New Malware Libraries means New Signatures
https://isc.sans.edu/diary/%5BGuest%20Diary%5D%20%20New%20Malware%20Libraries%20means%20New%20Signatures/32986
Addressing Exchange Server May 2026 vulnerability CVE-2026-42897
https://techcommunity.microsoft.com/blog/exchange/addressing-exchange-server-may-2026-vulnerability-cve-2026-42897/4518498
Microsoft Authenticator Update CVE-2026-41615
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41615
ssh-keysign-pwn (CVE-2026-46333) Patches Released
https://almalinux.org/blog/2026-05-15-ssh-keysign-pwn-cve-2026-46333/

Tearing apart website fraud to see how it works. (@sans_edu)
https://isc.sans.edu/diary/%5BGUEST%20DIARY%5D%20Tearing%20apart%20website%20fraud%20to%20see%20how%20it%20works./32958
Simple bypass of the link preview function in Outlook Junk folder
https://isc.sans.edu/diary/Simple%20bypass%20of%20the%20link%20preview%20function%20in%20Outlook%20Junk%20folder/32990
NGINX Vulnerability
https://depthfirst.com/nginx-rift
Cisco SDWan 0-Day
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa2-v69WY2SW

Proxying the Unproxyable? Sending EXE traffic to a Proxy
https://isc.sans.edu/diary/Proxying%20the%20Unproxyable%3F%20Sending%20EXE%20traffic%20to%20a%20Proxy/32982
New Nightmare Eclipse Vulnerabilities Disclosed
https://github.com/Nightmare-Eclipse/YellowKey
https://github.com/Nightmare-Eclipse/GreenPlasma
Adobe Patches
https://helpx.adobe.com/security.html

Microsoft Patch Tuesday
https://isc.sans.edu/diary/32980
Tanstack npm and others compromised
https://socket.dev/blog/tanstack-npm-packages-compromised-mini-shai-hulud-supply-chain-attack
Ruby Gems Attack
https://x.com/maciejmensfeld/status/2054164602577940619

Apple Patches Everything
https://isc.sans.edu/diary/Apple%20Patches%20Everything/32976
End-to-End Encrypted RCS Messages
https://www.apple.com/newsroom/2026/05/end-to-end-encrypted-rcs-messaging-begins-rolling-out-today-in-beta/
Why we use CAPTCHAs
https://isc.sans.edu/diary/Why%20we%20use%20CAPTCHAs/32974
Checkmarx Jenkins AST plugin compromise
https://checkmarx.com/blog/ongoing-security-updates/

Another Universal Linux Local Privilege Escalation (LPE) Vulnerability: Dirty Frag
https://isc.sans.edu/diary/Another%20Universal%20Linux%20Local%20Privilege%20Escalation%20%28LPE%29%20Vulnerability%3A%20Dirty%20Frag/32968
PAM Backdoors Steel Passwords
https://flare.io/learn/resources/blog/pamdoora-new-linux-pam-based-backdoor-sale-dark-web
CPanel Updates
https://support.cpanel.net/hc/en-us/sections/360007088193-Security
Let s Encrypt Briefly Halts Certificate Issuance
https://letsencrypt.status.io

An Adaptive Cyber Analytics UI for Web Honeypot Logs
https://isc.sans.edu/diary/An%20Adaptive%20Cyber%20Analytics%20UI%20for%20Web%20Honeypot%20Logs%20%5BGuest%20Diary%5D/32962
Ivanti May Patchday
https://hub.ivanti.com/s/article/May-2026-Security-Advisory-Ivanti-Endpoint-Manager-Mobile-EPMM-Multiple-CVEs
Redis Security advisory: [CVE 2026 23479] [CVE 2026 25243] [CVE-2026-25588] [CVE 2026 25589] [CVE-2026-23631]
https://redis.io/blog/security-advisory-cve202623479-cve202625243-cve-2026-25588-cve202625589-cve-2026-23631/
@sans_edu research paper: Marcio Enriquez
[link will be added once the paper has been published]

Technical issue with .de domains
https://blog.denic.de/en/technical-issue-with-de-domains-resolved/
CVE-2026-0300 PAN-OS: Unauthenticated user initiated Buffer Overflow Vulnerability in User-ID Authentication Portal
https://security.paloaltonetworks.com/CVE-2026-0300
Android Security Bulletin May 2026 CVE-2026-0073
https://source.android.com/docs/security/bulletin/2026/2026-05-01

Cleartext Passwords in MS Edge? In 2026?
https://isc.sans.edu/diary/Cleartext%20Passwords%20in%20MS%20Edge%3F%20In%202026%3F/32954
SSL.com rotates its root certificate today
https://isc.sans.edu/diary/SSL.com%20rotates%20their%20root%20certificate%20today/32956
DEAMONTOOLS Compromise
https://securelist.com/tr/daemon-tools-backdoor/119654/

DShield Honeypot Update
https://isc.sans.edu/diary/DShield%20Honeypot%20Update/32948
MOVEit Automation Critical Security Alert Bulletin April 2026 (CVE-2026-4670, CVE-2026-5174)
https://community.progress.com/s/article/MOVEit-Automation-Critical-Security-Alert-Bulletin-April-2026-CVE-2026-4670-CVE-2026-5174
Apache httpd http2 vulnerability
https://seclists.org/oss-sec/2026/q2/387