CVE-2026-50523

HIGH 7.8 ALL-YEARS

Published 2026-08-14 · Last modified 2026-10-21 · microsoft · NVD: Analyzed

Improper neutralization of special elements used in a command ('command injection') in Microsoft PowerShell allows an authorized attacker to execute code locally.

ELEVATED IMPACT

Severe if exploited (CVSS 7.8), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.3%chance of exploitation in 30 days · 25th percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable no

Impact if exploited

7.8CVSS 3.1 · HIGH · CNA

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

What an attacker needs

⚠Access: Requires local access to the host
⚠Privileges: Requires a low-privilege account
✓User interaction: No user interaction needed
✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

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Affected

Vendors Microsoft

Products Powershell 7.4 Powershell 7.5 Powershell 7.6 Powershell

Weakness (CWE)

CWE-77: : Improper Neutralization of Special Elements used in a Command ('Command Injection')

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

References and research data (JSON)

Known Affected Software Configurations

Vendor	Product	Version range
Microsoft	Powershell	≥ 7.4 and < 7.4.19.0
Microsoft	Powershell	≥ 7.5 and < 7.5.10.0
Microsoft	Powershell	≥ 7.6 and < 7.6.5

All CVSS metrics

HIGH 7.8 v3.1 · CNA Primary
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
HIGH 7.8 v3.1 · NVD Secondary
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Patches & mitigations

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50523 vendor-advisorypatchVendor AdvisoryCVE record · microsoft · Updated 2026-10-21T20:53:11.873Z
NVD · CVE-2026-50523 · Updated 2026-08-18T13:16:20.670

Advisories

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-58808 ADVISORYEUVD · EUVD-2026-58808

Sources: NVD · CVE.org · All sources and attribution · EPSS