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Exploited vulnerability · CISA KEV

Is CVE-2026-8398 exploited? Yes: in CISA KEV since 27 May 2026

Gociux · Daemon Tools Lite · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2026-8398, Daemon Tools Lite Embedded Malicious Code Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 27 May 2026, 12 days after it was published. It affects Daemon Tools Lite. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 27 May 2026
ransomwareNot knownno confirmed use
EPSSbelow top 10%lower predicted activity right now (it is still confirmed exploited)
severity9.8CVSS 3.1 · critical
US federal due30 May 2026BOD 22-01 deadline

What it is

Daemon Tools contains an unspecified vulnerability that has a high impact on confidentiality, integrity, and availability.

VendorDaemon (1 exploited CVE in KEV)
ProductDaemon Tools Lite
VulnerabilityDaemon Tools Lite Embedded Malicious Code Vulnerability
WeaknessCWE-506
Published15 May 2026
Added to KEV27 May 2026
Reported by (CNA)Kaspersky

What to do

  1. Check whether you run it. Look for Daemon Tools Lite in your asset inventory, including appliances and cloud images. Stack check lists every exploited Daemon CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 15 May 2026.
  4. Get told next time. Email alerts when CISA adds a CVE for Daemon.

References

Questions

Is CVE-2026-8398 being exploited?

Yes. CISA added CVE-2026-8398 to the Known Exploited Vulnerabilities catalog on 27 May 2026, which means there is reliable evidence of exploitation in the wild.

Is CVE-2026-8398 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2026-8398?

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Check Daemon's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Daemon Tools Lite and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in May 2026 · act-now radar.

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