CVE-2026-114105 cthackers CVE debrief

Who should care

Defenders responsible for systems using the adm-zip library, particularly those using versions before 0.6.1, should assess their exposure and prioritize remediation. This includes reviewing their inventory of systems and applications that use adm-zip, verifying the version in use, and upgrading to version 0.6.1 or later.

Why it matters

CVE-2026-114105 is a medium-severity vulnerability in adm-zip that allows attackers to set elevated permissions on extracted files. Defenders should prioritize verifying the version of adm-zip in use and upgrading to version 0.6.1 or later. They should also review their systems for any extracted files with elevated permissions and remediate as necessary. The vulnerability requires verification of affected scope and remediation priority from official sources.

• Potential privilege escalation if an attacker can craft malicious zip files
• Possible elevated privileges for attacker-controlled executables
• Need to verify adm-zip version and review system configurations
• Remediation priority for systems using affected versions

Technical summary

The adm-zip library before version 0.6.1 contains an incorrect permission assignment vulnerability. When the keepOriginalPermission option is enabled, attackers can craft zip external file attributes that pass unmasked into chmod, allowing attacker-controlled executables to gain elevated privileges when extracted as root and later run. This vulnerability requires verification of affected scope and remediation priority from official sources. Defenders should prioritize verifying the version of adm-zip in use and upgrading to version 0.6.1 or later. They should also review their systems for any extracted files with elevated permissions and remediate as necessary.

Defensive priority

Defenders should prioritize verifying the version of adm-zip in use and upgrading to version 0.6.1 or later. They should also review their systems for any extracted files with elevated permissions and remediate as necessary.

Recommended defensive actions

• Verify the version of adm-zip in use and upgrade to version 0.6.1 or later
• Review systems for any extracted files with elevated permissions and remediate as necessary
• Monitor for any suspicious activity related to zip file extraction
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance

Evidence notes

The CVE record and source item provide details on the vulnerability, including its description, CVSS score, and affected versions. However, there is limited information on the number of affected systems or the extent of exploitation.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.