Dell RecoverPoint CVSS 10.0 Under Active Exploitation — Your DR Infrastructure Is the Target
The Threat
CVE-2026-22769 is a hardcoded admin credential in Dell RecoverPoint's Apache Tomcat configuration, located at /home/kos/tomcat9/tomcat-users.xml. It enables unauthenticated WAR file deployment via /manager/text/deploy, yielding root-level code execution. The CVSS 10.0 score is earned: no authentication required, no user interaction, complete system compromise.
Mandiant and Google's GTIG documented active exploitation by UNC6201, who deploy the GRIMBOLT backdoor — a successor to BRICKSTORM compiled with native AOT to strip CIL metadata, making reverse engineering significantly harder. Post-exploitation is sophisticated: persistence via hijacking convert_hosts.sh (executed at boot via rc.local), lateral movement through Ghost NICs (phantom virtual network interfaces on VMs), and iptables-based Single Packet Authorization on compromised vCenter appliances.
Once UNC6201 is in your disaster recovery infrastructure, they pivot silently through your entire VMware environment — and your EDR won't see it coming on port 9389 either.
The Compounding EDR Blind Spot
Simultaneously, ADWSDomainDump — a publicly available tool — enumerates Active Directory via ADWS (port 9389) instead of LDAP, bypassing both Microsoft Defender for Endpoint and CrowdStrike Falcon. Any attacker with domain credentials can silently map your entire AD topology. This means even if you detect GRIMBOLT's initial foothold, the attacker's reconnaissance phase may be invisible to your two most common EDR platforms.
| Indicator | Detail | Detection Action |
|---|---|---|
| CVE-2026-22769 | Hardcoded admin cred in Tomcat config | Patch immediately; verify tomcat-users.xml |
| Exploitation log | /home/kos/auditlog/fapi_cl_audit_log.log | Search for requests to /manager |
| Persistence | convert_hosts.sh modified, runs via rc.local | Hash comparison against known-good |
| GRIMBOLT | Native AOT C# backdoor, no CIL metadata | Deploy Mandiant YARA rules |
| Lateral movement | Ghost NICs + iptables SPA on vCenter | Audit vNIC inventory, iptables on vCenter |
| AD enumeration | ADWS on port 9389, bypasses EDR | Deploy network monitoring on port 9389 |
Why This Matters More Than a Typical CVE
Disaster recovery infrastructure is the last line of defense in a ransomware scenario. If UNC6201 compromises your RecoverPoint environment, they own your backups. Combined with the ADWS blind spot, an attacker can map your AD, compromise your DR, and establish persistent C2 — all while your EDR reports clean.
What to do
Patch Dell RecoverPoint for Virtual Machines against CVE-2026-22769 and audit fapi_cl_audit_log.log for /manager requests immediately
Deploy Mandiant's published YARA rules for GRIMBOLT and sweep VMware environments for Ghost NICs and anomalous iptables rules on vCenter by end of day
Deploy network monitoring and custom detection rules for ADWS traffic on port 9389 by end of week
Verify convert_hosts.sh integrity via hash comparison against known-good baselines on all RecoverPoint appliances by end of day