CVE-2020-0561Public exploit

Privilege escalation via poisoned floating-point control state

Published Feb 13, 2020 · Updated Aug 4, 2024

Improper initialization in Intel Software Guard Extensions SDK allows local users to alter enclave floating-point computations. The enclave-entry runtime fails to sanitize inherited x87 FPU and SSE control state, allowing hostile rounding, precision, or exception settings to affect enclave calculations. A local low-privilege user must prime that state before entry; affected floating-point enclaves can then produce attacker-influenced results.

CVSS severity2.5
Low
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper initialization in Intel Software Guard Extensions SDK allows local users to alter enclave floating-point computations. The enclave-entry runtime fails to sanitize inherited x87 FPU and SSE control state, allowing hostile rounding, precision, or exception settings to affect enclave calculations. A local low-privilege user must prime that state before entry; affected floating-point enclaves can then produce attacker-influenced results.

The record

CVE
CVE-2020-0561
Published
Feb 13, 2020
Updated
Aug 4, 2024
Vendor
Intel Corporation
Product
Intel Software Guard Extensions SDK
Classifications
CWE-665, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 13, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=before v2.6.100.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Intel Corporation · Intel Software Guard Extensions SDKversion=before v2.6.100.1

Published CVSS scores

4.6NIST National Vulnerability DatabaseAV:L/AC:L/Au:N/C:P/I:P/A:P
2.5Intel CorporationCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-665Improper Initialization
T1068Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo