1. Substance:
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GitHub Copilot RCE via Prompt Injection — A critical Remote Code Execution vulnerability has been discovered in GitHub Copilot and its VS Code extension. Attackers can embed malicious instructions (“prompt injection”) that Copilot executes, potentially leading to full system compromise. Cyber Security News+6Cyber Security News+6gbhackers.com+6
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CISA Adds WinRAR Zero-Day (CVE‑2025‑8088) to KEV — The Path Traversal flaw in WinRAR (≤ 6.25) is being actively exploited by the RomCom threat group. CISA has added it to its Known Exploited Vulnerabilities list. Users must manually update to version 7.13. latesthackingnews.com+5Cyber Security News+5Security Affairs+5
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Exchange Server Vulnerabilities Enable Spoofing & Tampering — Critical flaws in Microsoft Exchange Server allow attackers to perform network-based spoofing and data tampering. Admins should apply updates immediately. gbhackers.com
Technical Breakdown
GitHub Copilot RCE via Prompt Injection
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Mechanism: A crafted code snippet or comment triggers Copilot into generating and executing unsafe code within IDE (VS Code, JetBrains), without sanitization.
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Risk: Full takeover of developer environments—compromised credentials, poisoned code commits, or lateral network pivoting.
WinRAR Zero-Day (CVE-2025-8088)
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Exploit vector: Malicious RAR archives can perform directory traversal, copying malware into autorun locations, executing on reboot.
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Actors: RomCom (Storm-0978) used spear-phishing to infiltrate governmental, NGO, and defense systems across Europe and North America.
Exchange Spoofing/Tampering Flaws
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Impact: Attackers may impersonate internal users, manipulate mail flow, or inject malicious content—undermining trust and integrity.
Strategic Recommendations
| Threat | Immediate Actions |
|---|---|
| Copilot RCE | Disable or restrict Copilot in IDEs; sanitize all generated code; enforce sandboxing; patch to latest versions. |
| WinRAR Zero-Day | Manually update to WinRAR 7.13; filter .rar files at perimeter; sandbox archive previews; bolster phishing training. |
| Exchange Flaws | Apply Microsoft’s Exchange Server security update; restrict internal spoofing sources; monitor logs for mail flow anomalies. |
Final Word from the Founder
As AI tools like Copilot enter development workflows, they bring new and unique risks—prompt injection isn’t just theoretical; it’s dangerous. Meanwhile, legacy tools like WinRAR remain high-value attack surfaces. At CyberDudeBivash, we help defenders stay vigilant, respond swiftly, and integrate AI-resilient security strategies—without slowing down innovation.
Stay secure, stay smart.
— Bivash, Founder & Cybersec + AI Expert, CyberDudeBivash