Allows authenticated low-privileged attacker to run commands as SYSTEM on the PDCe (domain controller), enabling full domain compromise; Tenable is widely used in enterprise environments.
CVE-2026-106126
Auth command injection in Tenable Identity Exposure enables SYSTEM on PDCe.
Is CVE-2026-106126 being exploited?
Not confirmed. CVE-2026-106126 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 1.9% probability of exploitation in the next 30 days.
How severe is CVE-2026-106126?
CVE-2026-106126 is rated Critical with a CVSS score of 9.4. 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-2026-106126?
Not known from our data. No patch reference has been recorded for CVE-2026-106126, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-106126 affect?
CVE-2026-106126 affects Tenable Identity Exposure (SaaS) - Active Directory Events Listener, Windows Primary Domain Controller Emulator (PDCe) / Active Directory. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-106126?
Isolate the AD Events Listener, follow vendor advisory, apply patch when released, rotate AD/PDC creds and audit logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated low-privileged attacker can execute arbitrary commands as SYSTEM on the PDCe, enabling domain takeover, credential theft, and lateral movement.
Immediate action required
- affected< 3.126.0
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.