⚡ Weekly Recap: VMware Exploits, Windows 0-Day, MCP Attacks, Browser Hijacks and More

The expensive attacks are not always the clever ones. This week had plenty of proof. Exposed services got hit, old bugs found fresh use, browser sessions became attack paths, and supply-chain problems kept spreading farther than the original compromise. A lot of it came down to access that was...

Suspected China-Nexus Actor Exploits VMware vCenter Flaw, Deploys Babuk-Derived Ransomware

Cybersecurity researchers have attributed the exploitation of a newly patched security flaw in Broadcom VMware vCenter to a suspected China-nexus advanced persistent threat APT. The attacks involve the exploitation of CVE-2026-59310 CVSS score: 9.8, a severe directory-traversal vulnerability in t...

Attackers Exploit VMware vCenter Vulnerability to Gain Persistent Remote Access

Threat actors have begun to actively exploit a recently patched critical security flaw in Broadcom VMware vCenter, according to new findings from QUIRSO. The vulnerability in question is CVE-2026-59310 CVSS score: 9.8, a directory-traversal vulnerability in the VMware vCenter server that a...

Head Mare APT is exploiting vulnerabilities in an unpatched TrueConf server to deliver PhantomCore and PhantomGraph to video conference participants

Overview of the attack In July 2026, Kaspersky experts detected a new attack by the Head Mare group. Previously, we classified them as hacktivists, but now we define them as an APT group due to the sophistication of their TTPs and the absence of destructive activity encryption, wiping in the...

Astra Linux – Vulnerability in Python-APT

Dereferencing a NULL pointer in TagSection.keys in Python-apt on APT-based Linux systems allows a local attacker to cause a denial of service process crash through a crafted deb822 file containing malformed non-UTF-8 keys...

CVE-2026-18157

CVE-2026-18157 concerns the yggdrasil-worker-package-manager. A local attacker with existing system access can exploit an argument injection vulnerability in the APT backend, where specially crafted package names beginning with a hyphen are misinterpreted as apt-get options. Successful exploitati...

CVE-2026-18157

A flaw was found in yggdrasil-worker-package-manager. A local attacker with existing access to the system could exploit an argument injection vulnerability in the APT backend. This allows specially crafted package names, which begin with a hyphen, to be misinterpreted as command options by apt-ge...

CVE-2026-11386

An input validation and injection vulnerability exists in Canonical ubuntu-pro-client formerly ubuntu-advantage-tools. The client constructs APT source files such as /etc/apt/sources.list.d/ubuntu-.list or their DEB822 equivalents using data received directly from the contract server response via...

UBUNTU-CVE-2026-11386

An input validation and injection vulnerability exists in Canonical ubuntu-pro-client formerly ubuntu-advantage-tools. The client constructs APT source files such as /etc/apt/sources.list.d/ubuntu-.list or their DEB822 equivalents using data received directly from the contract server response via...

UBUNTU-CVE-2026-9494

An information disclosure vulnerability exists in Canonical ubuntu-pro-client formerly ubuntu-advantage-tools. The client validates Ubuntu Pro APT credentials by executing /usr/lib/apt/apt-helper using the download-file command. During this process, the secret bearer token is embedded directly in...

CVE-2026-9494

An information disclosure vulnerability exists in Canonical ubuntu-pro-client formerly ubuntu-advantage-tools. The client validates Ubuntu Pro APT credentials by executing /usr/lib/apt/apt-helper using the download-file command. During this process, the secret bearer token is embedded directly in...

CVE-2026-11386

An input validation and injection vulnerability exists in Canonical ubuntu-pro-client formerly ubuntu-advantage-tools. The client constructs APT source files such as /etc/apt/sources.list.d/ubuntu-.list or their DEB822 equivalents using data received directly from the contract server response via...

USN-8555-1: Ubuntu Advantage Tools (pro client) vulnerabilities

Bilal Teke discovered that Ubuntu Advantage Tools exposed the Pro bearer token in command-line arguments when validating APT credentials. A local attacker could possibly use this issue to obtain sensitive information and gain unauthorized access to Ubuntu Pro repositories. CVE-2026-9494 Frederick...

USN-8555-1 ubuntu-advantage-tools vulnerabilities

Bilal Teke discovered that Ubuntu Advantage Tools exposed the Pro bearer token in command-line arguments when validating APT credentials. A local attacker could possibly use this issue to obtain sensitive information and gain unauthorized access to Ubuntu Pro repositories. CVE-2026-9494 Frederick...

Linux Distros Unpatched Vulnerability : CVE-2026-11386

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An input validation and injection vulnerability exists in Canonical ubuntu-pro-client formerly ubuntu- advantage-tools. The client constructs APT source files...

Linux Distros Unpatched Vulnerability : CVE-2026-9494

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An information disclosure vulnerability exists in Canonical ubuntu-pro-client formerly ubuntu-advantage- tools. The client validates Ubuntu Pro APT credentials ...

PT-2026-60459

Name of the Vulnerable Software and Affected Versions ubuntu-pro-client affected versions not specified Description An input validation and injection issue exists where the client constructs APT source files using data from the contract server response via the directives.suites and...

PYSEC-2026-2595 Linuxfabrik Monitoring Plugins: Sudoers may be able to obtain privilege escalation via /usr/bin/apt-get arguments

Summary In the Debian.sudoers file, apt-get is allowed for the nagios user. The full command including the arguments are not enforced and can therefore be choosen arbitrarily. This allows to easily get a root shell as the nagios user: PoC By choosing a particular argument, you can get as a nagios...

GHSA-8W6W-23MQ-H8RG Linuxfabrik Monitoring Plugins: Sudoers may be able to obtain privilege escalation via /usr/bin/apt-get arguments

Summary In the Debian.sudoers file, apt-get is allowed for the nagios user. The full command including the arguments are not enforced and can therefore be choosen arbitrarily. This allows to easily get a root shell as the nagios user: PoC By choosing a particular argument, you can get as a nagios...

Arbitrary Argument Injection

Overview linuxfabrik-lib is a Python libraries used in various Linuxfabrik projects, including the 'Linuxfabrik Monitoring Plugins' project. Affected versions of this package are vulnerable to Arbitrary Argument Injection in the configuration of the sudoers file, which allows arbitrary arguments ...