Latest cybersecurity reporting from selected sources.

On July 2, 2026, CISA added CVE-2026-45659, a SharePoint Server RCE, to its Known Exploited Vulnerabilities catalog with a two-day patch deadline. Storm-2603 is using it to stage Warlock ransomware, living off the land the whole way. Here is why it matters, plus a free 12-rule Sigma pack to hunt it.

CISA confirms BlueHammer (CVE-2026-33825) is now used in ransomware attacks to gain SYSTEM privileges through Microsoft Defender. BlueHammer, tracked as CVE-2026-33825, has moved from proof-of-concept noise to real ransomware attacks in the wild, the US CISA confirms. BlueHammer allows attackers to escalate privileges locally in Microsoft Defender. The vulnerability, along with two other zero-days dubbed […]

CISA confirmed on Monday that ransomware gangs are now exploiting a Microsoft Defender privilege escalation vulnerability, dubbed BlueHammer, that has previously been abused in zero-day attacks. [...]

CISA has ordered U.S. government agencies to secure their Check Point Remote Access VPN and Mobile Access deployments against a critical vulnerability exploited in zero-day attacks by Qilin ransomware affiliates. [...]

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

Hackers are actively exploiting the CVE-2026-1731 vulnerability in the BeyondTrust Remote Support product, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) warns. [...]

CISA confirmed on Wednesday that ransomware gangs have begun exploiting a high-severity VMware ESXi sandbox escape vulnerability that was previously used in zero-day attacks. [...]

GreyNoise's Glenn Thorpe counts the cost of missed opportunities On 59 occasions throughout 2025, the US Cybersecurity and Infrastructure Security Agency (CISA) silently tweaked vulnerability notices to reflect their use by ransomware crooks. Experts say that's a problem.…

CISA this week added CVE-2025-24472 to its catalog of known exploited vulnerabilities, citing ransomware activity targeting the authentication bypass flaw.

The US Cybersecurity and Infrastructure Security Agency added flaws in Fortinet and a popular GitHub Action to its Known Exploited Vulnerabilities catalog

1 in 3 entries are used to extort civilians, says new paper Fresh research suggests attackers are actively monitoring databases of vulnerabilities that are known to be useful in carrying out ransomware attacks.…

FBI and CISA issue reminder - deep sigh - about the importance of patching and backups The operators of Ghost ransomware continue to claim victims and score payments, but keeping the crooks at bay is possible by patching known vulnerabilities and some basic infosec actions, according to a joint advisory issued Wednesday by the FBI and US Cybersecurity and Infrastructure Security Agency.…

CISA has added CE-2024-40766 to its known exploited vulnerabilities catalog.

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a critical security flaw impacting Jenkins to its Known Exploited Vulnerabilities (KEV) catalog, following its exploitation in ransomware attacks

​CISA has added a critical Jenkins vulnerability that can be exploited to gain remote code execution to its catalog of security bugs, warning that it's actively exploited in attacks. [...]

CISA has ordered U.S. Federal Civilian Executive Branch (FCEB) agencies to secure their servers against a VMware ESXi authentication bypass vulnerability exploited in ransomware attacks. [...]

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a high-severity Windows vulnerability abused in ransomware attacks as a zero-day to its catalog of actively exploited security bugs. [...]

CISA’s RVWP program sent 1754 ransomware vulnerability notifications to government and critical infrastructure entities in 2023, leading to 852 devices being secured

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday added a now-patched security flaw impacting Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) software to its Known Exploited Vulnerabilities (KEV) catalog, following reports that it's being likely exploited in Akira ransomware attacks

Multiple threat actors, including LockBit ransomware affiliates, are actively exploiting a recently disclosed critical security flaw in Citrix NetScaler application delivery control (ADC) and Gateway appliances to obtain initial access to target environments