CVE-2021-41067Public exploitNetwork attack vector

Malicious update installation via unchecked HTTP packages

Published Dec 14, 2021 · Updated Aug 4, 2024

Update integrity failure in Listary through 6 allows man-in-the-middle attackers to install malicious content via an HTTP update. The /check-update path retrieves update packages over HTTP, and the updater does not validate package integrity before installation. Exploitation requires control of the network path during an update check and user interaction; successful substitution installs attacker-controlled content.

CVSS severity7.5
High
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Update integrity failure in Listary through 6 allows man-in-the-middle attackers to install malicious content via an HTTP update. The /check-update path retrieves update packages over HTTP, and the updater does not validate package integrity before installation. Exploitation requires control of the network path during an update check and user interaction; successful substitution installs attacker-controlled content.

The record

CVE
CVE-2021-41067
Published
Dec 14, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-354, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 14, 2021CVE 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

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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

7.6NIST National Vulnerability DatabaseAV:N/AC:H/Au:N/C:C/I:C/A:C
7.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:H/PR:N/UI:R/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.

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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-354Improper Validation of Integrity Check Value
T1557Adversary-in-the-Middle

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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