CVE-2018-0310

A vulnerability in the Cisco Fabric Services component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, remote attacker to obtain sensitive information from memory or cause a denial of service (DoS) condition on the affected product. The vulnerability exists because the affected software insufficiently validates header values in Cisco Fabric Services packets. An attacker could exploit this vulnerability by sending a crafted Cisco Fabric Services packet to an affected device. A successful exploit could allow the attacker to cause a buffer overread condition, which could allow the attacker to obtain sensitive information from memory or cause a DoS condition on the affected product. This vulnerability affects Firepower 4100 Series Next-Generation Firewalls, Firepower 9300 Security Appliance, MDS 9000 Series Multilayer Switches, Nexus 2000 Series Fabric Extenders, Nexus 3000 Series Switches, Nexus 3500 Platform Switches, Nexus 5500 Platform Switches, Nexus 5600 Platform Switches, Nexus 6000 Series Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Nexus 9000 Series Switches in standalone NX-OS mode, Nexus 9500 R-Series Line Cards and Fabric Modules, UCS 6100 Series Fabric Interconnects, UCS 6200 Series Fabric Interconnects, UCS 6300 Series Fabric Interconnects. Cisco Bug IDs: CSCvd69957, CSCve02435, CSCve04859, CSCve41536, CSCve41538, CSCve41559.

Published: 2018-06-21 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2018-0310 is rated High Risk (72.1/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 4.15%). Core evidence: EPSS rose +1.61% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-0310

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 2.55% 4.15% +1.61%
2 2026-04-21 2.56% 2.55% -0.02%
3 2026-03-17 2.56%

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-0310

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
3.9 5.9 [email protected]
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
10.0 10.0 [email protected]

Weakness enumeration for CVE-2018-0310

Affected software / configurations for CVE-2018-0310

Vendor Product Version Raw CPE
cisco nx-os 7.0\(0\)hsk\(0.357\) cpe:2.3:o:cisco:nx-os:7.0\(0\)hsk\(0.357\):*:*:*:*:*:*:*
cisco nx-os 8.1\(0.2\)s0 cpe:2.3:o:cisco:nx-os:8.1\(0.2\)s0:*:*:*:*:*:*:*
cisco nx-os 8.8\(0.1\) cpe:2.3:o:cisco:nx-os:8.8\(0.1\):*:*:*:*:*:*:*
cisco nx-os 8.0\(1\) cpe:2.3:o:cisco:nx-os:8.0\(1\):*:*:*:*:*:*:*
cisco nx-os 8.8\(3.5\)s0 cpe:2.3:o:cisco:nx-os:8.8\(3.5\)s0:*:*:*:*:*:*:*
cisco nx-os 7.0\(3\)i4\(7\) cpe:2.3:o:cisco:nx-os:7.0\(3\)i4\(7\):*:*:*:*:*:*:*
cisco nx-os 7.0\(3\)i7\(1\) cpe:2.3:o:cisco:nx-os:7.0\(3\)i7\(1\):*:*:*:*:*:*:*
cisco nx-os 3.1\(3a\)a cpe:2.3:o:cisco:nx-os:3.1\(3a\)a:*:*:*:*:*:*:*
cisco nx-os 9.9\(0.902\) cpe:2.3:o:cisco:nx-os:9.9\(0.902\):*:*:*:*:*:*:*
cisco firepower_extensible_operating_system >= 1.1, < 1.1.4.179 cpe:2.3:o:cisco:firepower_extensible_operating_system:*:*:*:*:*:*:*:*
cisco firepower_extensible_operating_system >= 2.0, < 2.0.1.153 cpe:2.3:o:cisco:firepower_extensible_operating_system:*:*:*:*:*:*:*:*
cisco firepower_extensible_operating_system >= 2.1.1, < 2.1.1.86 cpe:2.3:o:cisco:firepower_extensible_operating_system:*:*:*:*:*:*:*:*
cisco firepower_extensible_operating_system >= 2.2.1, < 2.2.1.70 cpe:2.3:o:cisco:firepower_extensible_operating_system:*:*:*:*:*:*:*:*
cisco firepower_extensible_operating_system >= 2.2.2, < 2.2.2.17 cpe:2.3:o:cisco:firepower_extensible_operating_system:*:*:*:*:*:*:*:*

References for CVE-2018-0310

cvelogic Threat Intelligence