FORTINET Security Advisory
Published Date: Not specified
Advisory Summary
- CVE/Advisory
- Affected Products/Components: FortiOS, FortiProxy, FortiSwitch (via newcli daemon)
- Issue Type: Double Free — CWE-415
- Impact: A local authenticated attacker can trigger a crash of the newcli daemon using crafted CLI commands
- Severity (CVSSv3): 2.1 (Low)
- Revised: 2026-10-13
⚠️ Why This Matters (Operational & Security Angle)
Even with a low CVSS score, service crashes can create temporary control-plane instability—especially in environments where administrators rely on CLI-driven automation, orchestration, or incident response. If an attacker has authenticated CLI access, this can become a reliability/availability and operational risk vector.
- Attacker must be locally authenticated (i.e., has valid credentials/access path)
- Exploit requires crafted CLI commands reaching newcli via the affected interfaces
âś… Recommended Actions (Market-Ready Guidance)
1. Apply the PSIRT patch/upgrade for FG-IR-26-182 across FortiOS / FortiProxy / FortiSwitch deployments.
2. Audit local admin access paths: reduce exposure of CLI access (management VLANs, admin interfaces, jump hosts).
3. Harden authentication & access: enforce MFA where available, restrict admin roles, and remove unused accounts.
4. Monitor for signs of instability: look for newcli crashes and related management-plane errors; correlate with admin activity logs.
5. If immediate patching isn’t possible: temporarily limit local CLI access to trusted management hosts only.
🧯 Key Security Takeaway
This is a targeted post-auth crash condition. The best risk reduction comes from credential/access hardening plus prompt patching to eliminate the underlying memory handling flaw.
Reference: Vendor Advisory