CVE-2025-29985: Dell Common Event Enabler Auth Bypass Flaw

CVE-2025-29985 Overview

CVE-2025-29985 affects Dell Common Event Enabler (CEE) version 9.0.0.0, specifically the Common Anti-Virus Agent (CAVA) component. The vulnerability stems from initialization of a resource with an insecure default configuration [CWE-1188]. An unauthenticated attacker with network access can exploit this weakness to gain unauthorized access to the affected system. Dell published security advisory DSA-2025-158 to address the issue. The vulnerability was assigned an EPSS score of 0.262% indicating a low probability of near-term exploitation.

Critical Impact
Unauthenticated remote attackers can exploit insecure default settings in Dell CEE CAVA to gain unauthorized access to confidentiality and integrity boundaries.

Affected Products

Dell Common Event Enabler 9.0.0.0
Common Anti-Virus Agent (CAVA) component
Dell storage integrations relying on CEE 9.0.0.0

Discovery Timeline

2025-04-08 - CVE-2025-29985 published to NVD
2025-04-08 - Dell releases security advisory DSA-2025-158
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-29985

Vulnerability Analysis

The Common Event Enabler is a Dell framework that delivers event notifications between file storage systems and applications such as antivirus scanners, quota managers, and content indexers. The Common Anti-Virus Agent (CAVA) subcomponent handles antivirus scanning requests from Dell storage platforms and forwards them to third-party antivirus servers.

The flaw in CEE 9.0.0.0 originates from an insecure default configuration in CAVA. The component initializes with settings that do not enforce sufficient access controls on network-facing interfaces. This exposes CAVA functionality to remote callers who have not authenticated to the service.

An attacker reaching the CAVA service over the network can interact with it without providing credentials. The result is unauthorized access affecting the confidentiality and integrity of the environment. Availability is not impacted according to the published metrics.

Root Cause

The root cause maps to [CWE-1188] — Initialization of a Resource with an Insecure Default. The CAVA agent ships with default parameters that fail to constrain who can invoke its functionality. Administrators deploying CEE 9.0.0.0 inherit these permissive defaults unless they apply the Dell-supplied update.

Attack Vector

Exploitation requires network reachability to the CAVA endpoint on a host running Dell CEE 9.0.0.0. The attacker does not need credentials, does not need user interaction, and does not require elevated privileges. No public proof-of-concept exploit or CISA KEV listing exists at the time of publication. See the Dell Security Update DSA-2025-158 for vendor-specific exploitation context.

Detection Methods for CVE-2025-29985

Indicators of Compromise

Unexpected inbound connections to CAVA service ports on hosts running Dell CEE 9.0.0.0
Antivirus scan requests originating from systems outside the approved storage fabric
Configuration files in the CEE installation directory retaining vendor-shipped defaults after deployment

Detection Strategies

Inventory all CEE installations and confirm the running version through registry keys or the CEE management console
Compare deployed CAVA configuration files against a hardened baseline that restricts callers to authorized storage arrays
Monitor Windows Event Logs on CEE hosts for CAVA service startup entries and unauthorized reconfiguration events

Monitoring Recommendations

Enable network flow logging on segments hosting CEE and alert on connections from non-storage sources
Track process execution and command-line arguments for the EMCCAVA.exe service on affected hosts
Forward CEE logs to a centralized log platform and build correlation rules for repeated unauthenticated CAVA requests

How to Mitigate CVE-2025-29985

Immediate Actions Required

Apply the update referenced in Dell advisory DSA-2025-158 to all systems running CEE 9.0.0.0
Restrict network access to CAVA service ports so only authorized Dell storage arrays can reach them
Audit CAVA configuration files after patching to confirm defaults have been replaced with hardened values

Patch Information

Dell has released a fixed version of Common Event Enabler that remediates the insecure default in CAVA. Refer to the Dell Security Update DSA-2025-158 for the specific fixed build and upgrade instructions. Test the update in a non-production environment before broad rollout because CEE integrates with production storage antivirus workflows.

Workarounds

Place CEE hosts behind firewall rules that limit CAVA connections to explicit source IP addresses of Dell storage systems
Segment the storage management network so that general-purpose clients cannot reach CEE services
Disable the CAVA agent on CEE installations that do not require antivirus event forwarding until the patch is applied

bash

# Example Windows firewall rule limiting CAVA access to a specific storage array
netsh advfirewall firewall add rule name="Allow CAVA from Storage Array" ^
  dir=in action=allow protocol=TCP localport=12228 ^
  remoteip=10.10.20.5 profile=any

netsh advfirewall firewall add rule name="Block CAVA All Others" ^
  dir=in action=block protocol=TCP localport=12228 profile=any