CVE-2026-78463: Improper control of generation of code ('code injection') in Remote Desktop Client allows an unauthorized atta

Q: How do I fix CVE-2026-78463?

remote desktop client: upgrade to 1.2.7279. Exact commands for each OS are on this page.

Q: Is CVE-2026-78463 being exploited?

CVE-2026-78463 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-2026-78463 affect?

CVE-2026-78463 affects remote desktop client. Severity is high (CVSS 8.8). Improper control of generation of code ('code injection') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

Q: How urgent is CVE-2026-78463?

Priority 50/100. High severity; On your watchlist

This month

HIGH 8.8WATCHLISTUPGRADE

CVE-2026-78463 is a high-severity flaw (CVSS 8.8) affecting remote desktop client. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper control of generation of code ('code injection') in Remote Desktop Client 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	0.9% (top 42%)
CISA exploited list	No
Weakness	CWE-94
Published	2026-09-08
Last modified	2026-09-22

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-09-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-08 18:20 UTCPublished CVE record published
2026-09-22 13:29 UTCUpdated Record last modified

microsoft remote desktop client UPGRADE

Affected: < 1.2.7279

Fixed in: 1.2.7279

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.2.7279 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade remote-desktop-client

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-2026-78463?

remote desktop client: upgrade to 1.2.7279. Exact commands for each OS are on this page.

Is CVE-2026-78463 being exploited?

CVE-2026-78463 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-2026-78463 affect?

CVE-2026-78463 affects remote desktop client. Severity is high (CVSS 8.8). Improper control of generation of code ('code injection') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

How urgent is CVE-2026-78463?

Priority 50/100. High severity; On your watchlist

Software pages

WinRM and RDP vulnerabilities

Related CVEs

CVE-2026-32157 HIGH 8.8 UPGRADE UPGRADE Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
CVE-2026-80074 HIGH 8.8 UPGRADE Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a net
CVE-2026-80077 HIGH 8.8 UPGRADE Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a net
CVE-2026-57098 HIGH 7.5 UPGRADE Improper verification of cryptographic signature in Windows RDP Client allows an unauthorized attacker to disc

References

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