CVE-2021-1612

Cisco IOS XE SD-WAN Software Arbitrary File Overwrite Vulnerability

HIGH
7.1
CVSS Score
Published: September 23, 2021 at 02:30 AM UTC
Updated: June 17, 2026 at 03:32 AM UTC
2 products affected across 1 vendorSd WANIOS Xe Sd WAN

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Severity
HIGH7.1
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

A vulnerability in the Cisco IOS XE SD-WAN Software CLI could allow an authenticated, local attacker to overwrite arbitrary files on the local system. This vulnerability is due to improper access controls on files within the local file system. An attacker could exploit this vulnerability by placing a symbolic link in a specific location on the local file system. A successful exploit could allow the attacker to overwrite arbitrary files on an affected device.

Affected

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

v < 17.3.4
Affected range stops below 17.3.4, so it looks safe — our inference, not a vendor statement
All versions

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

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-61CWE-59

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