CVE-2020-3602

Cisco StarOS Privilege Escalation Vulnerability

MEDIUM
6.7
CVSS Score
Published: October 8, 2020 at 04:21 AM UTC
Updated: June 17, 2026 at 03:18 AM UTC
3 products affected across 1 vendorStarosAsr 5500Asr 5700

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Severity
MEDIUM6.7
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

A vulnerability in the CLI of Cisco StarOS operating system for Cisco ASR 5000 Series Routers could allow an authenticated, local attacker to elevate privileges on an affected device. The vulnerability is due to insufficient input validation of CLI commands. An attacker could exploit this vulnerability by sending crafted commands to the CLI. A successful exploit could allow the attacker to execute arbitrary code with the privileges of the root user on the affected device. To exploit this vulnerability, an attacker would need to have valid credentials on an affected device and know the password for the cli test-commands command.

Affected

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

v < 21.19.n4
Affected range stops below 21.19.n4, so it looks safe — our inference, not a vendor statement
cisco-asr-5500 (environment) · cisco-asr-5700 (environment)
All versions
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
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20CWE-78

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