CVE-2020-3482
MEDIUMCisco Expressway and TelePresence VCS < X12.6.3 - Unauthenticated Network Access Control Bypass via TURN Server
Title source: llmDescription
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.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
x_refsource_cisco
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-Expressway-8J3yZ7hV
Scores
CVSS v3
6.5
EPSS
0.0020
EPSS Percentile
41.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-284
CWE-269
Status
published
Products (2)
cisco/expressway
< x12.6.3
cisco/telepresence_video_communication_server
< x12.6.3
Published
Nov 18, 2020
Tracked Since
Feb 18, 2026