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CVE-2019-1590

26
FAUCET Score

CVE-2019-1590 is a high-severity vulnerability affecting Cisco Nexus 9000 Series ACI Mode Switch Software, stemming from insufficient TLS client certificate validation. An unauthenticated, remote attacker could exploit this by presenting a valid certificate from the Cisco Manufacturing CA to gain full control over all components within the ACI fabric. The CVSS score of 8.1 (HIGH) reflects its network attack vector, high impact on confidentiality, integrity, and availability, and low attack complexity. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
8.3\(0\)sk\(0.39\)CPE matchmatch criteria
cpe:2.3:o:cisco:nx-os:8.3\(0\)sk\(0.39\):*:*:*:*:*:*:*
14.1\(0.90\)CPE matchmatch criteria
cpe:2.3:o:cisco:nx-os:14.1\(0.90\):*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.99%
Probability of exploitation in next 30 days
EPSS Percentile
58.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0099 is in the 24th percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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-20190501-aci-insecure-fabric
Vendor Advisory