CVE-2020-27128

Cisco SD-WAN vManage Software Arbitrary File Creation Vulnerability

MEDIUM
6.5
CVSS Score
Published: November 6, 2020 at 06:15 PM UTC
Updated: June 17, 2026 at 03:08 AM UTC
2 products affected across 1 vendorSd WANCisco SD-WAN vManage

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Severity
MEDIUM6.5
Exploit prediction
EPSS 61%
SSVC
No known exploit

Description

A vulnerability in the application data endpoints of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to write arbitrary files to an affected system. The vulnerability is due to improper validation of requests to APIs. An attacker could exploit this vulnerability by sending malicious requests to an API within the affected application. A successful exploit could allow the attacker to conduct directory traversal attacks and write files to an arbitrary location on the targeted system.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 20.3.1
Affected range stops below 20.3.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMcisco
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-22

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