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Authentication bypass in Dell PowerProtect Data Domain RestAPI

IdentifiersCVE-2025-43727CWE-303· Incorrect Implementation of…

CVE-2025-43727 is an authentication bypass vulnerability in the RestAPI component of Dell PowerProtect Data Domain running Data Domain Operating System (DD OS). According to the provided content, the flaw is caused by an incorrect implementation of authentication algorithms, resulting in improper validation of authentication material in the API layer. An unauthenticated remote attacker can send crafted API requests to bypass authentication checks and gain unauthorized access. Affected versions are DD OS Feature Release 7.7.1.0 through 8.1.0.10, LTS2024 7.13.1.0 through 7.13.1.25, and LTS2023 7.10.1.0 through 7.10.1.50.

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ANALYST BRIEF

Impact, mitigation & remediation

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Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can allow unauthorized access to Dell PowerProtect Data Domain systems without valid credentials. Based on the provided content, this may expose sensitive backup data and management interfaces in enterprise backup and disaster recovery environments. Because the issue affects a management API on backup infrastructure, exploitation could compromise confidentiality of protected data and administrative control surfaces.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure of the vulnerable RestAPI by restricting network access to trusted administrative hosts and management networks only. Disable or isolate external access to the API where operationally feasible, and apply network segmentation and access controls to limit unauthenticated remote reachability. The provided content does not specify any vendor-supplied workaround beyond upgrading.

Remediation

Patch, then assume compromise.

Dell Technologies released security updates for the affected DD OS branches. The provided content states that customers should upgrade to DD OS 8.3.0.10 or later, 7.13.1.30 or later, and 7.10.1.60 or later, as applicable. Dell also advises consulting the Data Domain Compatibility Matrix and its published upgrade guidance for Data Domain and DDVE before performing upgrades.
PUBLIC EXPLOITS

Exploits

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VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

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VendorProductType
Dell TechnologiesData Domain Operating Systemoperating_system

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Threat actor evidence

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Associated malware

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Detection signatures

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Vendor-by-vendor mapping

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Social activity1

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