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CVE-2026-20262

Severity
MEDIUM
CVSS
6.5
EPSS
0.28171
Risk score
60.86
CISA KEV
Yes
PoC
No
Published
2026-06-15
Modified
2026-06-17
First seen
2026-08-05
Aliases
EUVD-2026-36733, GHSA-P45R-GCC9-FR7F
Products
Cisco:Catalyst SD-WAN Manager, Cisco:Cisco Catalyst SD-WAN Manager 17.2.9, Cisco:Cisco Catalyst SD-WAN Manager 18.3.0, Cisco:Cisco Catalyst SD-WAN Manager 19.0.1a, Cisco:Cisco Catalyst SD-WAN Manager 19.2.2, Cisco:Cisco Catalyst SD-WAN Manager 19.2.31, Cisco:Cisco Catalyst SD-WAN Manager 19.2.929, Cisco:Cisco Catalyst SD-WAN Manager 20.1.1.1, Cisco:Cisco Catalyst SD-WAN Manager 20.12.3_LI_Images, Cisco:Cisco Catalyst SD-WAN Manager 20.12.4.0.4, Cisco:Cisco Catalyst SD-WAN Manager 20.12.5, Cisco:Cisco Catalyst SD-WAN Manager 20.12.5.3, Cisco:Cisco Catalyst SD-WAN Manager 20.12.6, Cisco:Cisco Catalyst SD-WAN Manager 20.15.4, Cisco:Cisco Catalyst SD-WAN Manager 20.15.4.1, Cisco:Cisco Catalyst SD-WAN Manager 20.15.4.2, Cisco:Cisco Catalyst SD-WAN Manager 20.15.4.3_LI_Images, Cisco:Cisco Catalyst SD-WAN Manager 20.18.3_LI_Images, Cisco:Cisco Catalyst SD-WAN Manager 20.3.3, Cisco:Cisco Catalyst SD-WAN Manager 20.3.3.0.8, Cisco:Cisco Catalyst SD-WAN Manager 20.3.3.1, Cisco:Cisco Catalyst SD-WAN Manager 20.3.4.0.9, Cisco:Cisco Catalyst SD-WAN Manager 20.3.5.0.9, Cisco:Cisco Catalyst SD-WAN Manager 20.4.2.1, Cisco:Cisco Catalyst SD-WAN Manager 20.4.2.2.2, Cisco:Cisco Catalyst SD-WAN Manager 20.4.2.2.4, Cisco:Cisco Catalyst SD-WAN Manager 20.5.1.2, Cisco:Cisco Catalyst SD-WAN Manager 20.6.0.18.4, Cisco:Cisco Catalyst SD-WAN Manager 20.6.2, Cisco:Cisco Catalyst SD-WAN Manager 20.6.2.2.3, Cisco:Cisco Catalyst SD-WAN Manager 20.6.2.2.4, Cisco:Cisco Catalyst SD-WAN Manager 20.6.2.2.7, Cisco:Cisco Catalyst SD-WAN Manager 20.6.3.0.46, Cisco:Cisco Catalyst SD-WAN Manager 20.6.4.0.21, Cisco:Cisco Catalyst SD-WAN Manager 20.6.5, Cisco:Cisco Catalyst SD-WAN Manager 20.6.5.1, Cisco:Cisco Catalyst SD-WAN Manager 20.6.5.1.14, Cisco:Cisco Catalyst SD-WAN Manager 20.6.5.1.9, Cisco:Cisco Catalyst SD-WAN Manager 20.6.5.2.8, Cisco:Cisco Catalyst SD-WAN Manager 20.6.5.4, Cisco:Cisco Catalyst SD-WAN Manager 20.7.1, Cisco:Cisco Catalyst SD-WAN Manager 20.9.1EFT2, Cisco:Cisco Catalyst SD-WAN Manager 20.9.2.2, Cisco:Cisco Catalyst SD-WAN Manager 20.9.2.3, Cisco:Cisco Catalyst SD-WAN Manager 20.9.3.0.12, Cisco:Cisco Catalyst SD-WAN Manager 20.9.3.0.21, Cisco:Cisco Catalyst SD-WAN Manager 20.9.3.0.8, Cisco:Cisco Catalyst SD-WAN Manager 20.9.4.1.1, Cisco:Cisco Catalyst SD-WAN Manager 20.9.5.2.13, Cisco:Cisco Catalyst SD-WAN Manager 20.9.5.2.16, Cisco:Cisco Catalyst SD-WAN Manager 20.9.8_LI_Images, cisco:catalyst_sd-wan_manager
Sources
nvd CVE-2026-20262
cisa.gov CVE-2026-20262
euvd EUVD-2026-36733

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.

References