How severe is CVE-2020-3446?

CVE-2020-3446 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-3446 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3446?

CVE-2020-3446 primarily affects Cisco Encs 5406-w Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-3446?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-3446 published?

CVE-2020-3446 was published on 2020-08-26 and last updated on 2026-06-17.

CVE-2020-3446

CVE-2020-3446 is a critical-severity vulnerability in Cisco Encs 5406-w Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-798.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Cisco Encs 5406-w Firmware
Published: 2020-08-26
Last modified: 2026-06-17

Description

A vulnerability in Cisco Virtual Wide Area Application Services (vWAAS) with Cisco Enterprise NFV Infrastructure Software (NFVIS)-bundled images for Cisco ENCS 5400-W Series and CSP 5000-W Series appliances could allow an unauthenticated, remote attacker to log into the NFVIS CLI of an affected device by using accounts that have a default, static password. The vulnerability exists because the affected software has user accounts with default, static passwords. An attacker with access to the NFVIS CLI of an affected device could exploit this vulnerability by logging into the CLI. A successful exploit could allow the attacker to access the NFVIS CLI with administrator privileges.

Frequently asked questions

What is CVE-2020-3446?: A vulnerability in Cisco Virtual Wide Area Application Services (vWAAS) with Cisco Enterprise NFV Infrastructure Software (NFVIS)-bundled images for Cisco ENCS 5400-W Series and CSP 5000-W Series appliances could allow an unauthenticated, remote attacker to log into the NFVIS CLI of an affected device by using accounts that have a default, static password. The vulnerability exists because the affected software has user accounts with default, static passwords. An attacker with access to the NFVIS CLI of an affected device could exploit this vulnerability by logging into the CLI. A successful exploit could allow the attacker to access the NFVIS CLI with administrator privileges.
How severe is CVE-2020-3446?: CVE-2020-3446 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-3446 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3446?: CVE-2020-3446 primarily affects Cisco Encs 5406-w Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-3446?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-3446 published?: CVE-2020-3446 was published on 2020-08-26 and last updated on 2026-06-17.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-waas-encsw-cspw-cred-hZzL29A7

Affected products (10)

cpe:2.3:o:cisco:encs_5406-w_firmware:6.4\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:encs_5406-w_firmware:6.4\(3d\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:encs_5408-w_firmware:6.4\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:encs_5408-w_firmware:6.4\(3d\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:encs_5412-w_firmware:6.4\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:encs_5412-w_firmware:6.4\(3d\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:csp_5228-w_firmware:6.4\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:csp_5228-w_firmware:6.4\(3d\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:csp_5436-w_firmware:6.4\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:csp_5436-w_firmware:6.4\(3d\):*:*:*:*:*:*:*

Other CWE-798 (Use of Hard-coded Credentials) vulnerabilities

CVE-2026-13768 — Critical (CVSS 10.0): Gardyn devices expose a privileged iothubowner key. Access to this key will allow a malicious user to invoke an IoTHub…
CVE-2026-45631 — Critical (CVSS 10.0): Dokploy is a free, self-hostable Platform as a Service (PaaS). From 0.27.0 to before 0.29.3, a hardcoded…
CVE-2026-22769 — Critical (CVSS 10.0): Dell RecoverPoint for Virtual Machines, versions prior to 6.0.3.1 HF1, contain a hardcoded credential vulnerability.…
CVE-2025-42890 — Critical (CVSS 10.0): SQL Anywhere Monitor (Non-GUI) baked credentials into the code,exposing the resources or functionality to unintended…
CVE-2025-7503 — Critical (CVSS 10.0): An OEM IP camera manufactured by Shenzhen Liandian Communication Technology LTD exposes a Telnet service (port 23) with…
CVE-2025-20309 — Critical (CVSS 10.0): A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session…

Browse all CWE-798 (Use of Hard-coded Credentials) vulnerabilities →