Linux User & Group Management + sudo — Complete Admin Guide
Every Linux server has human admins, deploy users, database accounts, and service identities. Mismanaged users are a se…
Security
Nginx Reverse Proxy with Let's Encrypt SSL — Complete Production Guide
Running multiple web apps on one server — Node.js on port 3000, a Python API on 8080, a static site on 9000 — is normal…
SSH Key Authentication on Linux — Complete Setup Guide (Ed25519)
Password-based SSH login is the #1 way Linux servers get compromised. Bots guess thousands of combinations per hour; on…
SSH Hardening Checklist for Linux: Keys, No Root, Custom Port, AllowUsers
SSH is the front door to every Linux server. It is also the most attacked service on the internet — bots scan port 22 c…
Remove and Disable ABRT on RHEL 8 — Complete Security Hardening Guide
ABRT (Automatic Bug Reporting Tool) was designed to collect crash dumps and send them to bug trackers. On RHEL 8 and Fe…
How to Patch the Linux Kernel Safely on RHEL and Ubuntu (Production Guide)
Kernel vulnerabilities are among the most dangerous findings in a security audit. A single unpatched local privilege es…
Linux Firewall Basics: ufw vs firewalld — Complete Quick-Start Guide
Every Linux server exposed to the internet needs a firewall. Without one, every service listening on a port is reachabl…
Detect SSH Brute-Force Attacks on Linux (auth.log + fail2ban) — Complete Guide
Port 22 is scanned constantly. Bots hammer every public Linux server with thousands of password guesses per hour. If pa…
![[HIGH PRIORITY] Progress Kemp LoadMaster Unauth Root RCE (CVE-2026-8037)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_uxFihrhGPrRWfGqWgwt34csmuXkSw5DAMuuYqGCQHLH-hcjzo7rbPByQ5P3Qg39bO7i9rFXpheGqL5Efdg69TW4PimsbHIHcFRgZGFVZqWzi8mhfF_vebDyyzEiFUP5m0TLyhFrD4UFAP-2nhZxgZ5FX9CjDUUAeYYbSU8pCwlFVqM3Q)
[HIGH PRIORITY] Progress Kemp LoadMaster Unauth Root RCE (CVE-2026-8037)
⚠ HIGH PRIORITY — CISA KEV (Aug 7, 2026). Active exploitation confirmed. CVE-2026-8037 is an OS command injection in Pro…
![[HIGH PRIORITY] PaperCut NG/MF Authentication Bypass (CVE-2026-81578)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_tKA9JP5PvkO-qs7Q_29L38ymn7KlpNGYMYQP4FNLuYEKP4H3HnvmWvdQsQObb40WjgHiyIjIwN4DNz2JZ_D1fEVooJnRG2cPEeXUbXNhhreQrS1frwcxhMXXzhfJs77X8SImcTgNC5bH0maciJHfrPJOWw0Wfw96wle0dHg1fydF_j)
[HIGH PRIORITY] PaperCut NG/MF Authentication Bypass (CVE-2026-81578)
⚠ HIGH PRIORITY — CISA KEV (Aug 31, 2026). CVE-2026-81578 is a missing authentication flaw (CWE-306) in the PaperCut NG/…
![[HIGH PRIORITY] PaperCut NG/MF Pre-Auth RCE (CVE-2026-82078)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_tVkepOyrFZFerTzhSmfPkNP_-55FVebCrukxu9iG-H2ghNhKCWJh2JHw5ifk_5J2QOEmIT1yyYrSAmFrht6TKEW2RXUHY0x9bcxWyLpGnM29cQp3KY4r35xztq9aZXsDTipDcyK97Anhc5UAjkBVZkZvYQFvF_0bSF8mmGG-KvD1A)
[HIGH PRIORITY] PaperCut NG/MF Pre-Auth RCE (CVE-2026-82078)
⚠ HIGH PRIORITY — CISA KEV (Aug 31, 2026). Actively exploited zero-day. CVE-2026-82078 is an unsafe dynamic class-loadin…
![[HIGH PRIORITY] N-able N-central Authentication Bypass (CVE-2026-18577)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vxy5Te5w8JTY2Or1GZwU-QO6WRDkLT4yebn60yU5UX7JjWHF0THKHyHMH0p6vCC0-aRqt9wAcmwbX5bjheLNW9azISuH86WOtc1ERsBrMr86tjucwXLy_yPOyvkb93gX1ql8mR1E46w7gE5ZZ-K3-TDDkEjFuZLzIPDdeQtqyu)
[HIGH PRIORITY] N-able N-central Authentication Bypass (CVE-2026-18577)
⚠ HIGH PRIORITY — CISA KEV (Aug 2026). CVE-2026-18577 is an authentication bypass in N-able N-central RMM (incomplete fi…
![[HIGH PRIORITY] JFrog Artifactory Docker Cache Path Escape (CVE-2026-66384)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vqCcxWrASoI_YrHqGTEQpty92DtH9vpOn6mTTb1tNDubmezjIuXLYsm1zzCOdNApmcCa9M92xuOrqRcwYLwUJSRCmE55XGcFGY5Y6WDUnvBWRsDS5nCW5BV_Ge-530tjSUijXU98mpcP7MA_J1iSDX3tQ2guIpnuzPmt2e0QMhRIIY7il_)
[HIGH PRIORITY] JFrog Artifactory Docker Cache Path Escape (CVE-2026-66384)
⚠ HIGH PRIORITY — CISA KEV (Aug 27, 2026). CVE-2026-66384 is a path traversal flaw in self-hosted JFrog Artifactory. Aut…
![[HIGH PRIORITY] ownCloud WebDAV Authentication Bypass (CVE-2023-49105)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_td3GFquvtEQ49TO6mgQQUSmadZ-Ud1IUZV_g6kN04QCdniPA-EAmFS0eiwjqeKhhspPEjgAetvKIGOau-BGz0gyArfq3AbVtzBxjxMDIW-Eg1uZTlC6RFRx8xoYNiOoE2hWFUzavBqvls0J75qeyDrDwQXUfE2BT9S-XeryzO_dYgM)
[HIGH PRIORITY] ownCloud WebDAV Authentication Bypass (CVE-2023-49105)
⚠ HIGH PRIORITY — CISA KEV (Aug 27, 2026). CVE-2023-49105 is an improper-authentication flaw in ownCloud Server. Attacke…
![[HIGH PRIORITY] Gitea diffpatch Git Hook RCE (CVE-2026-60004)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_tZr-EfQI5qmMKdKgWQcr5KWpEnums1c_qFg-FpWrhi9jOzGBH8vHWoCOzoNbMEHbHjNg9ounfuy1N2iyH4iMMbEMxJMOZUOahY8eKdac7FipdYL11eEVl3F4PtwMYPkv40hZlT097JcViz3YFWmQg1HEXLbwr9uqFo6OIVoaMH)
[HIGH PRIORITY] Gitea diffpatch Git Hook RCE (CVE-2026-60004)
⚠ HIGH PRIORITY — CISA KEV (Aug 25, 2026). CVE-2026-60004 is a critical code-injection flaw in Gitea's /api/v1/repos…
![[HIGH PRIORITY] Microsoft SQL Server Remote Code Execution (CVE-2019-1068)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_siME4G2H4aZ7qb5BVQnpkfIMVX8eTBvIkUm1fTwYRghuDyF9oIy4hspJvOatN7XjF2qrVNxr4ZcxPs0E8WfFkzn6JUanbfed5ihQtFFycnbpR8Q_waigcA02Jsb-kfHemUprPQ6luz8dGpCU_j3AIUbazmU8JDiyFDb3Vrwgk)
[HIGH PRIORITY] Microsoft SQL Server Remote Code Execution (CVE-2019-1068)
⚠ HIGH PRIORITY — CISA KEV (Aug 26, 2026). CVE-2019-1068 is a remote code execution vulnerability in Microsoft SQL Serve…
![[HIGH PRIORITY] Ajax.NET Professional Deserialization RCE (CVE-2021-23758)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_tbciBMBxpufQO2bJFU6oCYOIeEdZknTxuGQEtBP_9IKHmJOH8OJq-UT_0YUzkBYnhBZMEOjtytLn4ORNJvNea3bR8vZKJOIiWNq0h1Kyk9mgm8-7pZK7UUOl-SNCqCAO6Q5PzVX2QT6-mhPobKtJqXjqGhgJcF99QustTLK6cAQO4)
[HIGH PRIORITY] Ajax.NET Professional Deserialization RCE (CVE-2021-23758)
⚠ HIGH PRIORITY — CISA KEV (Aug 26, 2026). CVE-2021-23758 is unsafe deserialization in the Ajax.NET Professional ( ajaxpr…
![[HIGH PRIORITY] Citrix NetScaler SAML Heap Overflow RCE (CVE-2026-8452)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_ulgODPQYtpbXzfps3GBsOuvXI8bkrh55lAGjw1v9QToUtcHHOw7pvx2_Lw5K2JJ_EuSb4IIQLeSmuICe8ynQb4kRJiYlxMqIG5wJmxMo9wow-c2wWoZWcvSHNHPv1oMbb0LTdS9P5gdzhAbTZIp3WLIrKzknDWgi02JRrAhtlvbaK5)
[HIGH PRIORITY] Citrix NetScaler SAML Heap Overflow RCE (CVE-2026-8452)
⚠ HIGH PRIORITY — CISA KEV (Aug 26, 2026). CVE-2026-8452 is a pre-authentication heap overflow in Citrix NetScaler ADC/G…
![[HIGH PRIORITY] Oracle WebLogic & OHS Improper Access Control (CVE-2026-21962)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_sBZRPq0Uu5sE63z7w8T1n8uy7F5DClG5jTgKm_lI3fPknU5xzLMPcXdVnaN73vWGEsCko3oLCOOjd0Dx7mvuprj_tbyPa8QcisuxuP_sk951MEZ240NV2AL3-0UpTZQNnwntHRq5ilc44b3nf8z7HiyCYmQYcfZzpWqU9lTkSgTw)
[HIGH PRIORITY] Oracle WebLogic & OHS Improper Access Control (CVE-2026-21962)
⚠ HIGH PRIORITY — CISA KEV (Aug 24, 2026). CVSS 10.0. CVE-2026-21962 is an improper-access-control flaw in Oracle HTTP S…
![[HIGH PRIORITY] Zimbra Collaboration SNMP Command Injection RCE (CVE-2026-73570)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_sA34jF8g6CYnhBPcvTubN56Gp3tB1iLyZoK6Z4llyPeG9BtPGxGAz_egND3DigbOs0Ues14SjHy2_f02qcxfGq8h3M5Zv45yVVmUeqB4fCTZXACW5EWa9VoQcPvyl6hKmj4s15rE5AGIn_3ZKx24iZmII6AVlY5HuKlCcSaf2f7g)
[HIGH PRIORITY] Zimbra Collaboration SNMP Command Injection RCE (CVE-2026-73570)
⚠ HIGH PRIORITY — CISA KEV (Aug 21, 2026). CVE-2026-73570 is an unauthenticated OS command injection in Zimbra Collabora…