CVE-2026-86128 Fireware OS - Denial of Service

Fireware OS contains a null pointer dereference vulnerability in the NetFlow packet-processing feature, letting remote unauthenticated attackers cause denial of service by sending specially crafted IPv6 packets.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.36% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
30 September 2026
Updated
15 October 2026
Weakness
CWE-476

Vendor fix

Update to the latest version of Fireware OS.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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