CVE-2026-74774 in PowerProtect One
Summary
by MITRE • 08/26/2026
Dell PowerProtect One, versions 20.1.0.0 and below, contain an Improper Certificate Validation vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to Protection mechanism bypass.
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Analysis
by VulDB Data Team • 08/26/2026
The identified security flaw resides within Dell PowerProtect One software, specifically affecting version 20.1.0.0 and all preceding releases. This vulnerability is classified as an Improper Certificate Validation issue, which fundamentally undermines the integrity of secure communications established between clients and the application server. In modern distributed systems, particularly those handling sensitive data protection tasks like backup and recovery services, Transport Layer Security or similar encryption protocols are critical for ensuring confidentiality and authenticity. The failure to properly validate digital certificates during these handshake processes creates a significant security gap that attackers can leverage to intercept, modify, or impersonate communications without detection by the underlying cryptographic mechanisms.
From a technical perspective, improper certificate validation typically involves failing to verify the signature of the server's certificate against trusted root authorities, neglecting to check if the certificate has expired, ignoring hostname mismatches between the domain name and the Common Name in the certificate, or disregarding revocation status checks such as Certificate Revocation Lists. When these validations are skipped or implemented incorrectly, the client application accepts any presented certificate as valid, regardless of its origin or authenticity. This effectively neutralizes the primary defense mechanism against man-in-the-middle attacks, allowing an unauthenticated attacker positioned on the network path to intercept traffic and potentially inject malicious payloads or exfiltrate sensitive data stored within the PowerProtect One environment.
The operational impact of this vulnerability is severe due to the nature of Dell PowerProtect One as a critical infrastructure component for enterprise data protection. An unauthenticated remote attacker can exploit this flaw to bypass authentication mechanisms that rely on secure channel establishment, potentially gaining unauthorized access to administrative interfaces or sensitive backup repositories. This leads directly to a Protection mechanism bypass, where security controls designed to restrict access based on identity are rendered ineffective because the system cannot reliably distinguish between legitimate users and malicious actors impersonating them through forged certificates. Consequently, this could result in data leakage, integrity compromise of backed-up assets, or complete takeover of the management plane if further exploitation vectors exist within the application logic that trusts these compromised connections.
This vulnerability aligns with Common Weakness Enumeration identifier CWE-295, which describes Improper Certificate Validation, and is closely related to CWE-347 regarding Improper Verification of Cryptographic Signature. In terms of offensive security frameworks, this flaw facilitates techniques associated with MITM (Man-in-the-Middle) attacks under the ATT&CK tactic of Credential Access or Defense Evasion, specifically by allowing attackers to bypass authentication mechanisms without needing valid credentials initially. The ability to impersonate a trusted server enables subsequent phases such as Session Hijacking or Data Exfiltration if the attacker can successfully intercept and decrypt traffic that was assumed to be secure.
Mitigation strategies must prioritize immediate software remediation. Dell has likely released patches addressing this certificate validation logic in versions newer than 20.1.0.0, so upgrading to a supported version is the primary corrective action. Until an upgrade is feasible, organizations should implement network-level controls such as strict firewall rules that restrict access to PowerProtect One management interfaces only from known, trusted IP addresses or internal subnets. Additionally, deploying intrusion detection systems capable of identifying anomalous TLS handshake patterns may provide some level of monitoring for exploitation attempts. It is also advisable to review certificate pinning implementations if applicable within the client applications connecting to this service, ensuring that they enforce strict validation policies rather than relying solely on server-side configurations which have been found deficient in these older versions.