How severe is CVE-2018-6434?

CVE-2018-6434 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2018-6434 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6434?

CVE-2018-6434 affects Broadcom Fabric Operating System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6434?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-6434 published?

CVE-2018-6434 was published on 2018-11-08 and last updated on 2026-06-17.

CVE-2018-6434

CVE-2018-6434 is a high-severity vulnerability in Broadcom Fabric Operating System with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-384.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-384
Affected product: Broadcom Fabric Operating System
Published: 2018-11-08
Last modified: 2026-06-17

Description

A vulnerability in the web management interface of Brocade Fabric OS versions before 8.2.1, 8.1.2f, 8.0.2f, 7.4.2d could allow attackers to intercept or manipulate a user's session ID.

Frequently asked questions

What is CVE-2018-6434?: A vulnerability in the web management interface of Brocade Fabric OS versions before 8.2.1, 8.1.2f, 8.0.2f, 7.4.2d could allow attackers to intercept or manipulate a user's session ID.
How severe is CVE-2018-6434?: CVE-2018-6434 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2018-6434 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6434?: CVE-2018-6434 affects Broadcom Fabric Operating System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6434?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-6434 published?: CVE-2018-6434 was published on 2018-11-08 and last updated on 2026-06-17.

References

https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2018-736

Affected products (1)

cpe:2.3:o:broadcom:fabric_operating_system:*:*:*:*:*:*:*:*

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