--- title: "CVE-2026-86378: Dell PowerProtect Data Domain - Buffer Overflow" description: "Dell PowerProtect Data Domain 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, and LTS2026 8.6.1.0 through 8.6.1.20 contain a stack-based buffer overflow caused by improper bounds checking, letting low privileged remote attackers gain unauthorized access, exploit requires remote access with low privileges." url: https://panop.io/threat-heartbeat/CVE-2026-86378/ --- # CVE-2026-86378 Dell PowerProtect Data Domain - Buffer Overflow Dell PowerProtect Data Domain 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, and LTS2026 8.6.1.0 through 8.6.1.20 contain a stack-based buffer overflow caused by improper bounds checking, letting low privileged remote attackers gain unauthorized access, exploit requires remote access with low privileges. CVSS base score 8.8 /10 High CISA KEV Not listed Public exploit None known Authentication Required [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-86378) ## Details Type Buffer Overflow Impact Privilege Escalation CVSS vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Published 28 October 2026 Updated 29 October 2026 Weakness [CWE-121](https://cwe.mitre.org/data/definitions/121.html) ## Vendor fix Update to the latest available version beyond 8.8 or respective LTS versions. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-86378](https://nvd.nist.gov/vuln/detail/CVE-2026-86378) - [https://www.dell.com/support/kbdoc/en-us/000515178/dsa-2026-416-security-update-for-dell-powerprotect-data-domain-multiple-vulnerabilities](https://www.dell.com/support/kbdoc/en-us/000515178/dsa-2026-416-security-update-for-dell-powerprotect-data-domain-multiple-vulnerabilities) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)