Unauthenticated RCE (CVSS 10.0) in widely deployed ManageEngine ADAudit Plus; high-impact enterprise product and easy remote compromise.
CVE-2026-6516
Unauthenticated RCE in ManageEngine ADAudit Plus agent API (pre-8606).
Is CVE-2026-6516 being exploited?
Not confirmed. CVE-2026-6516 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 4.9% probability of exploitation in the next 30 days.
How severe is CVE-2026-6516?
CVE-2026-6516 is rated Critical with a CVSS score of 10.0. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-6516?
Yes. A fix has been recorded for CVE-2026-6516. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-6516 affect?
CVE-2026-6516 affects Zoho ManageEngine ADAudit Plus < 8606, ADAudit Plus Agent API, Servers running ADAudit Plus. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-6516?
Upgrade ADAudit Plus to 8606+ immediately; block agent API access and isolate affected hosts until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote code execution via agent API allowing full system command execution, malware deployment, and lateral movement.
Immediate action required
- affected< 8606
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.