How severe is CVE-2020-20183?

CVE-2020-20183 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-2020-20183 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-20183?

CVE-2020-20183 affects Zyxel P1302-t10 V3 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-20183?

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-2020-20183 published?

CVE-2020-20183 was published on 2020-12-14 and last updated on 2026-06-17.

CVE-2020-20183

CVE-2020-20183 is a high-severity vulnerability in Zyxel P1302-t10 V3 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-639.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-639
Affected product: Zyxel P1302-t10 V3 Firmware
Published: 2020-12-14
Last modified: 2026-06-17

Description

Insecure direct object reference vulnerability in Zyxel’s P1302-T10 v3 with firmware version 2.00(ABBX.3) and earlier allows attackers to gain privileges and access certain admin pages.

Frequently asked questions

What is CVE-2020-20183?: Insecure direct object reference vulnerability in Zyxel’s P1302-T10 v3 with firmware version 2.00(ABBX.3) and earlier allows attackers to gain privileges and access certain admin pages.
How severe is CVE-2020-20183?: CVE-2020-20183 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-2020-20183 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-20183?: CVE-2020-20183 affects Zyxel P1302-t10 V3 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-20183?: 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-2020-20183 published?: CVE-2020-20183 was published on 2020-12-14 and last updated on 2026-06-17.

References

https://www.zyxel.com/us/en/support/P1302-T10D-v3-modem-insecure-direct-object-reference-vulnerability.shtml

Affected products (1)

cpe:2.3:o:zyxel:p1302-t10_v3_firmware:2.00:*:*:*:*:*:*:*

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