CVE-2026-21437Public exploit

Untracked file installation via undeclared archive entries

Published Jan 1, 2026 · Updated Jan 1, 2026

Package file-list integrity bypass in Solus eopkg before 4.4.0 allows attackers to install untracked files via a crafted package. The archive extractor wrote entries absent from the package's declared file list, so the package database and lseopkg omitted them and removal left them behind. Exploitation requires a user to install a package from a malicious or compromised source; packages from Solus repositories are not affected.

CVSS severity2.0
Low
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Package file-list integrity bypass in Solus eopkg before 4.4.0 allows attackers to install untracked files via a crafted package. The archive extractor wrote entries absent from the package's declared file list, so the package database and lseopkg omitted them and removal left them behind. Exploitation requires a user to install a package from a malicious or compromised source; packages from Solus repositories are not affected.

The record

CVE
CVE-2026-21437
Published
Jan 1, 2026
Updated
Jan 1, 2026
Vendor
Solus
Product
eopkg
Classifications
CWE-353, T1195.002
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jan 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 1, 2026Record 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=< 4.4.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Solus · eopkgversion=< 4.4.0

Published CVSS scores

2.0GitHubCVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:H
5.5NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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.

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 exploitPublished

Weakness, pattern, technique

CWE-353Missing Support for Integrity Check
T1195.002Compromise Software Supply Chain

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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