How severe is CVE-2018-0395?

CVE-2018-0395 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-0395 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-0395?

CVE-2018-0395 primarily affects Cisco 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-2018-0395?

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-2018-0395 published?

CVE-2018-0395 was published on 2018-10-17 and last updated on 2026-06-17.

CVE-2018-0395

CVE-2018-0395 is a high-severity vulnerability in Cisco Nx-os with a CVSS 3.x base score of 8.8. 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-20.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 2.9
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Nx-os
Published: 2018-10-17
Last modified: 2026-06-17

Description

A vulnerability in the Link Layer Discovery Protocol (LLDP) implementation for Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition when the device unexpectedly reloads. The vulnerability is due to improper input validation of certain type, length, value (TLV) fields of the LLDP frame header. An attacker could exploit this vulnerability by sending a crafted LLDP packet to an interface on the targeted device. A successful exploit could allow the attacker to cause the switch to reload unexpectedly.

Frequently asked questions

What is CVE-2018-0395?: A vulnerability in the Link Layer Discovery Protocol (LLDP) implementation for Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition when the device unexpectedly reloads. The vulnerability is due to improper input validation of certain type, length, value (TLV) fields of the LLDP frame header. An attacker could exploit this vulnerability by sending a crafted LLDP packet to an interface on the targeted device. A successful exploit could allow the attacker to cause the switch to reload unexpectedly.
How severe is CVE-2018-0395?: CVE-2018-0395 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-0395 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-0395?: CVE-2018-0395 primarily affects Cisco 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-2018-0395?: 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-2018-0395 published?: CVE-2018-0395 was published on 2018-10-17 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:o:cisco:nx-os:6.0\(4\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.1\(3\)s2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:firepower_extensible_operating_system:r231:*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:r231:*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:12.3\(1e\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:3.2\(3d\)c:*:*:*:*:*:*:*

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