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Dell PowerProtect Data Domain EUVDEUVD-2026-111853

| CVE-2026-86388 MEDIUM
Path Traversal (CWE-22)
2026-10-28 dell GHSA-wm8q-v98m-x5w8
5.3
CVSS 3.1 · Vendor: dell
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Reach exposed Data Domain network interface
  2. Delivery
    Send request with path-traversal sequences
  3. Exploit
    Escape restricted directory
  4. Execution
    Read files outside intended path
  5. Impact
    Disclose sensitive filesystem contents

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling Path canonicalization, traversal prevention
MITRE ATT&CK

2 techniques across 2 tactics: Discovery, Collection

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Per the supplied CVSS vector (AV:N/AC:L/PR:N/UI:N), exploitation requires only remote network access to the PowerProtect Data Domain management/service interface with no authentication and no user interaction. The specific triggering feature, protocol endpoint, or parameter is not described in the available sources, so the exact request path cannot be named. Limiting factors: impact is confined to confidentiality at Low (C:L) - read-level filesystem access only, with no write/integrity or availability impact - and exploitation presupposes that the appliance's network interface is reachable by the attacker, so appliances isolated on a management network are correspondingly harder to reach.

Impact

Signals are consistent but point to a moderate, not critical, issue. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N, base 5.3) describes a network-reachable, low-complexity, unauthenticated flaw whose only impact is low-confidentiality (C:L) - read-level filesystem access with no integrity or availability impact. The vuln.today decision label is 'this_month' (not act_now/emergency), which aligns with a patch-available, limited-impact bug rather than an urgent crisis. There is no CISA KEV listing and no EPSS score supplied, so there is no evidence of active exploitation or a measured exploitation probability; this is not confirmed actively exploited. No public exploit or PoC reference is present in the input. The main thing elevating attention is the unauthenticated, remote nature against a widely-deployed backup appliance - a path-traversal read on a data-protection system could expose sensitive configuration or stored data. Net: a genuine but contained priority - patch on a normal (this_month) cadence, not an emergency. Note the input provides no EPSS value, so probabilistic exploitation likelihood cannot be assessed from the data.

Exploit ScenarioDerived

A remote, unauthenticated attacker sends a crafted request to a network-exposed PowerProtect Data Domain interface containing directory-traversal sequences that escape the intended restricted directory, causing the appliance to disclose the contents of files outside that directory. Because the CVSS confidentiality impact is only Low (C:L) with no integrity or availability impact, the realistic outcome is unauthorized reading of files rather than modification or code execution. No public exploit or PoC was identified at time of analysis.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 28, 2026

An unauthenticated path traversal flaw (CWE-22) in Dell PowerProtect Data Domain affects 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, allowing a remote attacker to read files outside the intended restricted directory. Per the supplied CVSS vector (AV:N/AC:L/PR:N/UI:N) no authentication or user interaction is required, but the impact is limited to low-level confidentiality only - read access with no integrity or availability effect. No public exploit code or confirmed active exploitation is identified in the available data, and the priority decision is 'this_month' rather than immediate action.

RemediationAI

Dell has released fixes; upgrade each branch to at least the corresponding fixed build: LTS2024 to 7.13.1.90 or later, LTS2025 to 8.3.1.50 or later, LTS2026 to 8.6.1.30 or later, and the Feature Release train to 8.9.0.0 or later (systems on 7.7.1.0 through 8.8 must move to a supported fixed release). Consult Dell advisory DSA-2026-416 at https://www.dell.com/support/kbdoc/en-us/000515178/dsa-2026-416-security-update-for-dell-powerprotect-data-domain-multiple-vulnerabilities for the exact update procedure and any branch-specific guidance. Because exploitation requires network reachability to the appliance's management/service interface with no authentication, limiting that exposure - restricting which networks can reach the appliance interface - reduces the attack surface while upgrades are scheduled; the available sources do not describe any further vendor-specific workaround or its side effects.

Affected VersionsENISA

PowerProtect Data Domain 0 <8.6.1.30 or later
PowerProtect Data Domain 0 <7.13.1.90 or later
PowerProtect Data Domain 0 <8.9.0.0 or later
PowerProtect Data Domain 0 <8.3.1.50 or later

Affects your stack

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Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The issue is a classic improper limitation of a pathname to a restricted directory (CWE-22, path traversal) in Dell PowerProtect Data Domain, a purpose-built backup and deduplication appliance whose management and service interfaces are exposed over the network. The root cause class is failure to properly canonicalise or constrain user-supplied path input before it is used in filesystem operations, which can let an attacker escape the intended directory. The affected CPE (cpe:2.3:a:dell:powerprotect_data_domain) covers the appliance software across four release trains. Notably, the EUVD affected-version data lists fixed thresholds (8.6.1.30, 7.13.1.90, 8.9.0.0 and 8.3.1.50) that are higher than the ranges quoted in the CVE description, indicating multiple maintained branches each requiring its own update. The specific triggering feature, protocol endpoint or request parameter is not described in the available sources, so the exact request path cannot be named; the CVSS metrics describe severity and prerequisites, not mechanism.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (dell) PRIMARY 5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
vuln.today AI 5.3 MEDIUM

Description states unauthenticated remote attacker (AV:N/PR:N/UI:N) gaining filesystem read access only, so C:L with I:N/A:N and AC:L.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (dell).

CVSS VectorVendor: dell

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

2
Patch available
Oct 28, 2026 - 10:16 EUVD
CVE Published
Oct 28, 2026 - 09:40 cve.org
MEDIUM 5.3

DescriptionCVE.org

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. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to Filesystem access for attacker.

Threat Intelligence Overview

EPSS Score
0.4%
Top 65% exploitable
Prevalence
High
widely-deployed enterprise backup/deduplication appliance in data centers
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.4%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
High

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Path traversal exploits occur when applications use user-controlled input to construct file system paths without proper validation.

CVE-2026-53481 CRITICAL
9.8 Jul 07

Path traversal leading to full system compromise affects Dell PowerProtect Data Domain (DD OS) versions 7.7.1.0 through

CVE-2026-53483 CRITICAL
9.8 Jul 07

Improper authentication in Dell PowerProtect Data Domain (versions 7.7.1.0 through 8.7, plus the LTS2026, LTS2025, and L

CVE-2026-86384 CRITICAL
9.8 Oct 28

Remote, unauthenticated attackers can obtain exposed credentials from Dell PowerProtect Data Domain appliances running F

CVE-2026-26354 CRITICAL
9.8 Apr 22

Stack-based buffer overflow in Dell PowerProtect Data Domain DD OS allows remote unauthenticated attackers to execute ar

CVE-2026-103780 CRITICAL
9.8 Oct 28

Unauthenticated remote command execution is possible on Dell PowerProtect Data Domain appliances running Feature Release

CVE-2026-86400 CRITICAL
9.8 Oct 28

Improper authentication in Dell PowerProtect Data Domain allows remote unauthenticated attackers to bypass authenticatio

CVE-2026-86385 HIGH
8.8 Oct 28

Privilege escalation in Dell PowerProtect Data Domain Feature Release 7.7.1.0 through 8.8 allows an authenticated, low-p

CVE-2025-29987 HIGH
8.8 Apr 03

Dell PowerProtect Data Domain with Data Domain Operating System (DD OS) versions prior to 8.3.0.15 contain an Insufficie

CVE-2026-23776 HIGH
8.8 Apr 17

Improper certificate validation in Dell PowerProtect Data Domain DD OS 7.7.1.0-8.5, 8.3.1.0-8.3.1.20 (LTS2025), and 7.13

CVE-2026-86378 HIGH
8.8 Oct 28

Stack-based buffer overflow in Dell PowerProtect Data Domain allows a low-privileged authenticated remote attacker to po

CVE-2026-86398 HIGH
8.8 Oct 28

Dell PowerProtect Data Domain appliances running Feature Release 7.7.1.0 through 8.8, LTS2024 7.13.1.0 through 7.13.1.80

CVE-2026-23853 HIGH
8.4 Apr 17

Local attackers can gain full system access to Dell PowerProtect Data Domain storage systems without authentication due

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