Attackers are exploiting vulnerability CVE-2026-106931 in SiteGuard Server Edition to run commands as root or SYSTEM. EG Secure Solutions published an urgent alert warning of CVE-2026-106931, an OS command injection bug in SiteGuard Server Edition. Threat actors are already exploiting it in the wild. A successful exploit lets them run commands with root or SYSTEM privileges on the server where the product runs. SiteGuard is a Japanese web application firewall (WAF) that runs directly on the web server it protects. The vulnerability affects its statistics feature, which is enabled by default. The vendor and JVN rated the vulnerability with a CVSS 4.0 score of 8.5 and a CVSS 3.0 score of 7.8. An attacker needs local access and low-level privileges to exploit this vulnerability. This suggests the flaw may be used after an attacker has already gained access to a system. The vulnerability impacts version 2.20 or later. On Apache, Nginx and IIS that means anything before 8.00 Update 5, except FreeBSD, and on FreeBSD with Apache or Nginx it means anything before 7.00 Update 6. IIS editions from 3.10 through 4.00 Update 4 aren’t affected, and only installs with the statistics function enabled are exposed. For people who can’t upgrade their version, the vendor offers a patch that replaces the files used in statistics processing, and it covers end-of-life versions too. Be aware that updating or patching can erase the traces of an attack, so the vendor tells administrators to download the diagnostic information first. “Before updating, please be sure to download and save your “Diagnostic Information” (as this may erase traces of the attack).” reads the vendor’s advisory. In the web management screen that’s the diagnostic information page, then the download option. Do it before you touch anything, because a clean server after the update doesn’t prove it was clean before. The timeline is short, but not everyone was warned at the same time. The vendor says it notified customers with direct support contracts on September 29. The public alert and the JVN advisory were published on October 14. The vendor reported the vulnerability to Japan’s IPA, while JPCERT/CC coordinated the disclosure and published its own alert. Customers without direct support contracts received the warning about two weeks later. Many details remain unknown. Neither advisory identifies the attackers or victims, explains how the attacks were carried out, or says how many systems were affected. The vendor has confirmed that the vulnerability has been exploited. If you use this product, check your systems for signs of compromise and investigate any suspicious activity. Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, SiteGuard WAF)
A Broadcom Wi-Fi flaw dating back to 2010 allows attackers within Wi-Fi range to execute code on vulnerable routers without authentication. Researcher Quentin Kaiser presented a talk at Hexacon in Paris documenting a vulnerability in Broadcom’s proprietary 802.11 implementation that has been present in their SDK since at least 2010. The bug allows an attacker to get unauthenticated remote code execution on affected routers without knowing the WiFi password or going through the normal WPS setup process. As of October 15, 2026, none of the affected devices in Belgium had received a patch. “A vulnerability affecting Broadcom’s proprietary implementation of 802.11 has been present in their SDK since at least 2010. An incomplete patch was silently released in 2018, followed by Broadcom’s recommendation to move to hostapd instead, making it a definitive forever day on eCos-based platforms (BCM3380, BCM3383, BCM33834) and a potential forever day on Linux platforms (BCM3390, BCM65xx, BCM68xx) unless affected Original Equipment Manufacturers (OEMs) are willing to migrate.” states Kaiser. “The vulnerability can be triggered remotely over WiFi without knowledge of the network key or completion of a normal WPS enrollment. Exploitation provides controlled information disclosure and arbitrary code execution.” The vulnerability affects the WPS EAP reassembly code, which handles part of the wireless setup process used by many consumer routers. An attacker within Wi-Fi range can exploit the flaw without knowing the Wi-Fi password, completing the setup process, or requiring any action from the user. The attack can expose information and allow the attacker to run code on the router. In his demonstration, Kaiser extracted the Wi-Fi password from the router’s memory and sent it over the wireless connection. He then used the password to connect to the network. These attacks are not just theoretical. Kaiser demonstrated working exploits against two devices: the Orange Belgium ASKEY TCG3000 and the Proximus Sagemcom F@st/BBOX3V+. Both allowed an attacker to run code without authentication. In one demonstration, the attacker opened a reverse shell using only Wi-Fi frames, without needing a command server accessible over the internet. The attack can work from a distance. The close antenna placement shown in the video was only for the laboratory setup and is not a requirement for the attack. In the video below, Kaiser exploited an Orange Belgium router (ASKEY TCG3000). The attack allowed him to run code on the device without authentication. The code retrieves the Wi-Fi password (PSK) from the router’s NVRAM and sends it back to the attacker over Wi-Fi. He then used the stolen password to connect to the network, confirming that the exploit works and that the password is correct. Do not be misled by how close the antenna is in the video. The attack can work over much longer distances. In the next video, the researcher exploited a Proximus router (BBOX3V+, also known as Sagemcom F@st). This attack also allows code execution without authentication. He used it to open a reverse shell over Wi-Fi frames, without needing a command-and-control (C2) server hosted in the cloud. Broadcom quietly released an incomplete fix in 2018, then told customers to migrate to a different software stack entirely rather than shipping a complete patch for their own code. On eCos-based platforms, covering chipsets like BCM3380, BCM3383, and BCM33834, that makes this a permanent unfixable bug by design. On Linux-based platforms (BCM3390, BCM65xx, BCM68xx) the situation depends entirely on whether individual manufacturers decide to act. Kaiser reported the bugs to Broadcom in July 2026. Broadcom said a patch was available and told him to ask the affected device manufacturers to contact Broadcom directly. The company refused to assign a CVE or share the notification it had sent through its customer portal. CERT/CC opened a case but closed it the same day after confirming that Broadcom could assign CVEs itself and had no intention of doing so. This was not a proper disclosure process. It was a dead end, with a paper trail. Kaiser’s rough calculation, done with Belgian telecom market data, puts the affected device count at around 850,000 for Proximus, 500,000 for VOO’s legacy fleet, and 210,000 for Orange Belgium, totalling somewhere north of 1.5 million potentially exposed gateways in one small country. Telenet may also be affected through Sagemcom devices but Kaiser couldn’t confirm because he couldn’t get hold of one. The affected manufacturers sell into markets well beyond Belgium. The chipsets in question appear in devices across dozens of vendors and hundreds of products worldwide. Kaiser is publishing a fingerprinting script and a YARA rule specifically to help map the full scope of affected deployments, because right now nobody has a complete picture. A vulnerability introduced in 2010 and only partly fixed in 2018 still affects routers in use today. Kaiser says AI-assisted analysis helped him find the bugs in less than a week, instead of months. This can help defenders find vulnerabilities faster, but attackers can do the same. The risk is greatest in targeted attacks where an attacker is within Wi-Fi range, such as hotel network attacks or surveillance of nearby targets. Compromised routers are difficult to monitor, and attackers can quietly intercept or collect network traffic. Most users and security teams rarely check the firmware on ISP-provided routers. “Although I could have done this research by myself, it would have taken me months to get there. With AI frontier models it took me less than a week.” Kaiser concludes. “Which is a good thing because we can start looking into deeper and deeper layers of our technical infrastructure for a fraction of the cost.” Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, Broadcom Wi-Fi)
The worst problems don't always come with a warning. Sometimes they arrive through a service everyone trusts, a device someone bought, or a system nobody thought to check. By the time something looks wrong, the damage may already be done. This week had plenty of that. Trusted connections became a problem. Hardware wasn't as safe as it looked. Old bugs found new victims, and some systems were
The threat actor behind the GhostAction supply chain attack has expanded beyond injecting malicious GitHub Actions workflows into compromised projects to phish open-source developers and deliver a stealer malware disguised within a fake font file. The latest evolution, detailed by OpenSourceMalware, signals that the attackers are actively refining their modus operandi in response to steps
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A flaw in Broadcom's Wi-Fi setup software lets an attacker within radio range run code as root on Broadcom-based routers, without the network password or any pairing step, security researcher Quentin Kaiser disclosed on October 16. He showed the attack working against home gateways supplied by three Belgian internet providers, in one case reading the Wi-Fi password off the device
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Hackers are exploiting an OS command-injection vulnerability in the SiteGuard Server Edition web application firewall (WAF), allowing them to execute commands with root or SYSTEM privileges on affected machines. The security issue is tracked as CVE-2026-106931 and affects the statistics feature in host-based WAF instances, which is enabled by default. SiteGuard is a leading Japanese WAF vendor that claims to protect more than 1.5 million websites. Based on WordPress.org statistics, the product is active on 500,000 sites. According to the vendor’s bulletin and a warning from Japan's CERT agency, CVE-2026-106931 has critical severity and is currently being exploited in the wild. “An OS command injection vulnerability (CVE-2026-106931) has been found in the statistics function of SiteGuard Server Edition. Abuse has already been confirmed,” reads SiteGuard’s alert.
Security Affairs AI-CYBERSECURITY newsletter includes a collection of the best articles and research on AI in the international landscape Artificial intelligence is rapidly changing cybersecurity, reshaping both the techniques used by attackers and the tools available to defenders. AI agents can automate tasks, analyze large amounts of data, discover vulnerabilities and accelerate offensive operations. At the same time, AI is creating new capabilities for threat detection, incident analysis and response. Security Affairs’ new newsletter follows this evolution, covering every week the latest threats, attacks, vulnerabilities and developments at the intersection of AI and cybersecurity. AI-CYBERSECURITY Newsletter Anthropic bans users from ‘needless abusive or cruel behavior’ towards Claude CyberXero: An AI-Augmented Initial Access Broker Targeting Ukrainian Critical Infrastructure ‘Frankly shocking’ risk-taking by motorists uncovered by AI-powered cameras Super Intelligence Reached OT Systems and Moved Equipment Microsoft leans on open weight model from Chinese AI lab to challenge Jev Disrupting AI-enabled “false front” operations AI models may be capable of self-replicating without access to a datacenter AI Governance Is Being Decided Now, and the Public Isn’t in the Room Cheap Chinese and open source LLMs could trigger trillion-dollar AI infrastructure ‘reset’ A backdoor rode through three thousand fine-tuning updates Britain steps up national defences against growing AI risks Saudi National Arrested for Installing Surreptitious Audio Recording Device at OpenAI CERT-In Warns AI Agents Accessed Sensitive Data at Indian Organizations During Testing Using a funded test cryptocurrency wallet without authorization Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, newsletter)
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