CVE-2026-20262

CVE Enrichment

CVSS: 6.5 MEDIUM
EPSS: 28.17%
EPSS Percentile: 98.08%
CISA KEV: YES — Known Exploited Vulnerability

Description

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 file could later be used to elevate to root. To exploit this vulnerability, the attacker must have valid credentials with at least a lower-privileged, single-task user account.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: psirt@cisco.com
Published: 16-Jun-2026 01:16
Last Modified: 25-Jul-2026 02:10
EPSS Date: 2026-10-12
CWE: CWE-22

CVSS Vector


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

CISA KEV Details

Date Added: 2026-06-15
Remediation Due: 2026-06-29
Known Ransomware Campaign Use: Unknown
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.
Notes: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-arbfw-c2rZvQ ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-20262

Affected Products / Versions

cisco / catalyst_sd-wan_manager
Version / affected range: * · before (exclusive) 20.9.9.2
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*
cisco / catalyst_sd-wan_manager
Version / affected range: * · from (inclusive) 20.10 · before (exclusive) 20.12.7.2
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*
cisco / catalyst_sd-wan_manager
Version / affected range: * · from (inclusive) 20.13 · before (exclusive) 20.15.4.5
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*
cisco / catalyst_sd-wan_manager
Version / affected range: * · from (inclusive) 20.15.5 · before (exclusive) 20.15.5.3
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*
cisco / catalyst_sd-wan_manager
Version / affected range: * · from (inclusive) 20.16 · before (exclusive) 20.18.3.1
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*
cisco / catalyst_sd-wan_manager
Version / affected range: * · from (inclusive) 26.1 · before (exclusive) 26.1.1.2
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*

References

Last enrichment sync: 13-Oct-2026 08:45
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

CVE-2026-20262 Recorded Future Reported 59 High-Impact Vulnerabilities in June, 56 Actively Exploited

CVE (55)

Malware (6)

Threat Actors (6)

Vendors (26)

Products (57)

Tools (2)

Industries (2)

Countries (1)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.