Tenable Identity Exposure: Command injection in AD Events Listener
Summary
The Active Directory Events Listener of Tenable Identity Exposure (SaaS) contains a command injection flaw (CWE-78). An authenticated attacker with a low-privileged account can execute arbitrary commands as SYSTEM on the PDC emulator, which can lead to full domain compromise. Exploitation requires a valid domain account and access to the listener's input path; the sources do not describe internet exposure of the listener.
Affected
- Tenable Identity Exposure (SaaS) versions before 3.126.0 (CVE record: 0 to < 3.126.0)
- Tenable advisory lists 3.125.0 and earlier
- Unknown: exact listener build numbers within the affected range
Fixed in
- Tenable Identity Exposure (SaaS) 3.126.0 and later
- Existing listener installations must run Register-TenableIOA.ps1 -Uninstall and reinstall the listener after the upgrade
Workaround
- No vendor-issued workaround known.
- Generic third-party suggestions: restrict access to the listener and monitor for unexpected command execution. These are not Tenable guidance.
Exploitation
- No known exploitation in the wild reported.
- CISA SSVC: exploitation none, automatable no.
- Not listed in CISA KEV at the time of research.
- No public proof of concept found.
- EPSS about 0.02 at the time of retrieval.
Our recommendation
- Treat as high priority if the listener is in use.
- Upgrade to Tenable Identity Exposure 3.126.0 (SaaS).
- Run Register-TenableIOA.ps1 -Uninstall, then reinstall the listener, and verify the listener version afterwards.
- Review which low-privileged domain accounts can reach the listener and restrict them.
- Monitor domain controllers for unexpected command execution as SYSTEM.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Tenable Security Advisory TNS-2026-27 www.tenable.com
- Tenable Identity Exposure SaaS 2026 release notes docs.tenable.com
- Rapid7 vulnerability entry CVE-2026-106126 www.rapid7.com
- CVEfeed entry CVE-2026-106126 cvefeed.io
- Strix CVE entry CVE-2026-106126 www.strix.ai
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 31 Oct 2026, 00:10.
Original description (NVD)
A command injection vulnerability in the Active Directory Events Listener of Tenable Identity Exposure (SaaS) allows an authenticated, low-privileged attacker to execute arbitrary commands as SYSTEM on the PDCe.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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