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CVE-2020-3446

26
FAUCET Score

CVE-2020-3446 describes a critical vulnerability in Cisco Virtual Wide Area Application Services (vWAAS) when bundled with Cisco Enterprise NFV Infrastructure Software (NFVIS) for ENCS 5400-W and CSP 5000-W Series appliances. This flaw allows unauthenticated, remote attackers to gain administrator access to the NFVIS CLI due to default, static passwords. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with no user interaction, leading to complete compromise of confidentiality, integrity, and availability. While not listed in CISA's KEV catalog, its high FAUCET Risk Score of 81/100, community discussion, and media coverage indicate significant concern, though public exploit code is not currently available.

Impacted Technologies

VendorProductVersion(s)CPE
6.4\(1\)CPE matchmatch criteria
cpe:2.3:o:cisco:encs_5406-w_firmware:6.4\(1\):*:*:*:*:*:*:*
6.4\(3d\)CPE matchmatch criteria
cpe:2.3:o:cisco:encs_5406-w_firmware:6.4\(3d\):*:*:*:*:*:*:*
6.4\(1\)CPE matchmatch criteria
cpe:2.3:o:cisco:encs_5408-w_firmware:6.4\(1\):*:*:*:*:*:*:*
6.4\(3d\)CPE matchmatch criteria
cpe:2.3:o:cisco:encs_5408-w_firmware:6.4\(3d\):*:*:*:*:*:*:*
6.4\(1\)CPE matchmatch criteria
cpe:2.3:o:cisco:encs_5412-w_firmware:6.4\(1\):*:*:*:*:*:*:*

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
1.39%
Probability of exploitation in next 30 days
EPSS Percentile
69.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0139 is in the 56th percentile among its peer group of 36,897 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-waas-encsw-cspw-cred-hZzL29A7
Vendor Advisory