Daily DefSec Brief

Cyber Security News for August 19 2026 - Daily DefSec Brief

Daily DefSec Brief

Show Notes

1. Windows IKE Extension RCE added to CISA KEV, now exploited — CVE-2026-33824 — CISA KEV — https://www.cisa.gov/known-exploited-vulnerabilities-catalog 2. macOS Screen Sharing auth bypass added to CISA KEV — CVE-2026-65400 — CISA KEV — https://www.cisa.gov/known-exploited-vulnerabilities-catalog 3. MLflow SSRF and FUXA auth-bypass under active exploitation — CVE-2026-64849, CVE-2026-25895 — The Hacker News — https://thehackernews.com/2026/08/attackers-exploit-mlflow-ssrf-flaw-to.html 4. Cursor IDE zero-day runs code on repo open — Cyber Security News — https://cybersecuritynews.com/cursor-0-day-vulnerability/ 5. CoSnitch: one-click Copilot data exfiltration — CVE-2026-24301, CVE-2026-24299 — The Hacker News — https://thehackernews.com/2026/08/microsoft-copilot-personal-flaws-could.html 6. Chrome ships two critical graphics-component fixes — CVE-2026-76034, CVE-2026-76036 — Chrome Releases — http://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0826575033.html 7. Firefox 154 patches 58 flaws, 20 high-severity — SecurityWeek — https://www.securityweek.com/chrome-firefox-updates-patch-dozens-of-vulnerabilities/ 8. Oracle August CSPU ships 943 patches for 925 CVEs — Tenable — https://www.tenable.com/blog/oracle-august-2026-critical-security-patch-update-cspu-addresses-925-cves 9. TWINLOOT runs C2 inside Microsoft cloud services — The Hacker News — https://thehackernews.com/2026/08/twinloot-abuses-sharepoint-and-teams-to.html 10. NASA AIT-GUI flaw lets unauthenticated spacecraft commands — GHSA-p9r8-2q67-fp86 — Infosecurity Magazine — https://www.infosecurity-magazine.com/news/nasa-ground-control-software-flaw/ 11. BeyondTrust EPM for Windows privilege-escalation flaws — CVE-2026-40144, CVE-2026-40145 — Cyber Security News — https://cybersecuritynews.com/beyondtrust-windows-epm-vulnerabilities/ 12. 50,000 Stripe merchant API keys leaked in public code — Security Affairs — https://securityaffairs.com/197504/cyber-crime/50000-stripe-secrets-leaked-in-public-code.html 13. Slovakia finds Russian SMS-triggered backdoor in traffic cameras — Risky Business News — https://news.risky.biz/risky-bulletin-slovakia-finds-russian-backdoor-in-traffic-speed-cameras/ 14. Rapid7 report: volume and speed outpace traditional patch cycles — SecurityWeek — https://www.securityweek.com/ai-driven-vulnerability-surge-breaks-the-traditional-patching-model/ 15. Self-propagating payloads spread between AI agents via shared prompt files — The Hacker News — https://thehackernews.com/2026/08/ai-mind-viruses-can-spread-between.html

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Oct 22, 2026

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].

Oct 21, 2026

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].

Oct 20, 2026

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].

Oct 19, 2026

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].

Oct 16, 2026

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].

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