CVE-2021-3114Public exploitNetwork attack vector

Incorrect P-224 outputs via faulty field reduction

Published Jan 26, 2021 · Updated Aug 3, 2024

Incorrect calculation in crypto/elliptic in Go before 1.14.14 and Go 1.15.0 through 1.15.6 allows attackers to produce invalid P-224 outputs. The p224Contract final reduction misclassifies one limb boundary and fails to carry a lowest-limb underflow after subtracting the field prime. Exploitation requires an application to invoke P224().ScalarMult() with values reaching rare intermediate states; the bounded consequence is an invalid cryptographic point.

CVSS severity6.5
Medium
EPSS probability2.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect calculation in crypto/elliptic in Go before 1.14.14 and Go 1.15.0 through 1.15.6 allows attackers to produce invalid P-224 outputs. The p224Contract final reduction misclassifies one limb boundary and fails to carry a lowest-limb underflow after subtracting the field prime. Exploitation requires an application to invoke P224().ScalarMult() with values reaching rare intermediate states; the bounded consequence is an invalid cryptographic point.

The record

CVE
CVE-2021-3114
Published
Jan 26, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-682
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-682Incorrect Calculation

Public exploit references

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

Technologies

Your stack

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Your stack

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