PatchTheCVECVE-2026-70033: Missing release of memory after effective lifetime in Remote Desktop Gateway Service allows an unauthorized at
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HIGH 7.5REMOTEWATCHLISTUPGRADEUPGRADEMITIGATE
CVE-2026-70033 is a high-severity flaw (CVSS 7.5) affecting windows 10 1607, windows 10 1809, windows server 2012. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Missing release of memory after effective lifetime in Remote Desktop Gateway Service allows an unauthorized attacker to deny service over a network.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.3% (top 30%) |
| CISA exploited list | No |
| Weakness | CWE-401 |
| Published | 2026-10-13 |
| Last modified | 2026-10-16 |
Publisher (CNA): Microsoft Corporation · Vendor: microsoft
Last updated 2026-10-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
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 server 2012 MITIGATE
Affected: all versions · r2
Fixed in: no fixed release known
Safe to downgrade to: a release before r2
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 server 2016 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 server 2019 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 server 2022 UPGRADE
Affected: < 10.0.20348.5761
Fixed in: 10.0.20348.5761
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
A distro patch exists: prefer upgrading over downgrading.
Fedora ELN · edk2 · FIXED · 20260812-12.eln159 · FEDORA-2026-e316b6370a · source
sudo dnf upgrade --advisory=FEDORA-2026-e316b6370a
Fedora 46 · perl-Mojo-DOM58 · FIXED · 3.003-1.fc46 · FEDORA-2026-d5412af3de · source
sudo dnf upgrade --advisory=FEDORA-2026-d5412af3de
Windows 10 Version 1809 for 32-bit Systems · KB5126651 · FIXED · 10.0.17763.9376 · KB5126651 · source
Install KB5126651 via Windows Update, then verify:
Get-HotFix -Id KB5126651
Windows 10 Version 1809 for x64-based Systems · KB5126651 · FIXED · 10.0.17763.9376 · KB5126651 · source
Install KB5126651 via Windows Update, then verify:
Get-HotFix -Id KB5126651
Install KB5126651 via Windows Update, then verify:
Get-HotFix -Id KB5126651
Windows Server 2019 (Server Core installation) · KB5126651 · FIXED · 10.0.17763.9376 · KB5126651 · source
Install KB5126651 via Windows Update, then verify:
Get-HotFix -Id KB5126651
Install KB5126655 via Windows Update, then verify:
Get-HotFix -Id KB5126655
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.
Quick answers
How do I fix CVE-2026-70033?
windows 10 1607: upgrade to 10.0.14393.9612; windows 10 1809: upgrade to 10.0.17763.9376; windows server 2012: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2026-70033 being exploited?
CVE-2026-70033 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-2026-70033 affect?
CVE-2026-70033 affects windows 10 1607, windows 10 1809, windows server 2012. Severity is high (CVSS 7.5). Missing release of memory after effective lifetime in Remote Desktop Gateway Service allows an unauthorized attacker to deny service over a network.
How urgent is CVE-2026-70033?
Priority 54/100. High severity; Remotely exploitable, no login, no user action; On your watchlist
Software pages
Windows vulnerabilities · Windows Server vulnerabilities · WinRM and RDP vulnerabilities
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