Is CVE-2020-3444 being actively exploited?

CVE-2020-3444 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2020-3444?

CVE-2020-3444 has a CVSS 3.1 base score of 7.5 (HIGH).

CVE-2020-3444

HIGH · CVSS 7.5EPSS 1.5%EU EUVD

A vulnerability in the packet filtering features of Cisco SD-WAN Software could allow an unauthenticated, remote attacker to bypass L3 and L4 traffic filters. The vulnerability is due to improper traffic filtering conditions on an affected device. An attacker could exploit this vulnerability by crafting a malicious TCP packet with specific characteristics and sending it to a targeted device. A successful exploit could allow the attacker to bypass the L3 and L4 traffic filters and inject an arbitrary packet into the network.

Key facts

CVSS score: 7.5 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness (CWE): CWE-20
EPSS score: 1.5% (74th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2020-24715)
Published: November 6, 2020
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2020-24715 in the EU Vulnerability Database. Last updated in EUVD on November 13, 2024.

View on the EU Vulnerability Database

Affected products

cisco / ios xe

Certified products that may be affected

18 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Cisco Catalyst 9800 (40/80/L) Wireless Controllers running IOS-XE 16.12 - Cisco Systems, Inc. - FIPS 140 4606 - historical
Cisco Catalyst 9800 (40/80/L) Wireless Controllers running IOS-XE 16.12 - Cisco Systems, Inc. - FIPS 140 3883 - historical
Cisco Catalyst 9800 Wireless Controllers running IOS-XE 16.10 - Cisco Systems, Inc. - FIPS 140 3656 - historical
Cisco ASR 900 Series and NCS4200 Series running IOS-XE 16.9 - Cisco Systems, Inc. - Common Criteria IC3S/MUM01/CISCO/cPP/0119/0016 - archived
Cisco Catalyst 9200L and 9400 Series Switches running IOS-XE 16.9 - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-10972-2019 - archived

See all 18 in the Security Certifications Explorer.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cedge-filt-bypass-Y6wZMqm4(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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