Detections
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Cisco Catalyst SD-WAN Manager Arbitrary File Write (cisco-sa-sdwan-arbfw-c2rZvQ)

medium Nessus Plugin ID 321174

Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco SD-WAN Viptela Software is affected by a 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. (CVE-2026-20262)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwu18441

See Also

http://www.nessus.org/u?a6713046

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwu18441

Plugin Details

Severity: Medium

ID: 321174

File Name: cisco-sa-sdwan-arbfw-c2rZvQ.nasl

Version: 1.1

Type: Local

Family: CISCO

Published: 6/16/2026

Updated: 6/16/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.1

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.6

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:C/A:N

CVSS Score Source: CVE-2026-20262

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 6

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:sd-wan_firmware

Required KB Items: Cisco/Viptela/Version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/15/2026

Vulnerability Publication Date: 6/15/2026

CISA Known Exploited Vulnerability Due Dates: 6/29/2026

Reference Information

CVE: CVE-2026-20262

CWE: 22

CISCO-SA: cisco-sa-sdwan-arbfw-c2rZvQ

CISCO-BUG-ID: CSCwu18441