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CVE-2026-20262

Cisco Catalyst SD-WAN Manager Arbitrary File Write Vulnerability

  • Medium 6.5
  • Exploited: added to CISA KEV 15 Jun 2026

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.

Key facts

Published
15 Jun 2026
Last changed
17 Jun 2026
Assigned by
cisco
KEV added
15 Jun 2026
KEV fix due
29 Jun 2026
EPSS
29.116% likely to be exploited in the next 30 days, higher than 98.196% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: active; Automatable: no; Technical impact: partial

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 6.5CVSS 3.1, Mediumfrom the CNA (cisco)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

What to do

  • 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.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
CiscoCisco Catalyst SD-WAN Manager
  • Default status: unknown
  • 20.1.12 (affected)
  • 19.2.1 (affected)
  • 18.4.4 (affected)
  • 18.4.5 (affected)
  • 20.1.1.1 (affected)
  • 20.1.1 (affected)
  • 19.3.0 (affected)
  • 19.2.2 (affected)
  • 19.2.099 (affected)
  • 18.3.6 (affected)
  • 18.3.7 (affected)
  • 19.2.0 (affected)
  • 18.3.8 (affected)
  • 19.0.0 (affected)
  • 19.1.0 (affected)
  • 18.4.302 (affected)
  • 18.4.303 (affected)
  • 19.2.097 (affected)
  • 19.2.098 (affected)
  • 17.2.10 (affected)
  • 18.3.6.1 (affected)
  • 19.0.1a (affected)
  • 18.2.0 (affected)
  • 18.4.3 (affected)
  • 18.4.1 (affected)
  • 17.2.8 (affected)
  • 18.3.3.1 (affected)
  • 18.4.0 (affected)
  • 18.3.1 (affected)
  • 17.2.6 (affected)
  • 17.2.9 (affected)
  • 18.3.4 (affected)
  • 17.2.5 (affected)
  • 18.3.1.1 (affected)
  • 18.3.5 (affected)
  • 18.4.0.1 (affected)
  • 18.3.3 (affected)
  • 17.2.7 (affected)
  • 17.2.4 (affected)
  • 18.3.0 (affected)
  • 19.2.3 (affected)
  • 18.4.501_ES (affected)
  • 20.3.1 (affected)
  • 20.1.2 (affected)
  • 19.2.929 (affected)
  • 19.2.31 (affected)
  • 20.3.2 (affected)
  • 19.2.32 (affected)
  • 20.3.2_925 (affected)
  • 20.3.2.1 (affected)
  • 20.3.2.1_927 (affected)
  • 18.4.6 (affected)
  • 20.1.2_937 (affected)
  • 20.4.1 (affected)
  • 20.3.2_928 (affected)
  • 20.3.2_929 (affected)
  • 20.4.1.0.1 (affected)
  • 20.3.2.1_930 (affected)
  • 19.2.4 (affected)
  • 20.5.0.1.1 (affected)
  • 20.4.1.1 (affected)
  • 20.3.3 (affected)
  • 19.2.4.0.1 (affected)
  • 20.3.2_937 (affected)
  • 20.3.3.1 (affected)
  • 20.5.1 (affected)
  • 20.1.3 (affected)
  • 20.3.3.0.4 (affected)
  • 20.3.3.1.2 (affected)
  • 20.3.3.1.1 (affected)
  • 20.4.1.2 (affected)
  • 20.3.3.0.2 (affected)
  • 20.4.1.1.5 (affected)
  • 20.4.1.0.01 (affected)
  • 20.4.1.0.02 (affected)
  • 20.3.3.1.7 (affected)
  • 20.3.3.1.5 (affected)
  • 20.5.1.0.1 (affected)
  • 20.3.3.1.10 (affected)
  • 20.3.3.0.8 (affected)
  • 20.4.2 (affected)
  • 20.4.2.0.1 (affected)
  • 20.3.4 (affected)
  • 20.3.3.0.14 (affected)
  • 19.2.4.0.8 (affected)
  • 19.2.4.0.9 (affected)
  • 20.3.4.0.1 (affected)
  • 20.3.2.0.5 (affected)
  • 20.6.1 (affected)
  • 20.5.1.0.2 (affected)
  • 20.3.3.0.17 (affected)
  • 20.6.1.1 (affected)
  • 20.6.0.18.3 (affected)
  • 20.3.2.0.6 (affected)
  • 20.6.0.18.4 (affected)
  • 20.4.2.0.2 (affected)
  • 20.3.3.0.16 (affected)
  • 20.3.4.0.5 (affected)
  • 20.6.1.0.1 (affected)
  • 20.3.4.0.6 (affected)
  • 20.6.2 (affected)
  • 20.7.1EFT2 (affected)
  • 20.3.4.0.9 (affected)
  • 20.3.4.0.11 (affected)
  • 20.4.2.0.4 (affected)
  • 20.3.3.0.18 (affected)
  • 20.7.1 (affected)
  • 20.6.2.1 (affected)
  • 20.3.4.1 (affected)
  • 20.5.1.1 (affected)
  • 20.4.2.1 (affected)
  • 20.4.2.1.1 (affected)
  • 20.3.4.1.1 (affected)
  • 20.3.813 (affected)
  • 20.3.4.0.19 (affected)
  • 20.4.2.2.1 (affected)
  • 20.5.1.2 (affected)
  • 20.3.4.2 (affected)
  • 20.3.814 (affected)
  • 20.4.2.2 (affected)
  • 20.6.2.2 (affected)
  • 20.3.4.2.1 (affected)
  • 20.7.1.1 (affected)
  • 20.3.4.1.2 (affected)
  • 20.6.2.2.2 (affected)
  • 20.3.4.0.20 (affected)
  • 20.6.2.2.3 (affected)
  • 20.4.2.2.2 (affected)
  • 20.3.5 (affected)
  • 20.6.2.0.4 (affected)
  • 20.4.2.2.3 (affected)
  • 20.3.4.0.24 (affected)
  • 20.6.2.2.7 (affected)
  • 20.6.3 (affected)
  • 20.3.4.2.2 (affected)
  • 20.4.2.2.4 (affected)
  • 20.7.1.0.2 (affected)
  • 20.8.1 (affected)
  • 20.3.5.0.8 (affected)
  • 20.3.5.0.9 (affected)
  • 20.4.2.2.8 (affected)
  • 20.3.5.0.7 (affected)
  • 20.6.3.0.7 (affected)
  • 20.6.3.0.5 (affected)
  • 20.6.3.0.10 (affected)
  • 20.6.3.0.2 (affected)
  • 20.7.2 (affected)
  • 20.9.1EFT2 (affected)
  • 20.6.3.0.11 (affected)
  • 20.6.3.1 (affected)
  • 20.6.3.0.14 (affected)
  • 20.6.4 (affected)
  • 20.9.1 (affected)
  • 20.6.3.0.19 (affected)
  • 20.6.3.0.18 (affected)
  • 20.3.6 (affected)
  • 20.9.1.1 (affected)
  • 20.6.3.0.23 (affected)
  • 20.6.4.0.4 (affected)
  • 20.6.3.0.25 (affected)
  • 20.6.5 (affected)
  • 20.6.3.0.27 (affected)
  • 20.9.2 (affected)
  • 20.9.2.1 (affected)
  • 20.6.3.0.29 (affected)
  • 20.6.3.0.31 (affected)
  • 20.6.3.0.32 (affected)
  • 20.10.1 (affected)
  • 20.6.3.0.33 (affected)
  • 20.9.2.0.01 (affected)
  • 20.9.1_LI_Images (affected)
  • 20.10.1_LI_Images (affected)
  • 20.9.2_LI_Images (affected)
  • 20.3.7 (affected)
  • 20.9.3 (affected)
  • 20.6.5.1 (affected)
  • 20.11.1 (affected)
  • 20.11.1_LI_Images (affected)
  • 20.9.3_LI_ Images (affected)
  • 20.6.3.1.1 (affected)
  • 20.9.3.0.2 (affected)
  • 20.6.5.1.2 (affected)
  • 20.9.3.0.3 (affected)
  • 20.4.2.3 (affected)
  • 20.6.3.2 (affected)
  • 20.6.4.1 (affected)
  • 20.6.3.0.38 (affected)
  • 20.6.3.0.39 (affected)
  • 20.3.5.1 (affected)
  • 20.3.4.3 (affected)
  • 20.9.3.1 (affected)
  • 20.3.3.2 (affected)
  • 20.6.5.2 (affected)
  • 20.3.7.1 (affected)
  • 20.10.1.1 (affected)
  • 20.6.5.2.1 (affected)
  • 20.3.4.0.25 (affected)
  • 20.6.2.2.4 (affected)
  • 20.6.1.2 (affected)
  • 20.11.1.1 (affected)
  • 20.9.3.0.5 (affected)
  • 20.3.4.0.26 (affected)
  • 20.6.5.1.3 (affected)
  • 20.6.3.0.40 (affected)
  • 20.1.3.1 (affected)
  • 20.9.2.2 (affected)
  • 20.6.5.2.3 (affected)
  • 20.6.5.1.4 (affected)
  • 20.6.5.3 (affected)
  • 20.6.3.0.41 (affected)
  • 20.9.3.0.7 (affected)
  • 20.6.5.1.5 (affected)
  • 20.9.3.0.4 (affected)
  • 20.6.4.0.19 (affected)
  • 20.6.5.1.6 (affected)
  • 20.9.3.0.8 (affected)
  • 20.6.3.3 (affected)
  • 20.3.7.2 (affected)
  • 20.6.5.4 (affected)
  • 20.6.5.1.7 (affected)
  • 20.9.3.0.12 (affected)
  • 20.6.4.2 (affected)
  • 20.6.5.5 (affected)
  • 20.9.3.2 (affected)
  • 20.11.1.2 (affected)
  • 20.6.3.4 (affected)
  • 20.10.1.2 (affected)
  • 20.6.5.1.9 (affected)
  • 20.9.3.0.16 (affected)
  • 20.6.3.0.45 (affected)
  • 20.6.5.1.10 (affected)
  • 20.9.3.0.17 (affected)
  • 20.6.5.2.4 (affected)
  • 20.6.4.0.21 (affected)
  • 20.9.3.0.18 (affected)
  • 20.6.3.0.46 (affected)
  • 20.6.3.0.47 (affected)
  • 20.9.2.3 (affected)
  • 20.9.3.2_LI_Images (affected)
  • 20.9.3.0.21 (affected)
  • 20.9.3.0.20 (affected)
  • 20.9.4_LI_Images (affected)
  • 20.9.4 (affected)
  • 20.6.5.1.11 (affected)
  • 20.12.1 (affected)
  • 20.12.1_LI_Images (affected)
  • 20.6.5.1.13 (affected)
  • 20.9.3.0.23 (affected)
  • 20.6.5.2.8 (affected)
  • 20.9.4.1 (affected)
  • 20.9.4.1_LI_Images (affected)
  • 20.9.3.0.25 (affected)
  • 20.9.3.0.24 (affected)
  • 20.6.5.1.14 (affected)
  • 20.3.8 (affected)
  • 20.6.6 (affected)
  • 20.9.3.0.26 (affected)
  • 20.6.3.0.51 (affected)
  • 20.9.3.0.29 (affected)
  • 20.12.2 (affected)
  • 20.12.2_LI_Images (affected)
  • 20.6.6.0.1 (affected)
  • 20.13.1_LI_Images (affected)
  • 20.9.4.0.4 (affected)
  • 20.13.1 (affected)
  • 20.9.4.1.1 (affected)
  • 20.9.5 (affected)
  • 20.9.5_LI_Images (affected)
  • 20.12.3_LI_Images (affected)
  • 20.12.3 (affected)
  • 20.9.4.1.3 (affected)
  • 20.6.7 (affected)
  • 20.9.5.1 (affected)
  • 20.9.5.1_LI_Images (affected)
  • 20.9.4.1.6 (affected)
  • 20.14.1 (affected)
  • 20.14.1_LI_Images (affected)
  • 20.9.5.2 (affected)
  • 20.9.5.2.1 (affected)
  • 20.9.5.2_LI_Images (affected)
  • 20.12.3.1 (affected)
  • 20.12.4 (affected)
  • 20.15.1_LI_Images (affected)
  • 20.15.1 (affected)
  • 20.9.5.1.4 (affected)
  • 20.9.5.2.7 (affected)
  • 20.9.5.2.13 (affected)
  • 20.9.6 (affected)
  • 20.9.6_LI_Images (affected)
  • 20.9.5.2.14 (affected)
  • 20.6.8 (affected)
  • 20.12.4.0.03 (affected)
  • 20.16.1 (affected)
  • 20.16.1_LI_Images (affected)
  • 20.12.4_LI_Images (affected)
  • 20.9.5.2.16 (affected)
  • 20.12.4.0.4 (affected)
  • 20.12.401 (affected)
  • 20.9.5.3 (affected)
  • 20.9.5.3_LI_Images (affected)
  • 20.12.4.1_LI_Images (affected)
  • 20.12.4.1 (affected)
  • 20.9.5.2.21 (affected)
  • 20.9.6.0.3 (affected)
  • 20.12.4.0.6 (affected)
  • 20.15.2_LI_Images (affected)
  • 20.15.2 (affected)
  • 20.12.4_Monthly_ES5 (affected)
  • 20.12.5 (affected)
  • 20.12.5_LI_Images (affected)
  • 20.9.7_LI _Images (affected)
  • 20.9.7 (affected)
  • 20.15.3 (affected)
  • 20.15.3_ LI _Images (affected)
  • 20.12.501 (affected)
  • 20.12.5.1_LI_Images (affected)
  • 20.12.5.1 (affected)
  • 20.12.5.2_LI_Images (affected)
  • 20.12.5.2 (affected)
  • 20.15.3.1 (affected)
  • 20.15.4_LI_Images (affected)
  • 20.15.4 (affected)
  • 20.9.7.1_LI _Images (affected)
  • 20.9.7.1 (affected)
  • 20.18.1 (affected)
  • 20.18.1_LI_Images (affected)
  • 20.12.6_LI_Images (affected)
  • 20.12.6 (affected)
  • 20.12.5.1.01 (affected)
  • 26.0.1 (affected)
  • 20.9.8 (affected)
  • 20.9.8_LI_Images (affected)
  • 20.18.2 (affected)
  • 20.15.4.1_LI_Images (affected)
  • 20.15.4.1 (affected)
  • 20.18.2_LI_Images (affected)
  • 26.1.1 (affected)
  • 26.1.1_LI_Images (affected)
  • 20.18.2.1_LI_Images (affected)
  • 20.18.2.1 (affected)
  • 20.15.4.2_LI_Images (affected)
  • 20.15.4.2 (affected)
  • 20.12.6.1 (affected)
  • 20.12.6.1_LI_Images (affected)
  • 20.12.5.3 (affected)
  • 20.12.5.3_LI_Images (affected)
  • 20.9.8.2_LI_Images (affected)
  • 20.9.8.2 (affected)
  • 20.18.3 (affected)
  • 20.18.3_LI_Images (affected)
  • 20.15.5 (affected)
  • 20.15.5_LI_Images (affected)
  • 20.12.7 (affected)
  • 20.12.7_LI_Images (affected)
  • 20.9.9 (affected)
  • 20.9.9_LI_Images (affected)
  • 20.18.2.2 (affected)
  • 20.18.2.2_LI_Images (affected)
  • 20.12.5.4 (affected)
  • 20.12.5.4_LI_ Images (affected)
  • 20.12.7.1_LI_Images (affected)
  • 20.12.6.2_LI_Images (affected)
  • 20.12.7.1 (affected)
  • 20.15.5.1 (affected)
  • 20.15.4.3 (affected)
  • 20.15.4.3_LI_Images (affected)
  • 20.15.5.1_LI_Images (affected)
  • 20.12.6.2 (affected)
  • 20.15.5.2 (affected)
  • 20.15.5.2_LI_Images (affected)
  • 26.1.1.1_LI_Images (affected)
  • 20.15.4.4 (affected)
  • 20.15.4.4_LI_Images (affected)
  • 26.1.1.1 (affected)
  • 20.9.9.1_LI_Images (affected)
  • 20.9.9.1 (affected)

Timeline

  1. 15 Jun 2026 Added to the CISA KEV catalogue
  2. 15 Jun 2026 Published

Weakness

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References