# Meltdown and Spectre Attack

**MITRE ATTACK layer:** Privilege Escalation

Meltdown and Spectre are hardware vulnerabilities in modern CPUs that exploit speculative execution and out-of-order processing to break memory isolation between applications and operating systems, leaking privileged data across security boundaries.

## How is Meltdown and Spectre Attack abused

Attackers trigger speculative execution paths that access protected memory, then use side-channel timing measurements like cache timing analysis to infer and extract sensitive data that processors should keep isolated and inaccessible.

## Why Meltdown and Spectre Attack matters

These exploits undermine hardware-enforced isolation, allowing unauthorized programs to read passwords, encryption keys, and confidential information across running processes, virtual machines, and cloud environments without triggering traditional security defenses.

## Real-world example

### In 2025, researchers demonstrated "VMScape" (CVE-2025-40300), a Spectre-style side-channel attack targeting AMD and Intel CPUs in virtualized cloud environments, enabling malicious guest VMs to leak host memory secrets including encryption keys.

[Source](https://www.theregister.com/2025/09/11/vmscape_spectre_vulnerability/?)

## Related topics

### Zero-Day Exploit

**Privilege Escalation**

[Read more](https://www.manageengine.com/products/desktop-central/attack-glossary/zero-day-exploit.html)

### Privileged User Compromise

**Privilege Escalation**

[Read more](https://www.manageengine.com/products/desktop-central/attack-glossary/privileged-user-compromise.html)

### Insider Threat

**Privilege Escalation**

[Read more](https://www.manageengine.com/products/desktop-central/attack-glossary/insider-threat.html)

## Additional Resources

### Achieve 442% ROI and reduce patching time by 95% — Forrester TEI Report

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[Read more](https://www.manageengine.com/products/desktop-central/malware-protection-av-comparatives-dec2025.html?utm_source=ec-attack_glossary)

### Simplify endpoint security and build cyber resilience — Endpoint Security For Dummies

Get a clear, practical guide to understanding threats and strengthening your organization’s security.

[Read more](https://www.manageengine.com/products/desktop-central/endpoint-security-for-dummies.html?utm_source=ec_attack-glossary)