What is CVE-2026-122194?
Null pointer dereference in Microsoft Defender allows an unauthorized attacker to execute code over a network.
The record classifies CVE-2026-122194 under weakness class CWE-476. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 1 day ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 8.8 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 4.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-11-10
Is CVE-2026-122194 being exploited?
It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.
Affected products and versions
- Microsoft: Malware Protection Engine
How to fix CVE-2026-122194
Patch reference: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-122194. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2026-122194
2 tracked threats in the Threadlinqs corpus reference CVE-2026-122194, either in the campaign’s CVE list or as an indicator on the campaign record.
- Microsoft Patch Tuesday November 2026: ~1,095 vulnerabilities, 64 critical, one exploited Outlook NTLM-leak spoofing zero-day (CVE-2026-124194) — CRITICAL · 2026-11-11
- Microsoft November 2026 Patch Tuesday: Outlook Zero-Day CVE-2026-124194 Exploited to Steal NTLM Hashes (1,235 Flaws Fixed) — HIGH · 2026-11-10
Sources
Enriched from CVE.org, NVD. This product uses the NVD API but is not endorsed or certified by the NVD.