CVE-2026-20245

Cisco Catalyst SD-WAN Manager: Improper Encoding or Escaping of Output

As of , CVE-2026-20245 in Cisco Catalyst SD-WAN Manager is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch soon.

Exploited
Yes: CISA listed it on 9 June 2026
US federal deadline
23 June 202614 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.25Higher than 97% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
Public exploit
None foundNeither Metasploit nor Exploit-DB lists one.
Fix
Vendor advice: sec.cloudapps.cisco.comLinks below, from CISA's entry.

What CISA says to do

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

CISA's required action

What the flaw is

Cisco Catalyst SD-WAN Manager formerly SD-WAN vManage contains an improper encoding or escaping of output vulnerability. This vulnerability could allow an authenticated, local attacker to execute arbitrary commands as root by supplying a crafted file to the affected system.

CISA's 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.

The CVE record's description, from cisco

CVE published
4 June 2026
Assigned by
cisco
CVSS
7.8 High (CVSS 3.1, from the CNA)
CWE-116
Improper Encoding or Escaping of Output
CISA SSVC, exploitation
active
CISA SSVC, automatable
no
CISA SSVC, technical impact
total

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.

Catalyst SD-WAN Manager: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2026-76504Hex EncodingCisco Catalyst SD-WAN ManagerPatch nowForensic triage required by CISA; listed in the last 14 days0.02
CVE-2026-20262Directory or Path TraversalCisco Catalyst SD-WAN ManagerPatch soon0.28
CVE-2026-20133Exposure of Sensitive Information to an Unauthorized ActorCisco Catalyst SD-WAN ManagerPatch soon0.32
CVE-2026-20128Storing Passwords in a Recoverable FormatCisco Catalyst SD-WAN ManagerPatch soon0.07

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