CVE-2023-45249

CVE-2023-45249 is an insecure default password flaw (CWE-1393) in Acronis Cyber Infrastructure (ACI) that allows unauthenticated remote command execution with a CVSS 3.1 score of 9.8. An attacker who can reach the exposed service over the network can authenticate with credentials left at vendor defaults and run arbitrary commands, gaining full confidentiality, integrity, and availability impact on the host. Organizations running ACI 5.0, 5.1, 5.2, 5.3, or 5.4 on builds earlier than the fixed builds are affected, particularly deployments where the ACI management interface is internet-facing. The flaw is actively exploited in the wild: it was added to CISA's Known Exploited Vulnerabilities catalog on 2024-07-29 and multiple security outlets reported in-the-wild exploitation, with an EPSS of 53.3% (99th percentile). No public proof-of-concept is known, but exploitation activity has been observed directly.

What to do: Upgrade each affected ACI deployment to the fixed build for its branch: at least 5.0.1-61, 5.1.1-71, 5.2.1-69, 5.3.1-53, or 5.4.4-132 respectively. Immediately change any account or service passwords still set to vendor defaults, and restrict internet exposure of the ACI management interface. Per CISA's KEV required action, apply vendor mitigations (or discontinue use if unavailable), and review logs for signs of unauthorized access or command execution.