CVE-2026-70337: Microsoft PowerShell Remote Code Execution Vulnerability
Relative path traversal in Microsoft PowerShell Core allows an unauthorized attacker to execute code over a network.
CSIRTS triage
- What
- Relative path traversal in PowerShell Core allows remote code execution.
- Who is affected
- Deployments of PowerShell Core running on networks where untrusted input can reach the application.
- Urgency
- High; CVSS 8.8 with active network attack vector and no known exploitation but unpatched systems remain at significant risk.
- Action
- Update PowerShell Core to the patched version when available from Microsoft.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70337
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-703370.76% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 52% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-70337 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- high[NEW] [high] Microsoft Developer Tools: Multiple Vulnerabilitiescert-bund
- unknownMultiple vulnerabilities in Microsoft products (August 12, 2026)cert-fr-avis
- unknownNCSC-2026-0285 [1.00] [M/H] Vulnerabilities patched in Microsoft Developer Toolsncsc-nl
- highCVE-2026-70337: Relative path traversal in Microsoft PowerShell Core allows an unauthorized attacker to execut…nvd
Recent advisories for Microsoft PowerShell Remote
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highCVE-2026-50523: Microsoft PowerShell Remote Code Execution Vulnerabilitymsrc · 2026-08-11
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