CVE-2026-108398 | defend.network

What is CVE-2026-108398?

Untrusted search path in .NET Framework allows an authorized attacker to bypass a security feature locally.

CVSS8.8 NVD 3.1

SeverityHIGH

Exploitation In the wild

Triage statusActive Exploit

ActionPatch within 48 hours

CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CWECWE-426

NVD published2026-10-13

NVD last modified2026-10-13

Timeline

2026-10-13Published to the U.S. National Vulnerability Database (NVD)
2026-10-14First covered in a defend.network daily briefing

Affected product

See advisory

Remediation Steps

Apply the vendor security update for Microsoft as a priority.
Restrict network exposure of the affected service to trusted sources until patched.
Review logs and detections for indicators of exploitation.
Confirm fixed versions against the official vendor advisory before deploying.

References

Referenced in our briefings & reports

Vulnerability Priority Report – Week 2 of October 2026 (October 12 – 18)
Microsoft 1,411-flaw Patch Tuesday; Ivanti zero-day root access; OpenAI spy device arrest (2026-10-14)

Browse all tracked CVEs in the defend.network CVE database →

🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.