CVE-2026-20245
HighExploitedPublic exploitA vulnerability in the CLI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, local attacker to execute arbitrary commands as root by supplying a crafted file to the affected system.
Published Jun 4, 2026 · Updated Jul 23, 2026 · Also known as EUVD-2026-34341, GHSA-h4c6-cm2m-h5f6, TR-26-0317
Key Facts
Patch immediately- CVE-2026-20245 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting Catalyst SD-WAN Manager (Cisco), SD-WAN Vsmart Controller (Cisco), Cisco Catalyst SD-WAN Controller.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jun 5, 2026. Public exploit code is available.
- EPSS estimates a 25% probability of exploitation in the next 30 days.
- Fixed versions are available, including Catalyst SD-WAN Manager 20.12.5.4, Catalyst SD-WAN Manager 20.12.6.2, Catalyst SD-WAN Manager 20.15.4.4.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
25%
Higher than 97.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2026-20245 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
A vulnerability in the CLI of Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, could allow an authenticated, local attacker to execute arbitrary commands as root by supplying a crafted file to the affected system.
This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by uploading a crafted file to the affected system. A successful exploit could allow the attacker to perform command injection attacks on an affected system and elevate their privileges as the root user. To exploit this vulnerability, the attacker must have netadmin privileges on the affected system. This would require valid credentials or exploitation of or . Cisco is not aware of successful exploitation by other methods. Cisco has observed limited cases where the exploitation of this bug resulted in a configuration change pushed to edge devices. Cisco recommends that customers upgrade to the fixed software that is documented in the that was published on May 14, 2026, and verify the configuration of the edge devices.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Jun 9, 2026 | Jun 23, 2026 | Not reported |
| Industry KEV feed | Jun 5, 2026 | Jun 23, 2026 | Not reported |
| CIRCL KEV | Jun 5, 2026 | Jun 23, 2026 | Not reported |
| ENISA EUVD | Jun 9, 2026 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected Products
8 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Catalyst SD-WAN ManagerCisco | 20.12.7, >= 20.1.12 | 20.9.9.1 |
| SD-WAN Vsmart ControllerCisco | 20.12.7 | 20.9.9.1 |
| Cisco Catalyst SD-WAN Controller | >= 20.6.4 | n/a |
Patched Releases
Catalyst SD-WAN Manager
20.12.5.4, 20.12.6.2, 20.15.4.4, 20.15.5.2, 20.18.2.2, 20.9.9.1, 26.1.1.1
SD-WAN Vsmart Controller
20.12.5.4, 20.12.6.2, 20.15.4.4, 20.15.5.2, 20.18.2.2, 20.9.9.1, 26.1.1.1
Timeline
Publicly disclosed
Jun 4, 2026
Added to Industry KEV feed
Jun 5, 2026
Added to CIRCL KEV
Jun 5, 2026
Added to CISA KEV
Jun 9, 2026
Added to ENISA EUVD
Jun 9, 2026
Last updated
Jul 23, 2026
Weakness Type
- CWE-116 Improper Encoding or Escaping of Output
References
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2026-20245
- advisoryUSOM advisory
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
A vulnerability in the CLI of Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, could allow an authenticated, local attacker to execute arbitrary commands as root by supplying a crafted file to t…
Affected: Catalyst SD-WAN Manager (Cisco) versions 20.12.7, >= 20.1.12; SD-WAN Vsmart Controller (Cisco) versions 20.12.7; Cisco Catalyst SD-WAN Controller versions >= 20.6.4. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jun 5, 2026.
Yes. It was added on Jun 9, 2026 with a federal remediation due date of Jun 23, 2026.
Public exploit code is available.
Fixed versions are available, including Catalyst SD-WAN Manager 20.12.5.4, Catalyst SD-WAN Manager 20.12.6.2, Catalyst SD-WAN Manager 20.15.4.4.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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