CVE-2026-86378: Dell PowerProtect Data Domain stack buffer overflow
CVE-2026-86378 · Severity: high · CVSS 8.8 · Published 2026-10-28
Dell PowerProtect Data Domain is a backup and recovery appliance used by organizations to protect critical data. This vulnerability allows an attacker with remote access to trigger a stack buffer overflow, potentially leading to command execution and complete system compromise.
No. Junglewise Threat Intelligence has no report of CVE-2026-86378 being exploited in the wild.
How severe is CVE-2026-86378?
High severity, with a CVSS score of 8.8, published 28 October 2026.
Which products and versions are affected?
Dell PowerProtect Data Domain Feature Release 7.7.1.0 through 8.8, LTS2024 7.13.1.0 through 7.13.1.80, LTS2025 8.3.1.0 through 8.3.1.40, LTS2026 8.6.1.0 through 8.6.1.20.
Is there a fix for CVE-2026-86378?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-86378 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-86378?
Check whether you run Dell PowerProtect Data Domain at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
Dell PowerProtect Data Domain Feature Release 7.7.1.0 through 8.8, LTS2024 7.13.1.0 through 7.13.1.80, LTS2025 8.3.1.0 through 8.3.1.40, LTS2026 8.6.1.0 through 8.6.1.20