A brief daily summary of what is important in information security. The podcast is published every weekday and designed to get you ready for the day with a brief, usually 5 minute long, summary of current network security related events. The content is late breaking, educational and based on listener input as well as on input received by the SANS Internet Stormcenter. You may submit questions and comments via our contact form at https://isc.sans.edu/contact.html .
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SANS Stormcast Monday, October 12th, 2026: TLP Overuse; AgentCorruption SSRF in Amazon Bedrock Agents; Palo Alto GlobalProtect VPN Exploited by Ransomware (CVE-2026-0257)
In today's episode: why the Traffic Light Protocol (TLP) should not replace internal data classification, a server-side request forgery (SSRF) flaw in Amazon Bedrock AI agents that exposed credentials through the EC2 instance metadata service (IMDS), and ransomware groups exploiting a Palo Alto Networks GlobalProtect authentication bypass. Why TLP Should Not Replace Your Internal Information Classification The Traffic Light Protocol from FIRST defines who threat intelligence may be shared with, from TLP:CLEAR to TLP:RED, but not how to protect it in transit. Organizations still need their own classification and safeguards, such as encryption, instead of sending TLP:AMBER data in plain email. https://isc.sans.edu/forums/diary/Why%20TLP%20should%20not%20replace%20your%20internal%20information%20classification/33414/ AgentCorruption: How A Single Prompt Collapsed The Entire Cloud Security Model Zenity Labs found a now-fixed server-side request forgery vulnerability in Amazon Bedrock AI agents. A prompt could make an agent fetch and reveal credentials from the EC2 instance metadata service, made possible by IMDSv1 and overly broad permissions. Restrict the URLs your AI agents can reach and always use IMDSv2. https://labs.zenity.io/post/agentcorruption-how-a-single-prompt-collapsed-the-entire-cloud-security-model Palo Alto GlobalProtect VPN Vulnerability Exploited by Ransomware (CVE-2026-0257) ReliaQuest reports ransomware actors exploiting an authentication bypass in Palo Alto Networks PAN-OS GlobalProtect and Prisma Access to open unauthorized VPN sessions. Patch VPN gateways, and keep VPN clients updated too. https://x.com/ReliaQuestTR/status/2108647641240465707 https://security.paloaltonetworks.com/CVE-2026-0257 My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich
SANS Stormcast Friday, October 9th, 2026: AI Agent Forensics; AI-Assisted Attack on South Korean Banks; IDN Typosquatting; Cisco Finesse SSRF (CVE-2026-20362)
In today's episode: new scripts for reconstructing AI agent activity during forensic investigations, an attacker's Claude chat history recovered after breaches at South Korean financial institutions, internationalized domain name (IDN) lookalikes that still get past Chrome, and an unpatched Cisco Finesse server-side request forgery (SSRF) vulnerability. Reconstructing AI Agent Activity: Two New Scripts for Forensic Review Jim Clausing released two scripts that turn the logs left behind by the OpenCode and Hermes AI agents into searchable JSON, so incident responders can see what an AI agent did on an attacker's or a victim's system. https://isc.sans.edu/diary/Reconstructing%20AI%20Agent%20Activity%3A%20Two%20New%20Scripts%20for%20Forensic%20Review/33410 Unknown Threat Actor Uses AI-Driven ARTEX to Target South Korean Finance While investigating breaches at South Korean financial institutions, CrowdStrike recovered the attacker's CLAUDE.md file and Claude chat history, a rare look at how a low-skill "prompt kiddie" uses AI to run an attack. https://www.crowdstrike.com/en-us/blog/unknown-threat-actor-uses-artex-to-target-south-korean-finance/ Turning IDN Edge Cases into Typosquats Attackers can still register convincing lookalike domains using Unicode characters that resemble Latin letters but are not on Chrome's list of known confusables. One test domain impersonating Apple displayed in Chrome but not in Safari. https://haveibeensquatted.com/blog/turning-idn-edge-cases-into-typosquats Cisco Finesse SSRF Vulnerability (CVE-2026-20362) Cisco disclosed an unauthenticated server-side request forgery vulnerability in the Cisco Finesse web-based management interface, rated High (CVSS 7.2). Details are already public, there is no workaround, and fixed releases are not expected until January or February 2027. https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-finesse-ssrf-mmSuyugS My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich
SANS Stormcast Thursday, October 8th, 2026: Atlassian Vulnerabilities; ccTLD Compormise; Outlook blocking .msix
Scans for Atlassian vulnerablity (CVE-2026-21589) https://isc.sans.edu/diary/Scans%20for%20Atlassian%20vulnerablity%20%28CVE-2026-21589%29/33406 .gh, .sl and .as ccTLD Compromise https://blog.google/security/chromes-response-to-recent-cctld-registry-hijacks/ Cisco Nexus 3000 and 9000 Series Switches Remote Code Execution Vulnerabilities https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ngoam-rce-LWKQ4BU Outlook Blocking MSIX Files https://www.bleepingcomputer.com/news/microsoft/microsoft-outlook-to-block-msix-attachments-used-in-attacks/ My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich
SANS Stormcast Wednesday, October 7th, 2026: RMM Tools; libHEIF RCE; Sonicwall SMA1000, OpenSSH updates, DNSSEC KSK Rollover
More RMM Tools In the Wild https://isc.sans.edu/diary/More%20RMM%20Tools%20In%20the%20Wild/33400 WORDPRESS LIBHEIF RCE https://fortbridge.co.uk/research/wordpress-libheif-rce/ SONICWALL SMA1000 SERIES APPLIANCES Vulnerabilities CVE-2026-102255, CVE-2026-102256, CVE-2026-102257, CVE-2026-102258 https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0017 OpenSSH 10.6 Released https://seclists.org/oss-sec/2026/q4/58 DNSSEC Root Key Signing Key Rollover https://blog.cloudflare.com/root-ksk-2024-rollover/ My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich
SANS Stormcast Tuesday, October 6th, 2026: cowrie tty Logs; Another Netscaler 0-Day; Exchange Patch
TTY Logs and the Data it Captures https://isc.sans.edu/diary/TTY%20Logs%20and%20the%20Data%20it%20Captures/33396 Citrix Netscaler SAML Vulnerability (0-Day) CVE-2026-88779 https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697174 https://community.citrix.com/techzone-blogs/110_security-updates/understanding-and-addressing-cve-2026-88779-in-citrix-netscaler-adc-and-citrix-netscaler-gateway/ Microsoft Exchange September 2026 V2 Update CVE-2026-96940 https://techcommunity.microsoft.com/blog/exchange/released-september-2026-v2-exchange-server-security-updates/4561718 My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich
SANS Stormcast Monday, October 5th, 2026: Funny User-Agents; FortMail 0-Day; GitLab Patch; macOS Full Disk Access
User Agent Strings Curiosities https://isc.sans.edu/diary/User%20Agent%20Strings%20Curiosities/33394 FortiMail Improper limitation of a pathname to a restricted directory CVE-2026-104286 https://fortiguard.fortinet.com/psirt/FG-IR-26-175 Critical GitLab Vulnerability CVE-2026-90970 https://docs.gitlab.com/releases/patches/other-patches/patch-release-gitlab-ai-gateway-19-4-1-released/ Updates to Full Disk Access in macOS https://developer.apple.com/news/?id=p6zjojqw My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich
SANS Stormcast Friday, October 2nd, 2026: ScreenConnect Abuse; ChatGPT Abuse; Spoofing iCloud; Proton Mail display name
ScreenConnect Client (Ab)used by Attackers https://isc.sans.edu/diary/ScreenConnect+Client+Abused+by+Attackers/33388/#comments Attackers abuse ChatGPT to deliver RAT via ClickFix https://www.huntress.com/blog/chatgpt-custom-gpts-clickfix-rat?_sp=51406044-aa1d-4278-a4e7-adb5b8ef84b2.1790890760100 Spoofing iCloud From Address https://sec-consult.com/blog/detail/from-anyoneicloudcom-spoofing-arbitrary-apple-icloud-identities/ Sender spoofing in Proton Mail via display-name homograph https://alonsovidales.github.io/protonmail-sender-spoofing/ My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich
SANS Stormcast Thursday, October 1st, 2026: Cisco Catalyst SD-WAN Manager 0-day; Watchguard AP RCE; OpenBao/Vault RCE; Post Quantum Certs
Cisco Catalyst SD-WAN Manager API Authentication Bypass Vulnerability CVE-2026-76504 https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-webauth-xr8beuuU WatchGuard AP Command Injection in Internal Management API Allows Command Execution https://psirt.watchguard.com/CVE-2026-86102/ A Realistic Code Execution Exploit Chain in OpenBao and Vault https://control-plane.io/posts/unauthed-to-rce-in-vault-and-openbao/ Building a post-quantum certificate authority with Merkle Tree Certificates https://blog.cloudflare.com/pq-ca-with-mtcs/ My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich
SANS Stormcast Wednesday, September 30th, 2026: Wordfence Scans; MikroTik Vulnerability; Poper Blocker Spyware
Scans for Wordfence Protected Websites https://isc.sans.edu/diary/Scans%20for%20Wordfence%20Protected%20Websites/33382 MikroTik RouterOS Vulnerability (CVE-2026-84411) https://www.cisa.gov/news-events/ics-advisories/icsa-26-272-06 Poper Blocker: The Adblocker That Spies on You https://amibeingpwned.com/blog/poper-blocker-the-adblocker-that-spies-on-you My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich
SANS Stormcast Tuesday, September 29th, 2026: MacOS/iOS 0-Day Patch; macOS priv. escalation 0-day; File Notification Attacks
Apple Emergency Patch for iOS 26, macOS26, macOS15 (CVE-2026-86950) https://isc.sans.edu/diary/Apple%20Emergency%20Patch%20for%20iOS%2026%2C%20macOS26%2C%20macOS15%20%28CVE-2026-86950%29/33376 https://support.apple.com/en-us/100100 Proof of concept for macOS CoreServices Priv. Escalation (CVE-2026-43786) https://github.com/Malwation/CVE-2026-43786 NeedyMantis: Unpacking a post-compromise malware family used in targeted operations https://www.microsoft.com/en-us/security/blog/2026/09/28/needymantis-unpacking-a-post-compromise-malware-family-used-in-targeted-operations/ File Notification Attacks https://inoti.fyi/pubs/file-notification-attacks.pdf My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich
SANS Stormcast Monday, September 28th, 2026: Macfinger Details; NetScaler 0-Day; KiteWorks 0-Day; ShinyHunters and PeopleSoft
A Closer Look at Malware From the Macfinger ClickFix Campaign https://isc.sans.edu/diary/A%20Closer%20Look%20at%20Malware%20From%20the%20Macfinger%20ClickFix%20Campaign/33368 Citrix NetScaler ADC and Citrix NetScaler Gateway Security Bulletin for CVE-2026-88771 through CVE-2026-88778 https://community.citrix.com/techzone-blogs/110_security-updates/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve-2026-88771-through-cve-2026-88778/ KiteWorks Urges Customers to Shut Down Servers https://www.heise.de/en/news/Imminent-Zero-Day-Attack-KiteWorks-Urges-Customers-to-Shut-Down-Servers-11466375.html ShinyHunters Renewed Mass Exploitation Campaign Targeting Oracle PeopleSoft https://cloud.google.com/blog/topics/threat-intelligence/shinyhunters-renewed-mass-exploitation-campaign-targeting-oracle-peoplesoft My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich
SANS Stormcast Friday, September 25th, 2026: Tricky Phishing URL; MacSync Malware Update; SolarWinds Observable Patch
One URL, Three Different Tricks https://isc.sans.edu/diary/33366 Send GitLab an email, push to main https://www.aikido.dev/blog/gitlab-email-push-to-main macOS MacSync Malware Update https://securelist.com/macsync-new-version/121383/ SolarWinds Observability Self-Hosted 2026.2.3 https://documentation.solarwinds.com/en/success_center/orionplatform/content/release_notes/hco_2026-2-3_release_notes.htm My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich
SANS Stormcast Thursday, September 24th, 2026: Macfinger ClickFix; Malicious Terraform; MikroTik and F5 Big IP Vulnerability Details
Macfinger ClickFix Campaign https://isc.sans.edu/diary/Macfinger%20ClickFix%20campaign/33360 Graphalgo campaign spreads to Terraform providers and Go Modules https://www.aikido.dev/blog/graphalgo-terraform-go-modules MikroTik vulnerabilities technical analysis, https://cert.pl/en/posts/2026/09/mikrotrick-technical-analysis/ F5 Big-IP Vulnerability Details CVE-2026-94127 https://labs.watchtowr.com/is-this-a-joke-in-the-auth-header-f5-big-ip-unauth-heap-overflow-to-rce-cve-2026-94127/ My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich podscan_ceKfRJw0F1fvyCUUhxsyFRhNvabT1TnF
SANS Stormcast Wednesday, September 23rd, 2026: GET with Body; Checkpoint, VeloCloud, BigIP and Microsoft Defender 0-days
The Truth about GET and HTTP Standards https://isc.sans.edu/diary/The%20Truth%20about%20GET%20and%20HTTP%20Standards/33358 CVE-2026-93616: 0-Day Remote Code Execution Vulnerability patch in Checkpoint Management Server https://support.checkpoint.com/results/sk/sk1000171/ VeloCloud Orchestrator (VCO) Patch for Exploited Vulnerability CVE-2026-93952 https://www.arista.com/en/support/advisories-notices/security-advisory/24765-security-advisory-0183 F5 BigIP APM Exploited Vulnerability Patched CVE-2026-94127 https://my.f5.com/manage/s/article/K000162605 My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich
SANS Stormcast Tuesday, September 22nd, 2026: PNG Stego Analysis; NPM BTree Malware; Pi-Hole Advisory
TerminalFix PNG Steganography https://isc.sans.edu/diary/TerminalFix%3A%20PNG%20Steganography/33318 NPM Btree Malware Campaign Without Install Script https://checkmarx.com/zero-post/npm-btree-malware-campaign-affects-millions-of-downloads-no-need-for-install-script/ Pi-Hole Update and Advisory https://github.com/pi-hole/FTL/security/advisories/GHSA-2794-hrj8-5jg9 My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich