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CVE-2026-108136: Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges local

38
Routine
HIGH 7.8WATCHLISTUPGRADEUPGRADEUPGRADE

CVE-2026-108136 is a high-severity flaw (CVSS 7.8) 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 Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

Why this priority

  • High severity
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score7.8 (High)
Attack vectorLocal
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.3% (top 77%)
CISA exploited listNo
WeaknessCWE-416
Published2026-10-13
Last modified2026-10-23
Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

microsoft windows 10 1607 UPGRADE
Affected: < 10.0.14393.9612
Fixed in: 10.0.14393.9612
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: < 10.0.17763.9376
Fixed in: 10.0.17763.9376
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: < 10.0.19044.7807
Fixed in: 10.0.19044.7807
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: < 10.0.19045.7807
Fixed in: 10.0.19045.7807
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: < 10.0.22631.7652
Fixed in: 10.0.22631.7652
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: < 10.0.26100.9711
Fixed in: 10.0.26100.9711
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 · clementine · FIXED · 1.4.2-1.fc46 · FEDORA-2026-3e748ef4d3 · source
sudo dnf upgrade --advisory=FEDORA-2026-3e748ef4d3
Windows Server 2012 · KB5126835 · FIXED · 6.2.9200.26434 · KB5126835 · source
Install KB5126835 via Windows Update, then verify: Get-HotFix -Id KB5126835
Windows Server 2012 (Server Core installation) · KB5126835 · FIXED · 6.2.9200.26434 · KB5126835 · source
Install KB5126835 via Windows Update, then verify: Get-HotFix -Id KB5126835
Windows Server 2012 R2 · KB5126836 · FIXED · 6.3.9600.23470 · KB5126836 · source
Install KB5126836 via Windows Update, then verify: Get-HotFix -Id KB5126836
Windows Server 2012 R2 (Server Core installation) · KB5126836 · FIXED · 6.3.9600.23470 · KB5126836 · source
Install KB5126836 via Windows Update, then verify: Get-HotFix -Id KB5126836
Windows 10 Version 1607 for 32-bit Systems · KB5126868 · FIXED · 10.0.14393.9612 · KB5126868 · source
Install KB5126868 via Windows Update, then verify: Get-HotFix -Id KB5126868
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.

Quick answers

How do I fix CVE-2026-108136?

windows 10 1607: upgrade to 10.0.14393.9612; windows 10 1809: upgrade to 10.0.17763.9376; windows 10 21h2: upgrade to 10.0.19044.7807. Exact commands for each OS are on this page.

Is CVE-2026-108136 being exploited?

CVE-2026-108136 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-108136 affect?

CVE-2026-108136 affects windows 10 1607, windows 10 1809, windows 10 21h2. Severity is high (CVSS 7.8). Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

How urgent is CVE-2026-108136?

Priority 38/100. High severity; On your watchlist

Software pages

Windows vulnerabilities

Related CVEs

References

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