
Show Notes
1. PaperCut ships a second emergency patch after attackers chain two zero-days — CVE-2026-82078, CVE-2026-81578 — SecurityWeek — https://www.securityweek.com/more-details-emerge-on-exploited-papercut-vulnerabilities/ 2. Ruby on Rails file-read flaw is being exploited for remote code execution — CVE-2026-66066 — SecurityWeek — https://www.securityweek.com/critical-ruby-on-rails-vulnerability-in-attackers-crosshairs/ 3. Self-spreading worm planted in an npm package with 150,000 weekly downloads — Cyber Security News — https://cybersecuritynews.com/popular-npm-package/ 4. China-linked Fire Ant moves into Cisco routers and TACACS servers to blind logging — The Hacker News — https://thehackernews.com/2026/08/china-linked-fire-ant-hijacks-cisco.html 5. AWS Systems Manager agent path traversal lets a limited user write files as root — CVE-2026-81849 — AWS Security Bulletin — https://aws.amazon.com/security/security-bulletins/rss/2026-091-aws/ 6. TerminalFix pastes a fake CAPTCHA command into Windows Terminal and opens a reverse tunnel — Microsoft Security — https://www.microsoft.com/en-us/security/blog/2026/08/28/terminalfix-campaign-deploys-reverse-tunnel-through-multistage-intrusion/ 7. Fake IT help desk calls over external Teams accounts end in NTLM relay to the domain controller — Unit 42 — https://unit42.paloaltonetworks.com/spring-ring-voice-phishing-campaigns/ 8. Infostealers are lifting live Claude sessions and walking past two-factor — Help Net Security — https://www.helpnetsecurity.com/2026/08/31/claude-accounts-compromised-through-infostealer/ 9. Nineteen Chrome and Edge extensions were backdoored through automatic updates — The Hacker News — https://thehackernews.com/2026/08/19-chrome-and-edge-extensions-found.html 10. Russian operators embed a nuclear-weapons prompt in malware to make AI analysis tools refuse — Help Net Security — https://www.helpnetsecurity.com/2026/08/31/russian-hackers-ai-safety-filters-manipulation/ 11. A file that passes as an MP4 carries 6.5 MB of encrypted NetSupport RAT — Censys — https://censys.com/blog/fake-mp4-file-carries-malicious-payload/ 12. Voicemail-themed SVG attachments smuggled JavaScript past email filters at 5,527 organizations — Infosecurity Magazine — https://www.infosecurity-magazine.com/news/fake-voicemail-svg-files-bypass/ 13. ValleyRAT ships as signed adware so users add it to their own exclusion lists — Securelist — https://securelist.com/valleyrat-backdoor-adware/121175/ 14. Metasploit ships modules for Forgejo file read and a batch of other recent flaws — CVE-2026-59774, CVE-2026-3576 — Rapid7 — https://www.rapid7.com/blog/post/pt-metasploit-wrap-up-payloads-exploits-scanners 15. Composer flaw lets a malicious package change permissions on files it does not own — CVE-2026-59944 — Cyber Security News — https://cybersecuritynews.com/composer-flaw-expose-ssh-keys/ 16. UK NCSC warns of rising OT targeting through internet-exposed systems and edge devices — Industrial Cyber — https://industrialcyber.co/control-device-security/uk-ncsc-warns-of-increased-ot-targeting-as-threat-actors-exploit-internet-exposed-systems-and-edge-devices/ 17. CISA red team walked one network to domain admin and struggled badly in the other — Cybersecurity Dive — https://www.cybersecuritydive.com/news/cisa-red-team-exercises-lessons-cloud-soc/828733/ 18. Microsoft tells everyone to ignore Defender alerts saying antivirus is off — BleepingComputer — https://www.bleepingcomputer.com/news/microsoft/microsoft-asks-users-to-ignore-antivirus-is-turned-off-errors/
More from Daily DefSec Brief
Attackers are now exploiting PHP2Shell, a poisoned LiteLLM release carried a stealer for AI and cloud keys, and Fortinet shipped critical fixes while holding the CVEs until November 10. Every version number and every fix in this episode was checked against the vendor's own advisory or the researchers' report before it aired. Today's question: How do you check that your security alerts still reach a person? Reply in the comments or at [email protected].
PHP ships fixes today for two critical flaws whose details leaked ahead of disclosure, and a certificate authority's signing keys turned out to be guessable, one of them the number four. Also: a joint advisory on SafePay ransomware, a hijacked account that swapped OVHcloud's CLI downloads for a stealer, and a test account with the password Password1. Fixes were checked against the vendor's advisory or release notes where one exists, and against the researchers' report where not. Today's question: How does your team find accounts that should have been deleted? Reply in the comments or at [email protected].
The NetScaler flaw that crashed appliances is a step in a root takeover whose implant tries to copy itself to the HA partner. ClickFix crews bring a signed Siemens program to run their malware, Plex servers are being hijacked a day after an exploit went public, and a fake WatchGuard download site collects VPN logins. Every version number and every fix in this episode was checked against the vendor's advisory, release notes or the CVE record before it aired. Today's question: Where does your team tell people to get the VPN client? Reply in the comments or at [email protected].
Attackers used ConnectWise's app credentials to enter Microsoft 365 tenants. Also: a FortiGate implant, stolen UpdraftCentral keys, NTLMv1 blocks, AOMEI's update servers, and fixes. Every version number and every fix in this episode was checked against the vendor's advisory or the CVE record before it aired. Today's question: How do you review vendor apps in your tenant? Reply in the comments or at [email protected].
Attackers are using a BeyondTrust Remote Support zero-day and the Atlassian Data Center file-read flaw. Also: Office Preview Pane flaws, AI coding tokens stolen, Drupal, Next.js and NGINX fixes, hijacked NAS boxes, spyware in ads, and AI agents on leaked credentials. Every version number and every fix in this episode was checked against the vendor's own advisory before it aired. Today's question: Where do your developers' AI tool tokens live, and how long do they last? Reply in the comments or at [email protected].