CVE-2026-87663: An authentication bypass and command injection vulnerability exists in the inter-switch remote execution servi

Q: How do I fix CVE-2026-87663?

fabric operating system: upgrade to 9.2.2d, 10.0.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-87663 being exploited?

CVE-2026-87663 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-87663 affect?

CVE-2026-87663 affects fabric operating system. Severity is medium (CVSS 6.7). An authentication bypass and command injection vulnerability exists in the inter-switch remote execution service of Brocade Fabric OS versions before 9.2.2d and 10.0.0 through 10.0.0a1. When processing remote command execution IPC frames ac

Q: How urgent is CVE-2026-87663?

Priority 36/100. No elevated risk signals yet.

Routine

MEDIUM 6.7UPGRADE

CVE-2026-87663 is a medium-severity flaw (CVSS 6.7) affecting fabric operating system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An authentication bypass and command injection vulnerability exists in the inter-switch remote execution service of Brocade Fabric OS versions before 9.2.2d and 10.0.0 through 10.0.0a1. When processing remote command execution IPC frames across the fabric, the receiving switch processes these commands at an elevated processing level without proper verification of transmitted parameters. This allows an attacker on a single fabric-connected switch

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.7 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-290
Published	2026-10-08
Last modified	2026-10-14

Publisher (CNA): Brocade Communications Systems, LLC · Vendor: broadcom

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-08 05:17 UTCPublished CVE record published
2026-10-14 19:33 UTCUpdated Record last modified

broadcom fabric operating system UPGRADE

Affected: < 9.2.2d · >= 10.0.0 and < 10.0.1

Fixed in: 9.2.2d, 10.0.1

Safe to downgrade to: a release before 10.0.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-87663?

fabric operating system: upgrade to 9.2.2d, 10.0.1. Exact commands for each OS are on this page.

Is CVE-2026-87663 being exploited?

CVE-2026-87663 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-87663 affect?

CVE-2026-87663 affects fabric operating system. Severity is medium (CVSS 6.7). An authentication bypass and command injection vulnerability exists in the inter-switch remote execution service of Brocade Fabric OS versions before 9.2.2d and 10.0.0 through 10.0.0a1. When processing remote command execution IPC frames ac

How urgent is CVE-2026-87663?

Priority 36/100. No elevated risk signals yet.

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References

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