CVE-2020-3482

Cisco Expressway Software Unauthorized Access Information Disclosure Vulnerability

MEDIUM
6.5
CVSS Score
Published: November 18, 2020 at 05:41 PM UTC
Updated: June 17, 2026 at 03:18 AM UTC
2 products affected across 1 vendorTelepresence Video Communication ServerExpressway

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Severity
MEDIUM6.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

A vulnerability in the Traversal Using Relays around NAT (TURN) server component of Cisco Expressway software could allow an unauthenticated, remote attacker to bypass security controls and send network traffic to restricted destinations. The vulnerability is due to improper validation of specific connection information by the TURN server within the affected software. An attacker could exploit this issue by sending specially crafted network traffic to the affected software. A successful exploit could allow the attacker to send traffic through the affected software to destinations beyond the application, possibly allowing the attacker to gain unauthorized network access.

Affected

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

v < x12.6.3
Affected range stops below x12.6.3, so it looks safe — our inference, not a vendor statement
v < x12.6.3
Affected range stops below x12.6.3, 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 exploitAutomatablePartial impact

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

CVSS

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

Quick Info

StatusMODIFIED
CWE
CWE-284CWE-269

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