The GoAhead embedded web server loaded a certificate revocation list into its default TLS backend but never turned revocation checking on, so a revoked client certificate could still pass login on affected setups. The flaw is in builds that use the OpenSSL backend with mutual-TLS, where the server checks a client certificate and vice versa, and a revocation list is configured to block revoked
Microsoft has fixed a flaw in its Authenticator app for Android that let a malicious app with no permissions pose as a trusted Microsoft app, such as Teams, and collect sign-in tokens for a victim's work account. Microsoft tracks the flaw as CVE-2026-80097 and fixed it in Authenticator for Android version 6.2606.4246, so anyone using the app should update. In the researchers' tests,
An attacker who gained access to Keystone's website obtained the key that its hardware wallets use to prove they are genuine, the company said in a statement on October 26. Someone with that key could build counterfeit devices that pass the online check owners use to verify a Keystone. A buyer who trusted a counterfeit could have their crypto stolen, but the incident did not involve
Fake login pages are nothing new, but generative AI is making them easier to build and more convincing. Attackers can recreate familiar login screens, impersonate trusted brands and tailor phishing attempts to specific employees or organizations. Some fake login pages go beyond stealing passwords. They can also capture MFA codes or hijack authenticated sessions, allowing attackers to gain
U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds PHP flaws PHP2Shell to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added the PHP PHP2Shell vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog: CVE-2026-109618 – PHP Memory Corruption Vulnerability CVE-2026-109619 – PHP Stale Internal Request-State Vulnerability On October 21, PHP released emergency patches for two critical vulnerabilities, CVE-2026-109618 and CVE-2026-109619 (CVSS score of 9.2). The flaws affect all PHP versions that handle web requests. The vulnerable code dates back to PHP 5.4, released in 2012, and resides in the PHP engine itself rather than in individual applications. Attackers can exploit the flaws to execute code remotely by sending specially crafted HTTP requests, without authentication. Exploitation attempts increased rapidly after the vulnerabilities became public. Cloudflare researchers reported tens of thousands of attempts within the first 45 minutes, hundreds of thousands in just two hours, and millions by October 22. Cyfirma reported that a group of North Korea-linked group has identified 216 hosts that may still be vulnerable to PHP2Shell. The operators communicate through a private I2P channel that Cyfirma has monitored since October 22. On October 24, they reported that 216 hosts appeared to be unpatched or only partly protected, earlier than Cyfirma expected. They are checking the systems from 21 compromised machines. At the time Cyfirma captured the conversation, the operators had already checked about one-third of the targets. “Two handles active since March 2026, coordinating in a closed I2P channel; staging infrastructure shared in-channel.” states the cybersecurity firm. “Target set and scan nodes. “On 24 October the operators reported 216 unpatched or partially mitigated hosts and named 21 scan nodes; the same addresses were seen performing web-shell tooling and upload-progress session-poisoning attempts.” The scanning is slow on purpose. Volume stays low, the machines rotate, and any node that shows filtering or rate limiting gets pulled and never reused. That’s why a rate-based alert will probably stay quiet. According to Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities, FCEB agencies have to address the identified vulnerabilities by the due date to protect their networks against attacks exploiting the flaws in the catalog. Experts also recommend that private organizations review the Catalog and address the vulnerabilities in their infrastructure. CISA orders federal agencies to fix the flaws by October 29, 2026. Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, CISA)
French energy giant ENGIE, one of the world's largest power and natural gas providers, confirmed that attackers stole customer data after breaching a marketing platform used by business partners. ENGIE operates in renewable energy, infrastructure, and customer energy supply in 30 countries, employs over 90,000 people, and reported €71.9 billion in revenue last year. An ENGIE spokesperson told BleepingComputer that it cut off the attackers' access to the compromised platform and that they didn't breach the company's internal systems. "ENGIE's internal IT systems were not compromised. ENGIE recently identified unusual data access activity within a tool used by partners as part of their customer prospecting activities and the marketing of energy offers," the spokesperson said. The ENGIE spokesperson didn't say how many customers were affected, but told BleepingComputer the incident is limited to customers in France.
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two critical PHP vulnerabilities collectively tracked as PHP2Shell to its catalog of actively exploited security flaws. Threat actors without privileges can exploit the two security issues (CVE-2026-109618 and CVE-2026-109619) in high-complexity attacks to gain remote code execution (RCE) on unpatched systems. The PHP security team patched the two flaws on Wednesday, October 21, one day after urging security teams to install the security updates as soon as they became available. Although details on the PHP2Shell security flaws (including the CVE IDs and mitigation measures shared with critical infrastructure providers) leaked and some proof-of-concept (PoC) exploits were published online before patches went live, the PHP security team said that none were functional.
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Monday confirmed active exploitation of the recently patched PHP2Shell flaws by adding them to its Known Exploited Vulnerabilities (KEV) catalog. The PHP vulnerabilities, both rated 9.2 on the CVSS scoring system, facilitate unauthenticated remote code execution on affected deployments - CVE-2026-109618 - An out-of-memory
The University of Copenhagen in Denmark confirmed that hackers accessed one of its test environments containing personal data belonging to 525,000 people. The educational organization detected the breach last Tuesday and disclosed it on Friday. In an update yesterday, the university added another 20,000 staff and students whose PIN codes were exposed. “The University of Copenhagen has confirmed a cyber attack in which hackers gained access to one of the university’s test environments,” the university says. Founded in 1479, the University of Copenhagen is Denmark’s oldest university and one of its leading research institutions. It has approximately 36,800 students and 10,700 employees, with six faculties and more than 200 research centers. The University of Copenhagen is still investigating to determine the extent of the incident, but warns that the following information may have been exposed:
South Korean police identified seven suspects linked to a cybercrime operation that breached more than 90 organizations in the country, with ARTEX AI pentesting framework used in most of the attacks. According to local media citing the Seoul Metropolitan Police, the gang leader has a background in penetration testing and worked at a cybersecurity company between 2019 and 2022. In 38 of the incidents, the threat actor demanded ransom payments of 360 million won ($270,000), promising in exchange not to leak stolen data. Authorities believe the threat actor stole 8.2 million records from compromised organizations, including educational institutes, hospitals, large corporations, and even golf courses. Yonhap News says that the gang leader is a self-taught 32 year-old hacker and started attacking organizations in September 2025.
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