HOMEVULNERABILITIESCVE-2019-1804
CRITICAL

CVE-2019-1804

CWE-310Published: May 3, 2019· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

A vulnerability in the SSH key management for the Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software could allow an unauthenticated, remote attacker to connect to the affected system with the privileges of the root user. The vulnerability is due to the presence of a default SSH key pair that is present in all devices. An attacker could exploit this vulnerability by opening an SSH connection via IPv6 to a targeted device using the extracted key materials. An exploit could allow the attacker to access the system with the privileges of the root user. This vulnerability is only exploitable over IPv6; IPv4 is not vulnerable.

NVD Source

Technical Analysis

CVE-2019-1804 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Cisco26 product(s)
nexus 9332pq firmwarenexus 9332pqnexus 93180yc-ex firmwarenexus 93180yc-exnexus 93128tx firmwarenexus 93128txnexus 93120tx firmwarenexus 93120txnexus 93108tc-ex firmwarenexus 93108tc-exnexus 9516 firmwarenexus 9516+14
Source: NVD CPE · 26 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-nexus9k-sshkey
ADVISORYhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-nexus9k-sshkey

All References (2)

→
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-nexus9k-sshkeyVendor Advisory
→
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-nexus9k-sshkeyVendor Advisory

Quick Facts

CVE IDCVE-2019-1804
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-310
CISA KEVNo
Affected1 vendor(s)
PublishedMay 3, 2019

Related CVEs (CWE-310)

CVE-2013-0137
10.0
CVE-2010-2468
10.0
CVE-2006-0270
10.0
CVE-2009-1174
10.0
CVE-2006-5982
10.0
CVE-2014-7878
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-1804 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2019-1804·NVD