Latest cybersecurity reporting from selected sources.

A China-based threat actor known for deploying Medusa ransomware has been linked to the weaponization of a combination of zero-day and N-day vulnerabilities to orchestrate "high-velocity" attacks and break into susceptible internet-facing systems

Microsoft says that Storm-1175, a China-based financially motivated cybercriminal group known for deploying Medusa ransomware payloads, has been deploying n-day and zero-day exploits in high-velocity attacks. [...]

Also, Lloyds Data Leak, Dutch Treasury Breach, Citrix Bug Exploit, Pay2Key ActivityThis week, Lloyds data leak hits 450K, Dutch treasury breach, Citrix flaw exploited, Iran-linked ransomware ops, TrueConf zero-day, Russian fraud ring sentenced, Romania targeted, patch gaps persist, and U.S. hospital breach affects 257K.

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has urged government agencies to apply patches for two security flaws impacting Synacor Zimbra Collaboration Suite (ZCS) and Microsoft Office SharePoint, stating they have been actively exploited in the wild

Interlock's post-exploit toolkit exposed Ransomware criminals exploited CVE-2026-20131, a maximum-severity bug in Cisco Secure Firewall Management Center software, as a zero-day vulnerability more than a month before Cisco patched the hole, according to Amazon security boss CJ Moses.…

The Interlock ransomware gang has been exploiting a maximum severity remote code execution (RCE) vulnerability in Cisco's Secure Firewall Management Center (FMC) software in zero-day attacks since late January. [...]

Amazon Threat Intelligence is warning of an active Interlock ransomware campaign that's exploiting a recently disclosed critical security flaw in Cisco Secure Firewall Management Center (FMC) Software

PLUS: Fake ransomware group exposed; EC blesses Google's big Wiz deal; Alleged sewage hacker cuffed; And more Infosec in Brief The former General Manager of defense contractor L3Harris’s cyber subsidiary Trenchant sold eight zero-day exploit kits to Russia, according to a court filing last week.…

British Health System Investigates Claim Amid Wave of Enterprise Data TheftsRansomware gang Clop has claimed the United Kingdom's National Health Service among its latest victims. The NHS confirmed that it is listed on a cybercriminal group's dark website, but did not comment on Clop's claims. The hack attack appears tied to Oracle E-Business Suite exploits.

Harvard University is investigating a data breach after the Clop ransomware gang listed the school on its data leak site, saying the alleged breach was likely caused by a recently disclosed zero-day vulnerability in Oracle's E-Business Suite servers. [...]

Medusa Ransomware Group Tied to Exploits of Now-Patched Zero-Day VulnerabilityRecent attacks targeting Fortra's GoAnywhere managed file transfer software exploited a "limited" number of customers who set their on-premises installations to have an administrative console publicly exposed to the internet, which the vendor recommends customers never do.

Signs Point to Multiple Exploit Chains, One Including a Zero-Day, Being EmployedData-stealing attacks targeting Oracle E-Business Suite, for which an affiliate of Russian-speaking Clop ransomware group is claiming credit, appear to have begun by August and involved multiple attack chains, of which one targeted a zero-day vulnerability, report Google threat researchers.

Deploy Emergency Patch for Zero-Day Flaw, Hunt for Signs of Intrusion, Warn ExpertsOracle patched a zero-day vulnerability in Oracle E-Business Suite and urged customers to immediately install the fix. The flaw has been exploited since August by the Clop ransomware group, and with exploit code now having leaked, experts expect to see many more attackers join the fray.

Bypassing MFA and deploying ransomware…sounds like something that rhymes with 'schmero-day' SonicWall on Monday confirmed that it's investigating a rash of ransomware activity targeting its firewall devices, following multiple reports of a zero-day bug under active exploit in its VPNs.…

SonicWall SSL VPN devices have become the target of Akira ransomware attacks as part of a newfound surge in activity observed in late July 2025

A Chinese hacking group is deploying Warlock ransomware on Microsoft SharePoint servers vulnerable to widespread attacks targeting the recently patched ToolShell zero-day exploit chain. [...]

It wasn't ransomware headlines or zero-day exploits that stood out most in this year's Verizon 2025 Data Breach Investigations Report (DBIR) — it was what fueled them. Quietly, yet consistently, two underlying factors played a role in some of the worst breaches: third-party exposure and machine credential abuse

Microsoft has revealed that a now-patched security flaw impacting the Windows Common Log File System (CLFS) was exploited as a zero-day in ransomware attacks aimed at a small number of targets

Threat actors have been exploiting a security vulnerability in Paragon Partition Manager's BioNTdrv.sys driver in ransomware attacks to escalate privileges and execute arbitrary code

Threat actors are exploiting a zero-day bug in Paragon Partition Manager's BioNTdrv.sys driver during ransomware attacks