CVE-2026-58643: Improper neutralization of input during web page generation ('cross-site scripting') in Windows Admin Center a

Routine

MEDIUM 6.1WATCHLISTUPGRADE

CVE-2026-58643 is a medium-severity flaw (CVSS 6.1) affecting windows admin center. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper neutralization of input during web page generation ('cross-site scripting') in Windows Admin Center allows an unauthorized attacker to perform spoofing over a network.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-07-16
Last modified	2026-10-24

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-16 22:17 UTCPublished CVE record published
2026-10-24 20:10 UTCUpdated Record last modified

microsoft windows admin center UPGRADE

Affected: >= 1809 and < 2511

Fixed in: 2511

Safe to downgrade to: a release before 1809

1. Check installed version

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

2. UPGRADE to 2511 (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.

3. If no update is available yet, DOWNGRADE to a release before 1809 (Debian / Ubuntu)

apt-cache madison windows-admin-center sudo apt install windows-admin-center=<VERSION_BEFORE_1809> sudo apt-mark hold windows-admin-center

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list windows-admin-center sudo dnf downgrade windows-admin-center-<VERSION_BEFORE_1809> sudo dnf versionlock add windows-admin-center

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-58643?

windows admin center: upgrade to 2511. Exact commands for each OS are on this page.

Is CVE-2026-58643 being exploited?

CVE-2026-58643 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-2026-58643 affect?

CVE-2026-58643 affects windows admin center. Severity is medium (CVSS 6.1). Improper neutralization of input during web page generation ('cross-site scripting') in Windows Admin Center allows an unauthorized attacker to perform spoofing over a network.

How urgent is CVE-2026-58643?

Priority 35/100. On your watchlist

Software pages

Windows vulnerabilities

Related CVEs

CVE-2026-56196 HIGH 8.8 UPGRADE Relative path traversal in Windows Admin Center allows an authorized attacker to execute code over a network.
CVE-2026-56197 HIGH 8.8 UPGRADE Improper neutralization of special elements used in a command ('command injection') in Windows Admin Center al
CVE-2026-56169 HIGH 8.1 UPGRADE Improper authentication in Windows Admin Center allows an authorized attacker to elevate privileges over a net
CVE-2026-56185 MEDIUM 6.5 UPGRADE Improper authentication in Windows Admin Center allows an authorized attacker to disclose information over a n
CVE-2026-57107 HIGH 7.8 UPGRADE Improper authentication in Windows Admin Center allows an authorized attacker to elevate privileges locally.

References

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