CISA KEV · Known exploitedMedium

CVE-2026-20262

Cisco Cisco Catalyst SD-WAN Manager, catalyst sd-wan manager

A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker to create a file or overwrite any file on the filesystem of an affected system. This vulnerability exists because the affected software does not properly validate user-supplied input during a file upload process. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected API endpoint of the affected system. A successful exploit could allow the attacker to create or overwrite any file on the underlying operating system. This...

CVSS: 6.5
EPSS: 28.2%
CISA KEV: Listed
Published: 2026.06.16

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability28.2%

Technical severityCVSS 6.5

Vulnerability overview

Affected product and versions

Product: Cisco Cisco Catalyst SD-WAN Manager, catalyst sd-wan manager
Affected versions: >= 20.1.12, >= 19.2.1, >= 18.4.4, >= 18.4.5, >= 20.1.1.1, >= 20.1.1, >= 19.3.0, >= 19.2.2, >= 19.2.099, >= 18.3.6, >= 18.3.7, >= 19.2.0, >= 18.3.8, >= 19.0.0, >= 19.1.0, >= 18.4.302, >= 18.4.303, >= 19.2.097, >= 19.2.098, >= 17.2.10
Fixed versions: 20.9.9.2, 20.12.7.2, 20.15.4.5, 20.15.5.3, 20.18.3.1, 26.1.1.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Due date: 2026.06.29

1
Identify
Confirm that Cisco Cisco Catalyst SD-WAN Manager, catalyst sd-wan manager and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CWE: CWE-22
KEV added: 2026.06.15
Ransomware use: 미확인