CVE-2025-50328

CVE-2025-50328 affects B1 Free Archiver v1.5.86. The vulnerability occurs when files extracted from downloaded archives do not propagate the Zone.Identifier (MotW) ADS to extracted files, allowing them to bypass Windows Defender SmartScreen and security prompts. This can enable untrusted code exe...

PT-2026-36002

Name of the Vulnerable Software and Affected Versions B1 Free Archiver version 1.5.86 Description An issue exists where files extracted from downloaded archives bypass Windows Mark of the Web MotW protections. The software fails to propagate the Zone.Identifier alternate data stream—a mechanism...

Five defender priorities from the Talos Year in Review

A familiar theme in security right now is that the barrier to entry for attackers is at an all-time low. AI tools can spin up websites within minutes that can easily direct data to disposable external data stores and send alerts for new captures -- all without code. One such case was recently...

Dynamic Cyber Ranges

As LLM-driven agents advance in cybersecurity, Jeopardy CTF benchmarks are approaching saturation and cyber ranges, the natural next evaluation frontier, offer diminishing resistance under their current static design. We validate this observation by deploying an LLM-driven Advanced Persistent...

Don’t Wait for a Patch. Mitigate RedSun Zero-Day Risk in Microsoft Defender Today

Key Takeaways RedSun is a critical zero-day vulnerability in Microsoft Defender that allows low-privileged users to gain SYSTEM access No patch is currently available, leaving all Defender-enabled Windows systems potentially exposed Qualys VMDR detects affected assets instantly QID 92382 TruRisk...

Exploit for Insufficient Granularity of Access Control in Microsoft

🔨 CVE-2026-33825: BlueHammer Microsoft Defender Elevation o...

CISA Adds One Known Exploited Vulnerability to Catalog

CISA has added one new vulnerability to its Known Exploited Vulnerabilities KEV Catalog, based on evidence of active exploitation. CVE-2026-33825link is external Microsoft Defender Insufficient Granularity of Access Control Vulnerability This type of vulnerability is a frequent attack vector for...

Microsoft Defender Insufficient Granularity of Access Control Vulnerability

Microsoft Defender contains an insufficient granularity of access control vulnerability that could allow an authorized attacker to escalate privileges locally...

Detection strategies across cloud and identities against infiltrating IT workers

In this article 1. Attack chain overview 1. Activities in pre-recruitment phase 2. Activities in recruiting phase 3. Activities in post-recruitment phase 2. Mitigation and protection guidance 3. Microsoft Defender XDR detections The shift to remote and hybrid work since the pandemic expanded glob...

Three Microsoft Defender Zero-Days Actively Exploited; Two Still Unpatched

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, an...

April Microsoft Patch Tuesday

April Microsoft Patch Tuesday. A total of 167 vulnerabilities, about twice as many as in March. There is one vulnerability already being exploited in the wild: 🔻 Spoofing - Microsoft SharePoint Server CVE-2026-32201. ZDI experts say "Spoofing bugs in SharePoint often manifest as cross-site...

ThreatsDay Bulletin: Defender 0-Day, SonicWall Brute-Force, 17-Year-Old Excel RCE and 15 More Stories

You know that feeling when you open your feed on a Thursday morning and it's just... a lot? Yeah. This week delivered. We've got hackers getting creative in ways that are almost impressive if you ignore the whole "crime" part, ancient vulnerabilities somehow still ruining people's days, and enoug...

VulnCheck KEV: CVE-2026-33825

Insufficient granularity of access control in Microsoft Defender allows an authorized attacker to elevate privileges locally...

Security Updates for Windows Defender (April 2026)

The Antimalware Platform version of Microsoft Windows Defender installed on the remote Windows host is prior to 4.18.26030.3011. It is, therefore, affected by a privilege escalation vulnerability: - Insufficient granularity of access control in Microsoft Defender allows an authorized attacker to...

CVE-2026-33825

Insufficient granularity of access control in Microsoft Defender allows an authorized attacker to elevate privileges locally...

April Patch Tuesday fixes two zero-days, including one under active attack

This month’s patch Tuesday looks to remediate 167 security vulnerabilities including two zero-day vulnerabilities, one of which is known to be actively exploited in the wild. This makes April one of those months where “Patch Tuesday” looks more like “patch the entire stack,” from servers and...

Microsoft Defender’s inability to address vulnerabilities

Microsoft has identified a vulnerability in System Center. A malicious individual could exploit this vulnerability by allowing Windows Defender to apply insufficient access control, thereby enabling an authorized attacker to escalate their privileges locally. UPDATE If Microsoft Defender...

Patch Tuesday, April 2026 Edition

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...

EUVD-2026-22643

Insufficient granularity of access control in Microsoft Defender allows an authorized attacker to elevate privileges locally...

CVE-2026-33825

Insufficient granularity of access control in Microsoft Defender allows an authorized attacker to elevate privileges locally...