CVE-2026-59124 Microsoft High Performance Computing (HPC) Pack Remote Code Execution Vulnerability
An unauthorized attacker can execute code over the network via deserialization of untrusted data in Microsoft HPC Pack.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-59124?
CVE-2026-59124 is a critical unsafe deserialization vulnerability in Microsoft HPC Pack 2019, published on 11 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Deserialization of untrusted data in Microsoft High Performance Computing (HPC) Pack allows an unauthorized attacker to execute code over a network.
Weakness: CWE-502
Which versions are affected by CVE-2026-59124?
It affects 1 product.
Products include Microsoft Windows App.
How do I fix CVE-2026-59124?
No fix has been published for CVE-2026-59124 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-59124 being exploited?
There is no known exploitation of CVE-2026-59124 in the wild and no public exploit code.
Other vulnerabilities in Microsoft HPC Pack 2019
- CVE-2026-59133 Microsoft High Performance Computing (HPC) Pack Elevation of Privilege Vulnerability
- CVE-2020-0919 Privilege escalation in Microsoft Remote Desktop for Mac
- CVE-2026-69550 Windows App for Mac Information Disclosure Vulnerability
- CVE-2026-23656 Windows App Installer Spoofing Vulnerability
- CVE-2026-21517 Windows App for Mac Installer Elevation of Privilege Vulnerability
Sources
Also known as GHSA-cxrf-6fm5-464m.