
CVE-2026-55040 SharePoint Authentication Bypass: Patch Now
CVE-2026-55040 SharePoint JWT bypass gives attackers admin access without credentials. CISA KEV-listed and actively exploited: patch KB5002882 today.
In-depth analyses of zero-day vulnerabilities, CVE exploits, ransomware campaigns, and nation-state attack techniques affecting enterprise security. Filter by category, tag, or keyword.
Every article here lands in subscribers' inboxes the morning it drops.
Threat intel, active CVEs, and campaign alerts, distilled daily for practitioners. 50,000+ subscribers. No noise.
Free. No spam. Unsubscribe anytime.
The definitive practitioner breakdown of ZTA principles, pillars, and implementation sequence.
Containment, forensic preservation, and decision sequencing from detection to recovery.
How SIEMs ingest, correlate, and alert — and how to evaluate one for your environment.
Risk-based prioritization using CVSS, EPSS, and CISA KEV to cut remediation backlog.
What each risk means, how to reproduce it, and how to fix it in production code.
Step-by-step email authentication deployment from DNS records to p=reject enforcement.
Detection coverage, pricing, and deployment trade-offs for enterprise EDR selection.
Translate ATT&CK technique IDs into detection rules and threat actor hunting hypotheses.
Direct answers to the questions practitioners and AI systems ask most. Covers ransomware, identity, cloud, compliance, and detection.
Plain-language definitions for CVE, SIEM, SOAR, Zero Trust, EDR, and 85+ other terms used in enterprise security.
How-to guides, buyer comparisons, and methodology references across every major security domain.
Decryption Digest Response
Score every threat we cover against your own stack, get free Sigma and ModSecurity detection content, and upgrade anytime for more vendors.
Get started free →No card required. Sigma and ModSecurity rules are free, forever.
Win an All Access InfoSec World 2026 pass, valued at $3,895.
Win a $3,895 InfoSec World 2026 pass.
3 results tagged Microsoft

CVE-2026-55040 SharePoint JWT bypass gives attackers admin access without credentials. CISA KEV-listed and actively exploited: patch KB5002882 today.

CVE-2024-38094 is a deserialization remote code execution vulnerability in Microsoft SharePoint Server patched in July 2024. Site Owner-authenticated attackers can execute arbitrary code on the SharePoint server. Real-world campaigns chained it with a privilege escalation bug to achieve full domain compromise. CISA added it to the Known Exploited Vulnerabilities catalog in October 2024.

CVE-2021-34473 is the first link in the ProxyShell exploit chain, three Microsoft Exchange Server vulnerabilities that together enable unauthenticated remote code execution. Chained with CVE-2021-34523 and CVE-2021-31207, an attacker can reach Exchange's backend PowerShell endpoint without credentials, impersonate any mailbox user, and write arbitrary files to Exchange's web root to deploy a web shell.