How severe is CVE-2018-20512?

CVE-2018-20512 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-20512 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20512?

CVE-2018-20512 affects Cdatatec Epon Cpe-wifi Devices Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20512?

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

When was CVE-2018-20512 published?

CVE-2018-20512 was published on 2019-01-03 and last updated on 2026-06-17.

CVE-2018-20512

CVE-2018-20512 is a critical-severity vulnerability in Cdatatec Epon Cpe-wifi Devices Firmware with a CVSS 3.x base score of 9.8. 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-565.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-565
Affected product: Cdatatec Epon Cpe-wifi Devices Firmware
Published: 2019-01-03
Last modified: 2026-06-17

Description

EPON CPE-WiFi devices 2.0.4-X000 are vulnerable to escalation of privileges by sending cooLogin=1, cooUser=admin, and timestamp=-1 cookies.

Frequently asked questions

What is CVE-2018-20512?: EPON CPE-WiFi devices 2.0.4-X000 are vulnerable to escalation of privileges by sending cooLogin=1, cooUser=admin, and timestamp=-1 cookies.
How severe is CVE-2018-20512?: CVE-2018-20512 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-20512 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20512?: CVE-2018-20512 affects Cdatatec Epon Cpe-wifi Devices Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20512?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-20512 published?: CVE-2018-20512 was published on 2019-01-03 and last updated on 2026-06-17.

References

https://www.reddit.com/r/networking/comments/abu4kq/vulnerability_in_cdata_technologies_epon_cpewifi/

Affected products (1)

cpe:2.3:o:cdatatec:epon_cpe-wifi_devices_firmware:2.0.4-x000:*:*:*:*:*:*:*

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