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.
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.
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)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.8 | 3.0 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
| 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:*:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://www.securitytracker.com/id/1041169 | Third Party Advisory VDB Entry |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nx-os-fabric-dos | Vendor Advisory |