All CosmicBytez Labs articles tagged #DNS, across news, security advisories, how-to guides, and projects.
A newly disclosed vulnerability dubbed 'Underminr' affects approximately 88 million domains and enables attackers to bypass DNS filtering tools while...
A critical heap-corruption flaw in NLnet Labs Unbound's DNSSEC validator allows denial of service and possible remote code execution. Affects versions...
A perfect-10 CVSS vulnerability in NLnet Labs Unbound allows adversaries to poison the DNS resolver cache using promiscuous records injected into the...
Deploy Pi-hole v6 as a network-wide DNS sinkhole backed by Unbound as a self-hosted recursive resolver — eliminating ads, trackers, and malware domains...
Microsoft's May 2026 Patch Tuesday addresses 138 security vulnerabilities across its product portfolio, including 30 rated Critical — with notable DNS...
Step-by-step guide to implementing SPF, DKIM, and DMARC on your domain — eliminate email spoofing, prevent phishing, and gain full visibility into who...
Systematic audit checklist for network infrastructure security — firewall rules, segmentation, VPN configuration, DNS security, wireless security, and...
Learn how to detect and prevent ClickFix social engineering attacks using EDR rules, network monitoring, YARA signatures, and endpoint hardening. Covers...
Microsoft discloses a new ClickFix variant that uses DNS nslookup commands to retrieve and execute malicious PowerShell payloads, marking the first known...
Run thorough health checks on Active Directory infrastructure including Domain Controllers, replication, DNS, SYSVOL, FSMO roles, and critical services...
Deploy Pi-hole for network-wide ad blocking and DNS security. Includes setup, configuration, upstream DNS options, and integration with encrypted DNS.