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CVE-2015-6398

21
FAUCET Score

CVE-2015-6398 describes a denial-of-service vulnerability affecting Cisco Nexus 9000 switches operating in Application Centric Infrastructure (ACI) Mode with software versions prior to 11.0(1c). An unauthenticated remote attacker can trigger a device reload by sending a specially crafted IPv4 ICMP packet containing the IP Record Route option. This vulnerability has a CVSSv3 score of 7.5 (HIGH), indicating a high impact on availability with low attack complexity and no user interaction required. While no public exploit code (Metasploit, Nuclei, ExploitDB) is available, the vulnerability has garnered some community discussion and media coverage, though it is not listed in CISA's KEV catalog as actively exploited.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.50\(aazi.0\)c0CPE matchmatch criteria
cpe:2.3:o:zyxel:gs1900-10hp_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.93%
Probability of exploitation in next 30 days
EPSS Percentile
77.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0193 is in the 61st percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 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-20160203-n9knci
Vendor Advisory
securitytracker.com / id/1034928