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The Register
Bug hiding in plain sight for over a decade lands on KEV list CISA is sounding the alarm on a newly-exploited Apache ActiveMQ bug, ordering federal agencies to patch within two weeks as attackers circle a flaw that's been quietly lurking for more than a decade.…
The Hacker News
Huntress is warning that threat actors are exploiting three recently disclosed security flaws in Microsoft Defender to gain elevated privileges in compromised systems. The activity involves the exploitation of three vulnerabilities that are codenamed BlueHammer (requires GitHub sign-in), RedSun, and UnDefend, all of which were released as zero-days by a researcher known as Chaotic Eclipse (
Bleeping Computer
Microsoft warns that some Windows domain controllers are entering restart loops after installing the April 2026 security updates. [...]
The Hacker News
Cisco has announced patches to address four critical security flaws impacting Identity Services and Webex Services that could result in arbitrary code execution and allow an attacker to impersonate any user within the service. The details of the vulnerabilities are below - CVE-2026-20184 (CVSS score: 9.8) - An improper certificate validation in the integration of single sign-on (SSO)
The Register
No reports of active exploitation (yet) Watch out for more Fortinet vulns! Two critical bugs in Fortinet's sandbox could allow unauthenticated attackers to bypass authentication or execute unauthorized code on vulnerable systems.…
The Hacker News
A number of critical vulnerabilities impacting products from Adobe, Fortinet, Microsoft, and SAP have taken center stage in April's Patch Tuesday releases. Topping the list is an SQL injection vulnerability impacting SAP Business Planning and Consolidation and SAP Business Warehouse (CVE-2026-27681, CVSS score: 9.9) that could result in the execution of arbitrary database
Dark Reading
Two recently fixed prompt injections in Salesforce Agentforce and Microsoft Copilot would have enabled an external attacker to leak sensitive data.
The Hacker News
Microsoft on Tuesday released updates to address a record 169 security flaws across its product portfolio, including one vulnerability that has been actively exploited in the wild. Of these 169 vulnerabilities, 157 are rated Important, eight are rated Critical, three are rated Moderate, and one is rated Low in severity. Ninety-three of the flaws are
Krebs on Security
Microsoft today pushed software updates to fix a staggering 167 security vulnerabilities in its Windows operating systems and related software, including a SharePoint Server zero-day and a publicly disclosed weakness in Windows Defender dubbed "BlueHammer." Separately, Google Chrome fixed its fourth zero-day of 2026, and an emergency update for Adobe Reader nixes an actively exploited flaw that can lead to remote code execution.
Dark Reading
Elevation-of-privilege bugs accounted for more than half of the 165 vulnerabilities patched, with two zero-days in that mix.