How severe is CVE-2026-20133?

CVE-2026-20133 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-20133 being actively exploited?

Yes. CVE-2026-20133 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-04-20, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2026-20133?

CVE-2026-20133 primarily affects Cisco Catalyst Sd-wan Manager. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-20133?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2026-20133 have an EU (EUVD) identifier?

Yes. CVE-2026-20133 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8678. It is also flagged as exploited in the EUVD (since 2026-04-20).

When was CVE-2026-20133 published?

CVE-2026-20133 was published on 2026-02-25 and last updated on 2026-06-17.

CVE-2026-20133

CVE-2026-20133 is a medium-severity vulnerability in Cisco Catalyst Sd-wan Manager with a CVSS 3.x base score of 6.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2026-04-20). The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 10% (95th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2026-04-20)
EU (EUVD) id: EUVD-2026-8678
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2026-04-20)
Weakness: CWE-200
Affected product: Cisco Catalyst Sd-wan Manager
Published: 2026-02-25
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-20133?: 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.
How severe is CVE-2026-20133?: CVE-2026-20133 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-20133 being actively exploited?: Yes. CVE-2026-20133 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-04-20, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2026-20133?: CVE-2026-20133 primarily affects Cisco Catalyst Sd-wan Manager. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-20133?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2026-20133 have an EU (EUVD) identifier?: Yes. CVE-2026-20133 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8678. It is also flagged as exploited in the EUVD (since 2026-04-20).
When was CVE-2026-20133 published?: CVE-2026-20133 was published on 2026-02-25 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.12.6:*:*:*:*:*:*:*

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