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What Is a Firewall and Do you Need One?

Adam Levin

A firewall is a network security device or program designed to prevent unauthorized and malicious internet traffic from entering a private network or device. Firewalls filter incoming network traffic at a computer’s entry points, or ports, where information is exchanged between the computer network and external devices. Probably not.

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Zyxel 0day Affects its Firewall Products, Too

Krebs on Security

Today, Zyxel acknowledged the same flaw is present in many of its firewall products. “We’ve now completed the investigation of all Zyxel products and found that firewall products running specific firmware versions are also vulnerable,” Zyxel wrote in an email to KrebsOnSecurity. Patch 0 through ZLD V4.35

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Chinese national charged for hacking thousands of Sophos firewalls

Security Affairs

has charged a Chinese national for hacking thousands of Sophos firewall devices worldwide in 2020. has charged the Chinese national Guan Tianfeng (aka gbigmao and gxiaomao) for hacking thousands of Sophos firewall devices worldwide in 2020. The malware stole data and encrypted files to block remediation attempts.

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Pygmy Goat Malware: A Sophisticated Network Device Backdoor Targets Firewalls

Penetration Testing

In a recent report by the National Cyber Security Centre (NCSC), analysts detailed a new malware threat targeting network devices, dubbed “Pygmy Goat.” This backdoor malware, discovered on Sophos XG... The post Pygmy Goat Malware: A Sophisticated Network Device Backdoor Targets Firewalls appeared first on Cybersecurity News.

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Zyxel firewalls targeted in recent ransomware attacks

Security Affairs

Zyxel warns that a ransomware group has been observed exploiting a recently patched command injection issue in its firewalls. Zyxel warns that a ransomware gang has been observed exploiting a recently patched command injection vulnerability, tracked as CVE-2024-42057, in its firewalls for initial compromise.

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Hiding WordPress malware in the mu-plugins directory to avoid detection

Security Affairs

Sucuri researchers spotted threat actors deploying WordPress malware in the mu-plugins directory to evade security checks. The experts detailed two cases of malware hiding in the mu-plugins directory, which use different methods to compromise WordPress sites. “The presence of this malware can be identified by most obvious signs.

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RedTail Crypto-Mining Malware Exploiting Palo Alto Networks Firewall Vulnerability

The Hacker News

The threat actors behind the RedTail cryptocurrency mining malware have added a recently disclosed security flaw impacting Palo Alto Networks firewalls to its exploit arsenal.

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