CVE-2026-20262Cisco Catalyst SD-WAN Manager Arbitrary File Write Vulnerability
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.
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 6.5 | MEDIUM | 3.1cisco (CNA) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
CISA required action
⚡ Known exploited · remediation due Jun 29, 2026
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.
Details
- CVE ID
- CVE-2026-20262
- Status
- Analyzed
- Assigner (CNA)
- cisco
- Published
- Jun 15, 2026
- Last modified
- 2026-07-24 19:10 UTC
- Weaknesses
- CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products
As published by the CNA in the CVE record.
CiscoCisco Catalyst SD-WAN Manager376 version ranges
- 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
- 18.3.6.1
- 19.0.1a
- 18.2.0
- 18.4.3
- 18.4.1
- 17.2.8
- 18.3.3.1
- 18.4.0
- 18.3.1
- 17.2.6
- 17.2.9
- 18.3.4
- 17.2.5
- 18.3.1.1
- 18.3.5
- 18.4.0.1
- 18.3.3
- 17.2.7
- 17.2.4
- 18.3.0
- 19.2.3
- 18.4.501_ES
- 20.3.1
- 20.1.2
- 19.2.929
- 19.2.31
- 20.3.2
- 19.2.32
- 20.3.2_925
- 20.3.2.1
- 20.3.2.1_927
- 18.4.6
- 20.1.2_937
- 20.4.1
- 20.3.2_928
- 20.3.2_929
- 20.4.1.0.1
- 20.3.2.1_930
- 19.2.4
- 20.5.0.1.1
- 20.4.1.1
- 20.3.3
- 19.2.4.0.1
- 20.3.2_937
- 20.3.3.1
- 20.5.1
- 20.1.3
- 20.3.3.0.4
- 20.3.3.1.2
- 20.3.3.1.1
- 20.4.1.2
- 20.3.3.0.2
- 20.4.1.1.5
- 20.4.1.0.01
- 20.4.1.0.02
- 20.3.3.1.7
- 20.3.3.1.5
- 20.5.1.0.1
- 20.3.3.1.10
- 20.3.3.0.8
- 20.4.2
- 20.4.2.0.1
- 20.3.4
- 20.3.3.0.14
- 19.2.4.0.8
- 19.2.4.0.9
- 20.3.4.0.1
- 20.3.2.0.5
- 20.6.1
- 20.5.1.0.2
- 20.3.3.0.17
- 20.6.1.1
- 20.6.0.18.3
- 20.3.2.0.6
- 20.6.0.18.4
- 20.4.2.0.2
- 20.3.3.0.16
- 20.3.4.0.5
- 20.6.1.0.1
- 20.3.4.0.6
- 20.6.2
- 20.7.1EFT2
- 20.3.4.0.9
- 20.3.4.0.11
- 20.4.2.0.4
- 20.3.3.0.18
- 20.7.1
- 20.6.2.1
- 20.3.4.1
- 20.5.1.1
- 20.4.2.1
- 20.4.2.1.1
- 20.3.4.1.1
- 20.3.813
- 20.3.4.0.19
- 20.4.2.2.1
- 20.5.1.2
- 20.3.4.2
- 20.3.814
- 20.4.2.2
- 20.6.2.2
- 20.3.4.2.1
- 20.7.1.1
- 20.3.4.1.2
- 20.6.2.2.2
- 20.3.4.0.20
- 20.6.2.2.3
- 20.4.2.2.2
- 20.3.5
- 20.6.2.0.4
- 20.4.2.2.3
- 20.3.4.0.24
- 20.6.2.2.7
- 20.6.3
- 20.3.4.2.2
- 20.4.2.2.4
- 20.7.1.0.2
- 20.8.1
- 20.3.5.0.8
- 20.3.5.0.9
- 20.4.2.2.8
- 20.3.5.0.7
- 20.6.3.0.7
- 20.6.3.0.5
- 20.6.3.0.10
- 20.6.3.0.2
- 20.7.2
- 20.9.1EFT2
- 20.6.3.0.11
- 20.6.3.1
- 20.6.3.0.14
- 20.6.4
- 20.9.1
- 20.6.3.0.19
- 20.6.3.0.18
- 20.3.6
- 20.9.1.1
- 20.6.3.0.23
- 20.6.4.0.4
- 20.6.3.0.25
- 20.6.5
- 20.6.3.0.27
- 20.9.2
- 20.9.2.1
- 20.6.3.0.29
- 20.6.3.0.31
- 20.6.3.0.32
- 20.10.1
- 20.6.3.0.33
- 20.9.2.0.01
- 20.9.1_LI_Images
- 20.10.1_LI_Images
- 20.9.2_LI_Images
- 20.3.7
- 20.9.3
- 20.6.5.1
- 20.11.1
- 20.11.1_LI_Images
- 20.9.3_LI_ Images
- 20.6.3.1.1
- 20.9.3.0.2
- 20.6.5.1.2
- 20.9.3.0.3
- 20.4.2.3
- 20.6.3.2
- 20.6.4.1
- 20.6.3.0.38
- 20.6.3.0.39
- 20.3.5.1
- 20.3.4.3
- 20.9.3.1
- 20.3.3.2
- 20.6.5.2
- 20.3.7.1
- 20.10.1.1
- 20.6.5.2.1
- 20.3.4.0.25
- 20.6.2.2.4
- 20.6.1.2
- 20.11.1.1
- 20.9.3.0.5
- 20.3.4.0.26
- 20.6.5.1.3
- 20.6.3.0.40
- 20.1.3.1
- 20.9.2.2
- 20.6.5.2.3
- 20.6.5.1.4
- 20.6.5.3
- 20.6.3.0.41
- 20.9.3.0.7
- 20.6.5.1.5
- 20.9.3.0.4
- 20.6.4.0.19
- 20.6.5.1.6
- 20.9.3.0.8
- 20.6.3.3
- 20.3.7.2
- 20.6.5.4
- 20.6.5.1.7
- 20.9.3.0.12
- 20.6.4.2
- 20.6.5.5
- 20.9.3.2
- 20.11.1.2
- 20.6.3.4
- 20.10.1.2
- 20.6.5.1.9
- 20.9.3.0.16
- 20.6.3.0.45
- 20.6.5.1.10
- 20.9.3.0.17
- 20.6.5.2.4
- 20.6.4.0.21
- 20.9.3.0.18
- 20.6.3.0.46
- 20.6.3.0.47
- 20.9.2.3
- 20.9.3.2_LI_Images
- 20.9.3.0.21
- 20.9.3.0.20
- 20.9.4_LI_Images
- 20.9.4
- 20.6.5.1.11
- 20.12.1
- 20.12.1_LI_Images
- 20.6.5.1.13
- 20.9.3.0.23
- 20.6.5.2.8
- 20.9.4.1
- 20.9.4.1_LI_Images
- 20.9.3.0.25
- 20.9.3.0.24
- 20.6.5.1.14
- 20.3.8
- 20.6.6
- 20.9.3.0.26
- 20.6.3.0.51
- 20.9.3.0.29
- 20.12.2
- 20.12.2_LI_Images
- 20.6.6.0.1
- 20.13.1_LI_Images
- 20.9.4.0.4
- 20.13.1
- 20.9.4.1.1
- 20.9.5
- 20.9.5_LI_Images
- 20.12.3_LI_Images
- 20.12.3
- 20.9.4.1.3
- 20.6.7
- 20.9.5.1
- 20.9.5.1_LI_Images
- 20.9.4.1.6
- 20.14.1
- 20.14.1_LI_Images
- 20.9.5.2
- 20.9.5.2.1
- 20.9.5.2_LI_Images
- 20.12.3.1
- 20.12.4
- 20.15.1_LI_Images
- 20.15.1
- 20.9.5.1.4
- 20.9.5.2.7
- 20.9.5.2.13
- 20.9.6
- 20.9.6_LI_Images
- 20.9.5.2.14
- 20.6.8
- 20.12.4.0.03
- 20.16.1
- 20.16.1_LI_Images
- 20.12.4_LI_Images
- 20.9.5.2.16
- 20.12.4.0.4
- 20.12.401
- 20.9.5.3
- 20.9.5.3_LI_Images
- 20.12.4.1_LI_Images
- 20.12.4.1
- 20.9.5.2.21
- 20.9.6.0.3
- 20.12.4.0.6
- 20.15.2_LI_Images
- 20.15.2
- 20.12.4_Monthly_ES5
- 20.12.5
- 20.12.5_LI_Images
- 20.9.7_LI _Images
- 20.9.7
- 20.15.3
- 20.15.3_ LI _Images
- 20.12.501
- 20.12.5.1_LI_Images
- 20.12.5.1
- 20.12.5.2_LI_Images
- 20.12.5.2
- 20.15.3.1
- 20.15.4_LI_Images
- 20.15.4
- 20.9.7.1_LI _Images
- 20.9.7.1
- 20.18.1
- 20.18.1_LI_Images
- 20.12.6_LI_Images
- 20.12.6
- 20.12.5.1.01
- 26.0.1
- 20.9.8
- 20.9.8_LI_Images
- 20.18.2
- 20.15.4.1_LI_Images
- 20.15.4.1
- 20.18.2_LI_Images
- 26.1.1
- 26.1.1_LI_Images
- 20.18.2.1_LI_Images
- 20.18.2.1
- 20.15.4.2_LI_Images
- 20.15.4.2
- 20.12.6.1
- 20.12.6.1_LI_Images
- 20.12.5.3
- 20.12.5.3_LI_Images
- 20.9.8.2_LI_Images
- 20.9.8.2
- 20.18.3
- 20.18.3_LI_Images
- 20.15.5
- 20.15.5_LI_Images
- 20.12.7
- 20.12.7_LI_Images
- 20.9.9
- 20.9.9_LI_Images
- 20.18.2.2
- 20.18.2.2_LI_Images
- 20.12.5.4
- 20.12.5.4_LI_ Images
- 20.12.7.1_LI_Images
- 20.12.6.2_LI_Images
- 20.12.7.1
- 20.15.5.1
- 20.15.4.3
- 20.15.4.3_LI_Images
- 20.15.5.1_LI_Images
- 20.12.6.2
- 20.15.5.2
- 20.15.5.2_LI_Images
- 26.1.1.1_LI_Images
- 20.15.4.4
- 20.15.4.4_LI_Images
- 26.1.1.1
- 20.9.9.1_LI_Images
- 20.9.9.1