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CVE-2018-0312

33
FAUCET Score

CVE-2018-0312 is a critical vulnerability in the Cisco Fabric Services component of Cisco FXOS and NX-OS Software, affecting numerous Cisco Firepower, MDS, Nexus, and UCS products. An unauthenticated, remote attacker can exploit insufficient packet header validation to cause a buffer overflow. This allows for arbitrary code execution or a denial of service (DoS) condition. With a CVSS score of 9.8 (Critical), the attack complexity is low, requiring no user interaction, and has high impact on confidentiality, integrity, and availability. While no public exploit code is available (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
7.3\(2\)d1\(0.49\)CPE matchmatch criteria
cpe:2.3:o:cisco:nexus_7000_firmware:7.3\(2\)d1\(0.49\):*:*:*:*:*:*:*
8.0\(1\)CPE matchmatch criteria
cpe:2.3:o:cisco:nexus_7000_firmware:8.0\(1\):*:*:*:*:*:*:*
8.1\(0.112\)s0CPE matchmatch criteria
cpe:2.3:o:cisco:nexus_7000_firmware:8.1\(0.112\)s0:*:*:*:*:*:*:*
7.0\(0\)hsk\(0.357\)CPE matchmatch criteria
cpe:2.3:o:cisco:nexus_5000_firmware:7.0\(0\)hsk\(0.357\):*:*:*:*:*:*:*
r211CPE matchmatch criteria
cpe:2.3:o:cisco:firepower_9000_firmware:r211:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
5.66%
Probability of exploitation in next 30 days
EPSS Percentile
92.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0566 is in the 87th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-fx-os-cli-execution
Vendor Advisory
securityfocus.com / bid/104515
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041169
Third Party AdvisoryVDB Entry