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Dark Reading
CVE-2025-53521 was initially disclosed in October as a high-severity denial-of-service (DoS) flaw, but new information has revealed the bug is actually much more dangerous.
The Register
Researchers say attackers are already looting vulnerable boxes In-the-wild exploitation of a critical Citrix NetScaler bug has begun less than a week after disclosure, with researchers warning that attackers are already poking and pillaging vulnerable boxes.…
Bleeping Computer
F5 has reclassified a BIG-IP APM denial-of-service (DoS) vulnerability as a critical-severity remote code execution (RCE) flaw, warning that attackers are exploiting it to deploy webshells on unpatched devices. [...]
Bleeping Computer
Attackers are now actively exploiting a critical vulnerability in Fortinet's FortiClient EMS platform, according to threat intelligence company Defused. [...]
The Hacker News
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday added a critical security flaw impacting F5 BIG-IP Access Policy Manager (APM) to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation. The vulnerability in question is CVE-2025-53521 (CVSS v4 score: 9.3), which could allow a threat actor to achieve remote code execution. "When a
The Hacker News
Proofpoint has disclosed details of a targeted email campaign in which threat actors with ties to Russia are leveraging the recently disclosed DarkSword exploit kit to target iOS devices. The activity has been attributed with high confidence to the Russian state-sponsored threat group known as TA446, which is also tracked by the broader cybersecurity community under the monikers Callisto,
The Hacker News
Apple is now sending Lock Screen notifications to iPhones and iPads running older versions of iOS and iPadOS to alert users of web-based attacks and urge them to install the update. The development was first reported by MacRumors. "Apple is aware of attacks targeting out-of-date iOS software, including the version on your iPhone. Install this critical update to protect your iPhone," the
Dark Reading
Nation-state malware is being sold on the Dark Web and leaked to GitHub; and ordinary organizations might not stand much of a chance of defending themselves.
Bleeping Computer
The Cybersecurity and Infrastructure Security Agency (CISA) is warning that hackers are actively exploiting a critical vulnerability identified as CVE-2026-33017, which affects the Langflow framework for building AI agents. [...]
Bleeping Computer
The Coruna exploit kit is an evolution of the framework used in the Operation Triangulation espionage campaign, which in 2023 targeted iPhones via zero-click iMessage exploits. [...]