE-ID: CVE-2026-50659)
CWE-ID: CWE-116 - Improper Encoding or Escaping of Output
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote user to perform spoofing.
The vulnerability exists due to improper encoding or escaping of output in .NET for macOS when handling network requests. A remote user can send crafted input to perform spoofing.
13) Type Confusion (CVE-ID: CVE-2026-57108)
CWE-ID: CWE-843 - Type confusion
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to type confusion in .NET Core when handling network requests. A remote attacker can send crafted network input to cause a denial of service.
14) Protection mechanism failure (CVE-ID: CVE-2026-47305)
CWE-ID: CWE-693 - Protection Mechanism Failure
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to execute code locally.
The vulnerability exists due to protection mechanism failure in Visual Studio when handling local access to the application. A local attacker can exploit the protection mechanism failure to execute code locally.
Remediation
Install update from vendor's website.
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-50524
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-47304
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-50525
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-50526
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-50527
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-50528
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-50646
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-50648
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-50649
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-50650
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-50651
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-50659
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-57108
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-47305