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CVE-2020-28899

CRITICALCVSS 9.1/10EPSS 1.63%

Last modified

CVE-2020-28899 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. The Web CGI Script on ZyXEL LTE4506-M606 V1.00(ABDO.2)C0 devices does not require authentication, which allows remote unauthenticated attackers (via crafted JSON action data to /cgi-bin/gui.cgi) to use all features provided by the router. Examples: change the router password, retrieve the Wi-Fi passphrase, send an SMS message, or modify the IP forwarding to access the internal network.. EPSS estimates a 1.63% chance of exploitation in the next 30 days.

Description

The Web CGI Script on ZyXEL LTE4506-M606 V1.00(ABDO.2)C0 devices does not require authentication, which allows remote unauthenticated attackers (via crafted JSON action data to /cgi-bin/gui.cgi) to use all features provided by the router. Examples: change the router password, retrieve the Wi-Fi passphrase, send an SMS message, or modify the IP forwarding to access the internal network.

Metrics

CVSS 3.1
9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Probability
1.63%

73.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ZyxelLte4506-M606 Firmware< v1.00\(abdo.6\)c0
ZyxelLte7460-M608 Firmware< v1.00\(abfr.5\)c0
ZyxelWah7706 Firmware< v1.00\(abbc.11\)c0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-28899?
The Web CGI Script on ZyXEL LTE4506-M606 V1.00(ABDO.2)C0 devices does not require authentication, which allows remote unauthenticated attackers (via crafted JSON action data to /cgi-bin/gui.cgi) to use all features provided by the router. Examples: change the router password, retrieve the Wi-Fi passphrase, send an SMS message, or modify the IP forwarding to access the internal network.
How severe is CVE-2020-28899?
CVE-2020-28899 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.63% probability of exploitation in the next 30 days.
How do I fix CVE-2020-28899?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-28899?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST