CVE-2026-56171: Exposure of private personal information to an unauthorized actor in Windows RDP allows an unauthorized attack

Q: How do I fix CVE-2026-56171?

remote desktop web client: upgrade to 2.1.65.2; windows admin center: upgrade to 2606. Exact commands for each OS are on this page.

Q: Is CVE-2026-56171 being exploited?

CVE-2026-56171 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-56171 affect?

CVE-2026-56171 affects remote desktop web client, windows admin center. Severity is high (CVSS 7.1). Exposure of private personal information to an unauthorized actor in Windows RDP allows an unauthorized attacker to disclose information over a network.

Q: How urgent is CVE-2026-56171?

Priority 43/100. High severity; On your watchlist

This month

HIGH 7.1WATCHLISTUPGRADEUPGRADE

CVE-2026-56171 is a high-severity flaw (CVSS 7.1) affecting remote desktop web client, windows admin center. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Exposure of private personal information to an unauthorized actor in Windows RDP allows an unauthorized attacker to disclose information over a network.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 49%)
CISA exploited list	No
Weakness	CWE-359
Published	2026-07-17
Last modified	2026-07-22

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-17 22:17 UTCPublished CVE record published
2026-07-22 18:24 UTCUpdated Record last modified

microsoft remote desktop web client UPGRADE

Affected: < 2.1.65.2

Fixed in: 2.1.65.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy remote-desktop-web-client || rpm -q remote-desktop-web-client || remote-desktop-web-client --version

2. UPGRADE to 2.1.65.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade remote-desktop-web-client

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade remote-desktop-web-client

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

microsoft windows admin center UPGRADE

Affected: < 2606

Fixed in: 2606

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy windows-admin-center || rpm -q windows-admin-center || windows-admin-center --version

2. UPGRADE to 2606 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade windows-admin-center

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade windows-admin-center

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2026-56171?

remote desktop web client: upgrade to 2.1.65.2; windows admin center: upgrade to 2606. Exact commands for each OS are on this page.

Is CVE-2026-56171 being exploited?

CVE-2026-56171 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-2026-56171 affect?

CVE-2026-56171 affects remote desktop web client, windows admin center. Severity is high (CVSS 7.1). Exposure of private personal information to an unauthorized actor in Windows RDP allows an unauthorized attacker to disclose information over a network.

How urgent is CVE-2026-56171?

Priority 43/100. High severity; On your watchlist

Software pages

Windows vulnerabilities · WinRM and RDP vulnerabilities

References

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