CVE-2024-1721

Malicious updates via improper signature verification

Published May 21, 2024 · Updated Aug 1, 2024

Improper signature verification in HYPR Passwordless for Windows before 9.1 allows local users to install a malicious software update. HYPR has not identified the update component or disclosed how its signature check accepts an untrusted update package. Exploitation requires high local privileges, a particular condition, and active user interaction; successful abuse replaces trusted client software.

CVSS severity5.6
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper signature verification in HYPR Passwordless for Windows before 9.1 allows local users to install a malicious software update. HYPR has not identified the update component or disclosed how its signature check accepts an untrusted update package. Exploitation requires high local privileges, a particular condition, and active user interaction; successful abuse replaces trusted client software.

The record

CVE
CVE-2024-1721
Published
May 21, 2024
Updated
Aug 1, 2024
Vendor
HYPR
Product
HYPR Passwordless
Classifications
CWE-347, T1195.002
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. May 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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?

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

  1. Affected versionversion=0 <9.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

HYPR · HYPR Passwordlessversion=0 <9.1

Published CVSS scores

5.6HYPR CorpCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:A/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:C/RE:M/U:Green

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

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
T1195.002Compromise Software Supply Chain

Public exploit references

No public exploit references are available in this record.

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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