CVE-2020-3482

mediumpriority · track · 26EPSS 0.014 · 72 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.38% (72nd) EPSS

CVSS 6.4 · medium

Is it mine?

5 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.06.4mediumAV:N/AC:L/Au:N/C:P/I:P/A:Nprimary · NVD / NIST USexploitability 10 · impact 4.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 2.5

v3.06.5mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Nsecondary · ENISA EU

v3.06.5mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Nsecondary · psirt@cisco.com USexploitability 3.9 · impact 2.5

v3.16.5mediumAV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-269USprimaryCWE-284USCWE-284US

affected products (5)

Products and version ranges known to be affected.

Cisco Cisco TelePresence Video Communication Server (VCS) Expressway≤ n/aenisa_euvdEU
Cisco Systems Inc. Cisco Expressway≤ X12.6.3fstec_bduRU
Cisco Systems Inc. TelePresence Video Communication Server≤ X12.6.3fstec_bduRU
cisco expressway< x12.6.3nvdUScpe:2.3:a:cisco:expressway:*:*:*:*:*:*:*:*
cisco telepresence video communication server< x12.6.3nvdUScpe:2.3:a:cisco:telepresence_video_communication_server:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2020-11-18modified 2026-06-17

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+6651 more

references (5)

External citations — patches, advisories, analysis.

scry

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