Is CVE-2026-20133 in the CISA KEV catalog?

Yes. CVE-2026-20133 is on the CISA Known Exploited Vulnerabilities list, added 2026-04-20.

What is the CVSS severity of CVE-2026-20133?

CVE-2026-20133 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2026-20133?

CVE-2026-20133 has an EPSS score of 10.24% (95th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-20133?

Upgrade catalyst sd-wan manager to 20.18.2.1 or later.

CVE & CISA-KEV Catalog

CVE-2026-20133

MEDIUMCISA KEVEPSS 95th pctl

6.5

CVSS v3

NVD

Description

A vulnerability in Cisco Catalyst SD-WAN Software could allow an unauthenticated, remote attacker to view sensitive information on an affected system. This vulnerability is due to insufficient file system restrictions. An authenticated attacker with netadmin privileges could exploit this vulnerability by accessing the vshell of an affected system. A successful exploit could allow the attacker to read sensitive information on the underlying operating system.

CWE-200Information Exposure

How to fix

Remediation Available

catalyst sd-wan managerNVD

Affected:>= 20.16, < 20.18.2.1Fixed in:20.18.2.1CVE-2026-20133derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

10.24%probability of exploitation in 30 days

95thpercentile

Very high risk: more likely to be exploited than 95% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Remediation due: 2026-04-23

References

Vendor Advisory1

sec.cloudapps.cisco.com

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-200 (Information Exposure) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-24919	High	8.6	100%	KEV + Ransom	-
CVE-2020-14181	Medium	5.3	100%	-	Fix
CVE-2021-34429	Medium	5.3	99%	-	Fix
CVE-2018-11409	Medium	5.3	98%	-	-
CVE-2021-41277	Critical	10.0	97%	KEV	-
CVE-2016-2183	High	7.5	96%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-22.