All news with #zero-day tag

Understanding Zero-Day Attacks: Risks and Defenses

🛡️ Zero-day attacks exploit software vulnerabilities that are unknown to the vendor, enabling attackers to compromise systems before patches are available. They target high-value platforms such as operating systems, web browsers, enterprise applications, and IoT devices, often using spear-phishing or zero-click techniques. Because signature-based tools frequently miss novel exploits, effective defense requires rapid patching, behavior-based detection (EDR, NDR, XDR), network segmentation, and investigative analysis of packet-level data to detect, contain, and learn from incidents.

CISA Warns: State-Backed Spyware Targeting Signal, WhatsApp

🛡️ CISA has warned that cybercriminals and state-backed actors are using spyware to target users of encrypted messaging apps including Signal, WhatsApp, and Telegram. Rather than breaking end-to-end encryption, attackers compromise devices to access messages, files, contacts, call history, and location data. Techniques include fake QR codes that link accounts to attacker-controlled devices, malicious updates, and zero-click exploits that trigger on receipt of a malformed image or file. Users are urged to keep devices and apps updated, avoid installing software from untrusted sources, and treat unexpected messages or files with suspicion.

Dartmouth Confirms Data Breach After Clop Extortion

🔒 Dartmouth College says threat actors linked to the Clop extortion gang exploited a zero-day in Oracle E-Business Suite to steal files and leak them on a dark web site. The college reported unauthorized access between August 9 and August 12, 2025, and on October 30 identified files containing names and Social Security numbers. A filing with Maine's Attorney General lists 1,494 individuals whose data was found in reviewed files and notes that financial account information was also taken. Dartmouth has not provided details on any ransom demand or the full scope of impacted people.

What Keeps CISOs Awake - Zurich's Approach to Resilience

😴 At the Global Cyber Conference 2025 in Zurich, CISOs openly confronted a profession-wide exhaustion tied to escalating cyber risk. Tim Brown distilled the anxiety into five core threats: shrinking exploit windows, persistent adversaries, third-party risk, an AI arms race, and staff burnout. The Swiss Cyber Institute's vendor-free format created a trust-based forum where peers share IOCs, run joint table-tops and adopt risk-based patching and UEBA to speed response and restore resilience.

Fortinet, Chrome 0-days and Supply-Chain Attacks Recap

⚠️ This week’s recap spotlights multiple actively exploited vulnerabilities, supply‑chain compromises, and a record cloud DDoS that forced rapid vendor responses. Fortinet disclosed a FortiWeb OS command injection (CVE-2025-58034) that was observed chained with a recent critical fix, raising concerns about silent patching and disclosure timing. Google patched an actively exploited Chrome V8 0‑day (CVE-2025-13223), and attackers continued to abuse browser notifications, malicious updates, and SaaS integrations to phish and persist. The incidents underscore urgent priorities: patch quickly, scrutinize integrations, and strengthen monitoring and response.

Commercial Spyware Targets Mobile Messaging Users Worldwide

📱 CISA warns that multiple cyber threat actors are actively using commercial spyware to target users of mobile messaging applications. These actors employ phishing, malicious device-linking QR codes, zero-click exploits, and impersonation of platforms such as Signal and WhatsApp to gain unauthorized access and deploy additional malicious payloads. CISA urges users to review updated mobile communications guidance and mitigations to reduce spyware risk.

Pre-auth RCE in Oracle Identity Manager Forces Patching

⚠️ The Cybersecurity and Infrastructure Security Agency (CISA) added a critical pre-authenticated remote code execution flaw in Oracle Identity Manager (CVE-2025-61757) to its Known Exploited Vulnerabilities catalog after active exploitation was observed. Searchlight Cyber reported that a flawed authentication filter combined with matrix/query parameters lets attackers bypass auth and reach a Groovy compile endpoint, enabling RCE through compile-time annotation processing. Oracle fixed the issue in its October 2025 Critical Patch Update; federal agencies must remediate by December 12, 2025.

Cox Enterprises Discloses Oracle E-Business Suite Breach

🔒 Cox Enterprises says hackers accessed its network after exploiting a zero-day in Oracle E‑Business Suite, with activity occurring between Aug. 9–14 and detected on Sept. 29, 2025. The company notified 9,479 impacted individuals and is offering 12 months of credit monitoring and identity protection through IDX. The Cl0p ransomware gang has claimed responsibility and posted stolen files after Oracle issued a patch on Oct. 5. Cox did not specify the types of data exposed in the notice.

CISA Adds Oracle Identity Manager Flaw to KEV List

⚠️ CISA has added CVE-2025-61757 to its Known Exploited Vulnerabilities (KEV) catalog following reports of active exploitation targeting Oracle Identity Manager. The flaw, a missing-authentication issue with a CVSS score of 9.8, affects versions 12.2.1.4.0 and 14.1.2.1.0 and was addressed in Oracle's recent quarterly updates. Searchlight Cyber researchers demonstrated that an allow-list bypass using URI tricks such as ?WSDL or ;.wadl can expose protected API endpoints and enable pre-authenticated remote code execution via the groovyscriptstatus endpoint. Federal civilian agencies must apply the patch by December 12, 2025.

Fortinet Criticized for Silent Patching of Two Zero-Days

⚠️Fortinet has faced criticism for quietly patching two zero-day vulnerabilities in its FortiWeb WAFs before publicly disclosing them. The first, CVE-2025-64446, is rated critical (CVSS 9.4) and involves a GUI path-traversal plus an authentication-bypass flaw; the second, CVE-2025-58034 (CVSS 6.7), is an OS command injection that may allow authenticated code execution. Both fixes were included in the 8.0.2 update on October 28 and have been observed exploited in the wild, prompting calls for greater transparency and urgent patching.

ThreatsDay: 0-Days, LinkedIn Spying, IoT Flaws, Crypto

🛡️ This week's ThreatsDay Bulletin highlights a surge in espionage, zero-day exploits, and organized crypto laundering across multiple countries. MI5 warned that Chinese operatives are using LinkedIn profiles and fake recruiters to target lawmakers and staff, while researchers disclosed critical flaws like a pre-auth RCE in Oracle Identity Manager and a resource-exhaustion bug in the Shelly Pro 4PM relay. The bulletin also details malicious browser extensions, new macOS stealer NovaStealer, high-profile arrests and sanctions, and continued pressure on crypto-mixing services. Patch, update, and verify identities to reduce exposure.

CISA Orders Rapid Patching for New FortiWeb Flaw Directive

🔒 CISA has ordered U.S. federal agencies to remediate a FortiWeb OS command injection vulnerability (CVE-2025-58034) within seven days after reports of active exploitation. Fortinet warns the flaw can allow an authenticated attacker to execute unauthorized code via crafted HTTP requests or CLI commands. The agency added the issue to its Known Exploited Vulnerabilities Catalog and set a November 25 deadline under BOD 22-01. CISA cited related zero-day activity (CVE-2025-64446) and recommended expedited fixes.

Hijacked VPN Credentials Drive Half of Ransomware Access

🔐 Beazley's Q3 2025 analysis shows ransomware activity rose, with three groups — Akira, Qilin and INC Ransomware — responsible for 65% of leak posts and an 11% increase in leaks versus the prior quarter. Initial access increasingly relied on valid VPN credentials (48% of incidents, up from 38%), with external service exploits accounting for 23%. The report highlights an Akira campaign abusing SonicWall SSLVPNs via credential stuffing where MFA and lockout controls were absent, and warns that stolen credentials and new infostealer variants like Rhadamanthys are fuelling the underground market. Beazley urges adoption of comprehensive MFA, conditional access and continuous vulnerability management to mitigate risk.

Fortinet warns of FortiWeb zero-day being exploited

🚨 Fortinet has released security updates to remediate a new FortiWeb zero-day tracked as CVE-2025-58034, which the vendor says is being actively exploited in the wild. The vulnerability is an authenticated OS command injection (CWE-78) that can allow an attacker to execute code via crafted HTTP requests or CLI commands without user interaction. Fortinet confirmed observed exploitation and published fixes; administrators should upgrade affected FortiWeb appliances to the patched releases as soon as possible.

Google patches V8 zero-day in Chrome; admins urged

⚠️ Google released an emergency patch for a high‑severity Type Confusion vulnerability in the V8 JavaScript engine (CVE-2025-13223), which the company says is being exploited in the wild. The flaw, rated CVSS 8.8 and discovered by Clément Lecigne of Google TAG, affects Chromium‑based browsers and can enable heap corruption and potential code execution. Administrators should prioritize updating Chrome to the patched 142.0.7444.175/.176 builds. A second V8 issue, CVE-2025-13224, is also fixed.

Silent FortiWeb Patch Raises Alarm as Critical Flaw Exploited

🔒 Fortinet's FortiWeb appliances are affected by a critical vulnerability tracked as CVE-2025-64446 that researchers say was exploited in the wild before an official advisory. The issue chains a relative path traversal to an internal CGI backend with an HTTP_CGIINFO header authentication bypass that allows unauthenticated admin impersonation and potential remote code execution. Fortinet released fixes in multiple 7.x and 8.x maintenance updates and recommends disabling HTTP/HTTPS on internet-facing management interfaces if upgrades cannot be applied immediately.

Google fixes new Chrome zero-day exploited in attacks

🔒 Google released an emergency update to address a newly discovered Chrome zero-day, CVE-2025-13223, which is being actively exploited. The high-severity flaw stems from a type confusion vulnerability in Chrome's V8 JavaScript engine and was reported by Clement Lecigne of Google's Threat Analysis Group. Patches are available in versions 142.0.7444.175/.176 for Windows, 142.0.7444.176 for macOS, and 142.0.7444.175 for Linux; users should check About Google Chrome and relaunch to apply the update.

Google Chrome fixes actively exploited V8 type bug

🛡️ Google has released emergency Chrome updates addressing two V8 engine type confusion flaws, including an actively exploited vulnerability tracked as CVE-2025-13223 (CVSS 8.8) that can lead to arbitrary code execution or crashes. The patch also fixes CVE-2025-13224 flagged by Google's AI agent Big Sleep and completes a set of seven zero-days addressed this year. Users should update Chrome to 142.0.7444.175/.176 (Windows/macOS/Linux) and apply fixes for other Chromium-based browsers when available.

Microsoft Patch Tuesday — November 2025: 60+ Vulnerabilities

🔒 Microsoft released updates addressing more than 60 vulnerabilities across Windows and related products, including a zero-day memory-corruption bug (CVE-2025-62215) that is already being exploited. Microsoft rates this issue important because exploitation requires prior access to the target device. Other high-priority fixes include a 9.8-rated GDI+ vulnerability (CVE-2025-60274) and an Office remote-code-execution flaw (CVE-2025-62199). Windows 10 users should install the enrollment fix KB5071959 before applying subsequent updates.

Logitech Confirms Data Breach After Clop Extortion Campaign

🚨 Logitech International S.A. confirmed a data breach claimed by the extortion gang Clop and disclosed the incident in a Form 8‑K filing with the U.S. SEC. The company says data was exfiltrated but that the incident has not impacted its products, business operations, or manufacturing, and that highly sensitive fields such as national ID numbers and credit card data were not stored or accessed. Logitech engaged external cybersecurity firms, attributes the intrusion to a third‑party zero‑day that was patched, and Clop has posted nearly 1.8 TB of alleged stolen data.