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CVE-2026-20245

Cisco Catalyst SD-WAN Controller Authenticated Privilege Escalation Vulnerability

High7.8Known exploitedPublic exploitEPSS 25.3%
Published
Updated
Reserved
Assigned by
cisco

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.

Exploited in the wild

CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Cisco Catalyst SD-WAN Manager Improper Encoding or Escaping of Output Vulnerability.

Added
9 Jun 2026
Fix due (US federal)
23 Jun 2026
Used by ransomware
Not known

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Public exploit

An exploit or proof of concept is public: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: it is being exploited.

Timeline

  1. ID reserved

    By cisco

  2. · 8 months later

    Published

  3. · 5 days later

    Added to CISA KEV

    Known exploited in the wild

  4. · 42 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-20245, by who scored it
Scored byCVSSScoreVector
ciscoCNA (assigner)3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Analyzed3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
25.3% · top 2.0% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: active · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Weakness

Affected products

  • Cisco · Cisco Catalyst SD-WAN Controller

    • affected 20.6.4
    • affected 20.9.2
    • affected 20.3.6
    • affected 20.7.2
    • affected 20.7.1
    • affected 20.5.1
    • affected 20.6.2
    • affected 19.3.0
    • affected 20.6.1
    • affected 17.2.4
    • affected 18.2.0
    • affected 18.4.6
    • affected 19.1.0
    • affected 19.2.4
    • affected 19.2.929
    • affected 18.3.8
    • affected 18.4.303
    • affected 18.3.7
    • affected 18.4.1
    • affected 19.2.097
    • affected 19.2.0
    • affected 19.2.099
    • affected 18.3.6
    • affected 20.4.2
    • affected 19.0.0
    • affected 20.9.1
    • affected 20.3.5
    • affected 20.3.1
    • affected 18.3.5
    • affected 20.6.3
    • affected 18.4.3
    • affected 18.4.4
    • affected 18.3.3
    • affected 17.2.8
    • affected 20.8.1
    • affected 19.2.32
    • affected 19.2.2
    • affected 17.2.5
    • affected 18.4.0
    • affected 20.4.1.1
    • and 101 more

  • Cisco · Cisco Catalyst SD-WAN Manager

    • affected 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
    • and 336 more

What to do

Exploitation: In June 2026, the Cisco PSIRT became aware of exploitation of this vulnerability. To exploit this vulnerability, an attacker must have netadmin privileges on an affected system. This would require valid credentials or exploitation of or . Cisco is not aware of successful exploitation by other methods.

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

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Record last updated .