PatchTheCEVCVE-2026-62795: Use after free in Windows LDAP - Lightweight Directory Access Protocol allows an unauthorized attacker to exec
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HIGH 8.8WATCHLISTUPGRADEUPGRADEUPGRADE
CVE-2026-62795 is a high-severity flaw (CVSS 8.8) affecting windows 10 1607, windows 10 1809, windows 10 21h2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Use after free in Windows LDAP - Lightweight Directory Access Protocol allows an unauthorized attacker to execute code over a network.
Why this priority
- High severity
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.8% (top 43%) |
| CISA exploited list | No |
| Weakness | CWE-416 |
| Published | 2026-08-11 |
| Last modified | 2026-10-23 |
Publisher (CNA): Microsoft Corporation · Vendor: microsoft
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
microsoft windows 10 1607 UPGRADE
Affected: < 10.0.14393.9418
Fixed in: 10.0.14393.9418
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
microsoft windows 10 1809 UPGRADE
Affected: < 10.0.17763.9115
Fixed in: 10.0.17763.9115
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
microsoft windows 10 21h2 UPGRADE
Affected: < 10.0.19044.7663
Fixed in: 10.0.19044.7663
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
microsoft windows 10 22h2 UPGRADE
Affected: < 10.0.19045.7663
Fixed in: 10.0.19045.7663
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
microsoft windows 11 23h2 UPGRADE
Affected: < 10.0.22631.7517
Fixed in: 10.0.22631.7517
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
microsoft windows 11 24h2 UPGRADE
Affected: < 10.0.26100.9106
Fixed in: 10.0.26100.9106
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Exact fixes by distribution
Fedora 46 · diffoscope · FIXED · 335-1.fc46 · FEDORA-2026-e4c4cc0856 · source
sudo dnf upgrade --advisory=FEDORA-2026-e4c4cc0856
Windows 10 Version 1809 for 32-bit Systems · KB5120238 · FIXED · 10.0.17763.9121 · KB5120238 · source
Install KB5120238 via Windows Update, then verify:
Get-HotFix -Id KB5120238
Windows 10 Version 1809 for x64-based Systems · KB5120238 · FIXED · 10.0.17763.9121 · KB5120238 · source
Install KB5120238 via Windows Update, then verify:
Get-HotFix -Id KB5120238
Install KB5120238 via Windows Update, then verify:
Get-HotFix -Id KB5120238
Windows Server 2019 (Server Core installation) · KB5120238 · FIXED · 10.0.17763.9121 · KB5120238 · source
Install KB5120238 via Windows Update, then verify:
Get-HotFix -Id KB5120238
Install KB5120242 via Windows Update, then verify:
Get-HotFix -Id KB5120242
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
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