How severe is CVE-2020-9435?

CVE-2020-9435 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-9435 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9435?

CVE-2020-9435 primarily affects Phoenixcontact Tc Router 3002t-4g Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-9435?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-9435 published?

CVE-2020-9435 was published on 2020-03-12 and last updated on 2026-06-17.

CVE-2020-9435

CVE-2020-9435 is a high-severity vulnerability in Phoenixcontact Tc Router 3002t-4g Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-798.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Phoenixcontact Tc Router 3002t-4g Firmware
Published: 2020-03-12
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2020-9435?: CVE-2020-9435 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-9435 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9435?: CVE-2020-9435 primarily affects Phoenixcontact Tc Router 3002t-4g Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-9435?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-9435 published?: CVE-2020-9435 was published on 2020-03-12 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:o:phoenixcontact:tc_router_3002t-4g_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:phoenixcontact:tc_router_2002t-3g_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:phoenixcontact:tc_router_3002t-4g_vzw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:phoenixcontact:tc_router_3002t-4g_att_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:phoenixcontact:tc_cloud_client_1002-4g_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:phoenixcontact:tc_cloud_client_1002-txtx_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Phoenixcontact Tc Router 3002t-4g Firmware

CVE-2023-3526 — Critical (CVSS 9.6): In PHOENIX CONTACTs TC ROUTER and TC CLOUD CLIENT in versions prior to 2.07.2 as well as CLOUD CLIENT 1101T-TX/TX prior…
CVE-2020-9436 — High (CVSS 8.8): PHOENIX CONTACT TC ROUTER 3002T-4G through 2.05.3, TC ROUTER 2002T-3G through 2.05.3, TC ROUTER 3002T-4G VZW through…
CVE-2023-3569 — Medium (CVSS 4.9): In PHOENIX CONTACTs TC ROUTER and TC CLOUD CLIENT in versions prior to 2.07.2 as well as CLOUD CLIENT 1101T-TX/TX…

All CVEs affecting Phoenixcontact Tc Router 3002t-4g Firmware →

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