How severe is CVE-2017-6655?

CVE-2017-6655 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2017-6655 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-6655?

CVE-2017-6655 primarily affects Cisco Mds 9000 Nx-os. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-6655?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-6655 published?

CVE-2017-6655 was published on 2017-06-13 and last updated on 2026-06-17.

CVE-2017-6655

CVE-2017-6655 is a medium-severity vulnerability in Cisco Mds 9000 Nx-os with a CVSS 3.x base score of 6.5. 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-119.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 3.3
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Cisco Mds 9000 Nx-os
Published: 2017-06-13
Last modified: 2026-06-17

Description

A vulnerability in the Fibre Channel over Ethernet (FCoE) protocol implementation in Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition when an FCoE-related process unexpectedly reloads. This vulnerability affects Cisco NX-OS Software on the following Cisco devices when they are configured for FCoE: Multilayer Director Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches. More Information: CSCvc91729. Known Affected Releases: 8.3(0)CV(0.833). Known Fixed Releases: 8.3(0)ISH(0.62) 8.3(0)CV(0.944) 8.1(1) 8.1(0.8)S0 7.3(2)D1(0.47).

Frequently asked questions

What is CVE-2017-6655?: A vulnerability in the Fibre Channel over Ethernet (FCoE) protocol implementation in Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition when an FCoE-related process unexpectedly reloads. This vulnerability affects Cisco NX-OS Software on the following Cisco devices when they are configured for FCoE: Multilayer Director Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches. More Information: CSCvc91729. Known Affected Releases: 8.3(0)CV(0.833). Known Fixed Releases: 8.3(0)ISH(0.62) 8.3(0)CV(0.944) 8.1(1) 8.1(0.8)S0 7.3(2)D1(0.47).
How severe is CVE-2017-6655?: CVE-2017-6655 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2017-6655 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-6655?: CVE-2017-6655 primarily affects Cisco Mds 9000 Nx-os. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-6655?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-6655 published?: CVE-2017-6655 was published on 2017-06-13 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:cisco:mds_9000_nx-os:7.3\(1\)d1\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:nx-os_for_nexus_5500_platform_switches:7.3\(1\)n1\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:nx-os_for_nexus_5600_platform_switches:7.3\(1\)n1\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:nx-os_for_nexus_7700_series_switches:8.0\(1\)\(ed\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:8.0\(1\)s2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:8.3\(0\)cv\(0.833\):*:*:*:*:*:*:*

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