As cited
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vulnerabilities
Critical Copilot vulnerability allowed hackers to steal 2FA code from users
Microsoft patched a critical vulnerability in M365 Copilot that allowed attackers to extract two-factor authentication codes and other sensitive data from user emails through prompt injection techniques. Researchers demonstrated that large language models cannot reliably distinguish between legitimate user instructions and malicious directives embedded in third-party content, creating a fundamental security boundary problem. Attackers bypassed Copilot's guardrails by using markup language and HTML tags to trigger unintended web requests that exfiltrated sensitive data to attacker-controlled servers.
Why it matters: If you use Copilot with M365, apply Microsoft's patch immediately to prevent attackers from harvesting authentication codes and credentials from your email.
- Source published
- First seen by Cybersecurity Tracker
Source attribution
Correction
Correction recorded as of .
vulnerabilities
Critical Copilot vulnerability allowed hackers to steal 2FA code from users
Microsoft patched a critical vulnerability in M365 Copilot that allowed attackers to extract two-factor authentication codes and other sensitive data from user emails through prompt injection techniques. Researchers demonstrated that large language models cannot reliably distinguish between legitimate user instructions and malicious directives embedded in third-party content, creating a fundamental security boundary problem. Attackers bypassed Copilot's guardrails by using markup language and HTML tags to trigger unintended web requests that exfiltrated sensitive data to attacker-controlled servers.
Why it matters: If you use Copilot with M365, apply Microsoft's patch immediately to prevent attackers from harvesting authentication codes and credentials from your email.
- Source published
- First seen by Cybersecurity Tracker