Top stories:

• 19-Year-Old Linux Kernel Vulnerability Exposes Systems to Root Access - SecurityWeek: https://www.securityweek.com/19-year-old-linux-kernel-vulnerability-exposes-systems-to-root-access/

• Dashlane Discloses Brute-Force Attack, Encrypted Vaults of Fewer Than 20 Users Downloaded: https://thehackernews.com/2026/06/dashlane-discloses-brute-force-attack.html

• Google Unveils AI Threat Defense Platform to Fight AI-Powered Cyberattacks - SecurityWeek: https://www.securityweek.com/google-unveils-ai-threat-defense-platform-to-fight-ai-powered-cyberattacks/

• Introducing TailscaleHound: Mapping Tailscale Attack Paths in BloodHound - SpecterOps: https://specterops.io/blog/2026/05/21/tailscalehound/

• Making Vulnerable Drivers Exploitable Without Hardware - The BYOVD Perspective: https://thehackernews.com/2026/05/making-vulnerable-drivers-exploitable.html

• The New Phishing Click: How OAuth Consent Bypasses MFA: https://thehackernews.com/2026/05/the-new-phishing-click-how-oauth.html

• What 2,000 Exposed Vibe-Coded Apps Reveal About the Limits of Most Security Stacks: https://thehackernews.com/2026/05/what-2000-exposed-vibe-coded-apps.html

A walkthrough of Conserve Mode on FortiGates.

SOURCE:

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https://docs.fortinet.com/document/fortigate/7.6.3/administration-guide/194558/conserve-mode

A walkthrough of IPSEC and how it works.

SOURCES:

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• https://aws.amazon.com/what-is/ipsec/
• https://www.cloudflare.com/learning/network-layer/what-is-ipsec/
• https://www.paloaltonetworks.com/cyberpedia/what-is-ipsec
• https://www.cbtnuggets.com/blog/certifications/security/what-is-ipsec
• https://www.catonetworks.com/glossary/ipsec-vpn/
• https://tailscale.com/learn/ipsec

DMARC, DKIM, and SPF: Email Authentication Explained

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Sources:

• https://www.valimail.com/blog/dmarc-dkim-spf-explained/ 
• https://www.mimecast.com/content/dkim-spf-dmarc-explained/  
• https://www.techtarget.com/searchsecurity/answer/Email-authentication-How-SPF-DKIM-and-DMARC-work-together  
• https://github.com/nicanorflavier/spf-dkim-dmarc-simplified  

https://easydmarc.com/blog/whats-the-difference-between-spf-dkim-and-dmarc/  

A walk-through of Windows Volume Shadow Copy Service

Sources:

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• https://learn.microsoft.com/en-us/windows-server/storage/file-server/volume-shadow-copy-service
• https://learn.microsoft.com/en-us/windows/win32/vss/about-the-volume-shadow-copy-service
• https://learn.microsoft.com/en-us/windows/win32/vss/the-vss-model
• https://learn.microsoft.com/en-us/windows/win32/vss/common-volume-backup-issues
• https://learn.microsoft.com/en-us/windows/win32/vss/basic-vss-concepts
• https://learn.microsoft.com/en-us/windows/win32/vss/the-volume-shadow-copy-service
• https://learn.microsoft.com/en-us/windows/win32/vss/shadow-copies-and-shadow-copy-sets
• https://learn.microsoft.com/en-us/windows/win32/vss/providers
• https://learn.microsoft.com/en-us/windows/win32/vss/requestors
• https://learn.microsoft.com/en-us/windows/win32/vss/writers

An overview of how hardware acceleration works on FortiGates.

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Sources:

• https://docs.fortinet.com/document/fortigate/7.6.3/hardware-acceleration/448300/hardware-acceleration
• https://docs.fortinet.com/document/fortigate/7.6.3/hardware-acceleration/622344/content-processors-cp10-cp9-cp9xlite-cp9lite
• https://docs.fortinet.com/document/fortigate/7.6.3/hardware-acceleration/575471/network-processors-np7-np7lite-np6-np6xlite-and-np6lite
• https://docs.fortinet.com/document/fortigate/7.6.3/hardware-acceleration/765824/np7-and-np7lite-acceleration

• https://fortinetweb.s3.amazonaws.com/docs.fortinet.com/v2/attachments/a9e30e94-c210-11ee-8c42-fa163e15d75b/fortios-hardware-acceleration-743.pdf

A walkthrough of the automatic certificate management environment (ACME) feature.

Source:

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• https://datatracker.ietf.org/doc/html/rfc8555/