SB2026061130 - Multiple vulnerabilities in Microsoft Windows DWM Core Library
Published: June 11, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 10 vulnerabilities.
1) Out-of-bounds read (CVE-ID: CVE-2026-48566)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in Windows DWM Core Library. A local user can trigger an out-of-bounds read error and read contents of memory on the system.
2) Use-after-free (CVE-ID: CVE-2026-44804)
CWE-ID: CWE-416 - Use After Free
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 user to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in Windows DWM Core Library. A local user can gain eelvated privileges on the target system.
3) Use-after-free (CVE-ID: CVE-2026-44813)
CWE-ID: CWE-416 - Use After Free
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 user to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in Windows DWM Core Library. A local user can gain eelvated privileges on the target system.
4) Out-of-bounds read (CVE-ID: CVE-2026-44814)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in Windows DWM Core Library. A local user can trigger an out-of-bounds read error and read contents of memory on the system.
5) Use-after-free (CVE-ID: CVE-2026-44802)
CWE-ID: CWE-416 - Use After Free
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 user to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in Windows DWM Core Library. A local user can gain eelvated privileges on the target system.
6) Use-after-free (CVE-ID: CVE-2026-42983)
CWE-ID: CWE-416 - Use After Free
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 user to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in Windows DWM Core Library. A local user can gain eelvated privileges on the target system.
7) Use-after-free (CVE-ID: CVE-2026-44807)
CWE-ID: CWE-416 - Use After Free
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 user to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in Windows DWM Core Library. A local user can gain elevated privileges on the target system.
8) Heap-based buffer overflow (CVE-ID: CVE-2026-44808)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
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 user to escalate privileges on the target system.
The vulnerability exists due to a boundary error in Windows DWM Core Library. A local user can pass specially crafted data to the application, trigger a heap-based buffer overflow and gain elevated privileges on the system.
9) Heap-based buffer overflow (CVE-ID: CVE-2026-44811)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
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 user to escalate privileges on the target system.
The vulnerability exists due to a boundary error in Windows DWM Core Library. A local user can pass specially crafted data to the application, trigger a heap-based buffer overflow and gain elevated privileges on the system.
10) Use-after-free (CVE-ID: CVE-2026-42905)
CWE-ID: CWE-416 - Use After Free
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 user to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in Windows DWM Core Library. A local user can gain elevated privileges on the target system.
Remediation
Install update from vendor's website.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48566
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44804
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44813
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44814
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44802
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42983
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44807
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44808
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44811
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42905