How severe is CVE-2018-10252?

CVE-2018-10252 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-10252 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-10252?

CVE-2018-10252 affects Actiontec Wcb6200q Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-10252?

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-2018-10252 published?

CVE-2018-10252 was published on 2018-05-14 and last updated on 2026-06-17.

CVE-2018-10252

CVE-2018-10252 is a high-severity vulnerability in Actiontec Wcb6200q Firmware with a CVSS 3.x base score of 8.1. 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-384.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 6.8
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-384
Affected product: Actiontec Wcb6200q Firmware
Published: 2018-05-14
Last modified: 2026-06-17

Description

An issue was discovered on Actiontec WCB6200Q before 1.1.10.20a devices. The admin login session cookie is insecurely generated making admin session hijacking possible. When an admin logs in, a session cookie is generated using the time of day rounded to 10ms. Since the web server returns its current time of day in responses, it is possible to step backward through possible session values until a working one is found. Once a working session ID is found, an attacker then has admin control of the device and can add a secondary SSID to create a backdoor to the network.

Frequently asked questions

What is CVE-2018-10252?: An issue was discovered on Actiontec WCB6200Q before 1.1.10.20a devices. The admin login session cookie is insecurely generated making admin session hijacking possible. When an admin logs in, a session cookie is generated using the time of day rounded to 10ms. Since the web server returns its current time of day in responses, it is possible to step backward through possible session values until a working one is found. Once a working session ID is found, an attacker then has admin control of the device and can add a secondary SSID to create a backdoor to the network.
How severe is CVE-2018-10252?: CVE-2018-10252 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-10252 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-10252?: CVE-2018-10252 affects Actiontec Wcb6200q Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-10252?: 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-2018-10252 published?: CVE-2018-10252 was published on 2018-05-14 and last updated on 2026-06-17.

References

https://actiontecsupport.zendesk.com/hc/en-us/articles/115000432163-WCB6200Q-Firmware-Upgrade

Affected products (1)

cpe:2.3:o:actiontec:wcb6200q_firmware:*:*:*:*:*:*:*:*

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