CVE-2026-108457
Microsoft Windows PDF Remote Code Execution Vulnerability
Microsoft Windows 10 Version 21H2Operating systems
CVSS
8.1HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.69%Chance of exploitation activity in the next 30 days, higher than 52% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 10.0.19044.7807Windows 10 Version 21H2CVE List
- 10.0.19045.7807Windows 10 Version 22H2CVE List
- 10.0.22631.7652Windows 11 version 23H2CVE List
- 10.0.22631.7652Windows 11 Version 23H2CVE List
- 10.0.20348.5761Windows Server 2022CVE List
- 10.0.26100.33650Windows Server 2025CVE List
Show all 7 fixed versions
- 10.0.26100.33650Windows Server 2025 (Server Core installation)CVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Vendor and government advisories 1
Vendors that say their products are affected, and agencies that issued alerts. Check each for the fixed release of the product you run.
Reports 1
1 outlet mention it. Reports are not confirmation; each links to its source.
Description
Out-of-bounds write in Microsoft Windows PDF allows an unauthorized attacker to execute code over a network.
Text from CVE List
Affected versions 7
- Windows 10 Version 21H2affected: 10.0.19044.0 before 10.0.19044.7807CVE List
- Windows 10 Version 22H2affected: 10.0.19045.0 before 10.0.19045.7807CVE List
- Windows 11 version 23H2affected: 10.0.22631.0 before 10.0.22631.7652CVE List
- Windows 11 Version 23H2affected: 10.0.22631.0 before 10.0.22631.7652CVE List
- Windows Server 2022affected: 10.0.20348.0 before 10.0.20348.5761CVE List
- Windows Server 2025affected: 10.0.26100.0 before 10.0.26100.33650CVE List
- Windows Server 2025 (Server Core installation)affected: 10.0.26100.0 before 10.0.26100.33650CVE List