CVEs / CVE-2026-20262
CVE-2026-20262: Cisco Catalyst SD-WAN Manager Directory or Path Traversal Vulnerability
- Known exploited in the CISA KEV catalog since 15 Jun 2026
- medium 6.5 CVSS 3.1 (from the CNA)
- EPSS 29.1% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Cisco Catalyst SD-WAN Manager contains a directory or path traversal vulnerability that could allow an authenticated, remote attacker to create a file or overwrite any file on the filesystem of an affected system.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Cisco Cisco Catalyst SD-WAN Manager | 20.1.12 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 19.2.1 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 18.4.4 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 18.4.5 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 20.1.1.1 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 20.1.1 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 19.3.0 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 19.2.2 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 19.2.099 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 18.3.6 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 18.3.7 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 19.2.0 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 18.3.8 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 19.0.0 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 19.1.0 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 18.4.302 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 18.4.303 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 19.2.097 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 19.2.098 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 17.2.10 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 18.3.6.1 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 19.0.1a | — |
| Cisco Cisco Catalyst SD-WAN Manager | 18.2.0 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 18.4.3 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 18.4.1 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 17.2.8 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 18.3.3.1 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 18.4.0 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 18.3.1 | — |
| Cisco Cisco Catalyst SD-WAN Manager | 17.2.6 | — |
Exploitation
| In CISA KEV since | 15 Jun 2026 |
|---|---|
| Due date for US federal agencies | 29 Jun 2026 |
| Used in ransomware campaigns | 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. |
Severity
| CVSS 3.1 | 6.5 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:NScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-22 |
References
- CVE-2026-20262 on NVD
- CVE-2026-20262 in the CISA KEV catalog
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-arbfw-c2rZvQ (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk (cited by CISA)
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-arbfw-c2rZvQ Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20262 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.