CVE-2026-96951Windows Shell Security Feature Bypass Vulnerability
Updated under an hour ago ()
This data is behind schedule: last updated Oct 28, 2026, 9:10 AM ET. We are working on it.Behind: CVE records (cvelistV5).
Does this affect you?
It affects Microsoft Outlook.com and 16 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Oct 13, 2026; federal agencies had to remediate by Oct 16, 2026. Treat that date as your deadline.
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Improper neutralization of special elements used in a command ('command injection') in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
- Weakness (CWE)
- CWE-77
- Known exploited
- Added to CISA KEV Oct 13, 2026; federal remediation due Oct 16, 2026Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- EPSS (exploitation in the next 30 days)
- 9.81% (percentile 96)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 26, 2026
- First seen by InfoSec Signals
- Oct 13, 2026
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.