Microsoft Copilot
1
Incidents
10.0
Avg Severity
1
Critical
0
High
Top Failure Modes
Security Vulnerability
1
Worst Incident
STUPID-2026-0051 10/10EchoLeak: a zero-click email silently exfiltrated data from Microsoft 365 Copilot (CVE-2025-32711, CVSS 9.3)
Unknown Agent
4
Incidents
8.5
Avg Severity
3
Critical
0
High
Top Failure Modes
Security Vulnerability
3
Infinite Loop
1
Worst Incident
STUPID-2026-0022 10/10AI vibe-coded Next.js app pinned vulnerable dependency — cryptominer compromised production server
Comparison Summary
| Metric | Microsoft Copilot | Unknown Agent |
|---|---|---|
| Total Incidents | 1 | 4 |
| Avg Severity | 10.0/10 | 8.5/10 |
| Critical Incidents | 1 | 3 |
| Top Failure Mode | Security Vulnerability | Security Vulnerability |
Frequently Asked Questions
Is Microsoft Copilot or Unknown Agent more reliable?
Based on StupidLLM data, Microsoft Copilot has 1 documented failures (avg severity 10.0/10) while Unknown Agent has 4 (avg severity 8.5/10). Unknown Agent shows better reliability based on average severity scores.
What are the main differences between Microsoft Copilot and Unknown Agent failures?
Microsoft Copilot's most common failure mode is security vulnerability, while Unknown Agent most commonly fails via security vulnerability. Microsoft Copilot has 1 critical incidents vs Unknown Agent's 3.