Multiple vulnerabilities in Microsoft Brokering File System



Risk Low
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2025-49693
CVE-2025-49677
CVE-2025-49694
CWE-ID CWE-415
CWE-416
CWE-476
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Windows
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Double free

EUVDB-ID: #VU112575

Risk: Low

CVSSv4.0: 5.9 [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]

CVE-ID: CVE-2025-49693

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in Microsoft Brokering File System. A local user can pass specially crafted data to the application, trigger double free error and execute arbitrary code on the target system with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 10 1607 10.0.14393.10 - 11 24H2 10.0.26100.4349

Windows Server: 2022 10.0.20348.202 - 2025 10.0.26100.4349

CPE2.3 External links

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49693


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Use-after-free

EUVDB-ID: #VU112577

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-49677

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Microsoft Brokering File System. A local user can gain elevated privileges on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 10 1607 10.0.14393.10 - 11 22H2 10.0.22621.5472

CPE2.3 External links

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49677


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) NULL pointer dereference

EUVDB-ID: #VU112576

Risk: Low

CVSSv4.0: 5.9 [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]

CVE-ID: CVE-2025-49694

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a NULL pointer dereference error in Microsoft Brokering File System. A local user can pass specially crafted data to the application and gain elevated privileges on the target system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Windows Server: 2022 10.0.20348.202 - 2025 10.0.26100.4349

Windows: 10 1607 10.0.14393.10 - 11 24H2 10.0.26100.4349

CPE2.3 External links

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49694


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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