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CVE-2017-3879

16
FAUCET Score

CVE-2017-3879 describes a Denial of Service vulnerability in the remote login functionality of Cisco NX-OS Software on Cisco Nexus 9000 Series Switches, allowing an unauthenticated, remote attacker to disrupt login attempts via Telnet or SSH. The vulnerability has a CVSS score of 5.3 (Medium), indicating a network-based attack with low complexity that can cause a partial denial of service to login processes without impacting user traffic. There is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
7.0\(3\)i3\(0.170\)CPE matchmatch criteria
cpe:2.3:o:cisco:nx-os:7.0\(3\)i3\(0.170\):*:*:*:*:*:*:*
8.3\(0\)cv\(0.342\)CPE matchmatch criteria
cpe:2.3:o:cisco:nx-os:8.3\(0\)cv\(0.342\):*:*:*:*:*:*:*
8.3\(0\)cv\(0.345\)CPE matchmatch criteria
cpe:2.3:o:cisco:nx-os:8.3\(0\)cv\(0.345\):*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.95%
Probability of exploitation in next 30 days
EPSS Percentile
85.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0295 is in the 80th percentile among its peer group of 23,705 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 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-20170315-nss1
Vendor Advisory
securityfocus.com / bid/96920
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038046