CVE-2026-87665 Brocade Fabric OS - Denial of Service

Brocade Fabric OS < 10.0.1 contains a stack-based buffer overflow caused by processing oversized Nonce payloads in IKEv2 protocol handler on IPsec-enabled FCIP circuits, letting unauthenticated remote attackers cause denial of service via crafted UDP packets on port 500.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.79% 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
8 October 2026
Updated
15 October 2026
Weakness
CWE-121

Vendor fix

Update to version 10.0.1 or later.

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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