What is CVE-2020-9435?

CVE-2020-9435 is a high-severity vulnerability in Phoenixcontact Tc Cloud Client 1002-4g, classified under Use of Hard-coded Credentials. CVSS score: 7.5/10. Published 2020-03-12.

How severe is CVE-2020-9435?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Phoenixcontact Tc Cloud Client 1002-4g

CVE-2020-9435

PHOENIX CONTACT TC ROUTER 3002T-4G through 2.05.3, TC ROUTER 2002T-3G through 2.05.3, TC ROUTER 3002T-4G VZW through 2.05.3, TC ROUTER 3002T-4G ATT through 2.05.3, TC CLOUD CLIENT 1002-4G through 2.03.17, and TC CLOUD CLIENT 1002-TXTX through 1.03.17 devices contain a hardcoded certificate (and key) that is used by default for web-based services on the device. Impersonation, man-in-the-middle, or passive decryption attacks are possible if the generic certificate is not replaced by a device-specific certificate during installation.

Published 2020-03-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.012 (65.8th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

cert.vde.com/en-us/advisories/ (Third Party Advisory)
cert.vde.com/en-us/advisories/vde-2020-003 (Third Party Advisory)
seclists.org/fulldisclosure/2020/Mar/15 (mailing-list, Exploit, Third Party Advisory)
packetstormsecurity.com/files/156729/Phoenix-Contact-TC-Router-TC-Cloud-Client-… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-9435?: CVE-2020-9435 is a high-severity vulnerability in Phoenixcontact Tc Cloud Client 1002-4g, classified under Use of Hard-coded Credentials. CVSS score: 7.5/10. Published 2020-03-12.
How severe is CVE-2020-9435?: High severity. CVSS v3 base score is 7.5 out of 10.