CVE-2022-41340Public exploitNetwork attack vector

Signature forgery via zero-value ECDSA parameters

Published Sep 24, 2022 · Updated May 22, 2025

Improper ECDSA signature verification in @lionello/secp256k1-js before 1.1.0 allows remote attackers to forge signatures. The ecverify function accepts zero for both r and s, causing a crafted (0, 0) signature to pass verification for arbitrary messages. Any application that submits attacker-controlled signatures to this function can accept unauthentic data as valid without privileges or user interaction.

CVSS severity7.5
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper ECDSA signature verification in @lionello/secp256k1-js before 1.1.0 allows remote attackers to forge signatures. The ecverify function accepts zero for both r and s, causing a crafted (0, 0) signature to pass verification for arbitrary messages. Any application that submits attacker-controlled signatures to this function can accept unauthentic data as valid without privileges or user interaction.

The record

CVE
CVE-2022-41340
Published
Sep 24, 2022
Updated
May 22, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-347
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 24, 2022CVE publishedPublication date reported by the CVE source.
  2. May 22, 2025Record 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

7.5National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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-347Improper Verification of Cryptographic Signature

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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