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Dell PowerProtect Data Domain EUVDEUVD-2026-111842

| CVE-2026-86396 HIGH
OS Command Injection (CWE-78)
2026-10-28 security_alert@emc.com GHSA-c775-7vw5-fpm9
8.8
CVSS 3.1 · Vendor: emc
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Attack ChainAIDerived

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

  1. Access
    Obtain low-privileged remote account
  2. Delivery
    Send input with shell metacharacters
  3. Exploit
    Bypass OS command neutralization
  4. Execution
    Execute arbitrary commands on appliance
  5. Impact
    Compromise backup data and system

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization OS command sanitization, avoid shell exec
MITRE ATT&CK

2 techniques across 1 tactic: Execution

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

Exploitation Conditions

Exploitation requires an authenticated, low-privileged account (CVSS PR:L; the description states 'a low privileged attacker') with remote network access to the appliance (AV:N), and no user interaction (UI:N). The specific product feature, management interface, protocol, or command-processing function that accepts the unneutralized input is not described in the available sources, so defenders cannot scope exploitation to a particular setting or SAPI from this data. The principal limiting factor is the credential prerequisite: an attacker must already possess valid low-level access to the Data Domain system, so unauthenticated internet exposure alone is not sufficient. Affected deployments 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; the fixed versions are not provided in the supplied reference metadata and should be confirmed against Dell DSA-2026-416.

Impact

This is a credible, prioritize-this-week issue rather than a theoretical high-CVSS flaw, but the available signals are thin and partly missing. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N) describes a low-complexity, network-reachable OS command injection requiring only low privileges and no user interaction, with full High impact to confidentiality, integrity, and availability (C:H/I:H/A:H) - on a backup/storage appliance that holds an organization's recovery data, that impact profile is severe because compromise undermines the very system defenders rely on after an incident. However, several decision signals present in a full triage are absent here: no EPSS exploitation-probability score is provided, the vulnerability is NOT listed in CISA KEV, and no POC or exploit reference appears in the input. The vuln.today decision label is 'this_week', which is an elevated-but-not-emergency priority consistent with a serious authenticated flaw lacking confirmed active exploitation. There is no conflict between the CVSS network vector and the description - the description explicitly states 'remote access' and 'low privileged attacker', matching AV:N and PR:L - so the authentication requirement (authenticated, low-privilege) is confirmed. The key limiting factor is that exploitation requires existing low-privileged credentials on the appliance, which bounds the realistic attacker set to insiders or anyone who has already obtained valid low-level access.

Exploit ScenarioDerived

An attacker who already holds low-privileged, remotely-reachable credentials on a Dell PowerProtect Data Domain appliance submits input containing unneutralized shell metacharacters to an affected interface, causing the appliance to execute attacker-chosen OS commands. Because the appliance is a backup/recovery platform, resulting command execution could expose or tamper with stored backup data and the appliance itself. No public exploit identified at time of analysis, and the exact injectable feature is not described in the available sources.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 2.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 28, 2026

OS command injection in 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) lets a low-privileged, authenticated remote attacker execute arbitrary operating system commands on the appliance, with high confidentiality, integrity and availability impact. The credential prerequisite is the main limiting factor: an attacker must already hold valid low-level access to the Data Domain system, so unauthenticated internet exposure alone is not sufficient. No public exploit code or CISA KEV confirmation was present in the available sources at time of analysis, and the reference metadata did not supply a fixed version or EPSS score; the priority label is this_week, and the risk is credible but rests on thin signals.

RemediationAI

Apply the Dell fixed build for your release train as documented in DSA-2026-416 (https://www.dell.com/support/kbdoc/en-us/000515178/dsa-2026-416-security-update-for-dell-powerprotect-data-domain-multiple-vulnerabilities); the supplied reference metadata did not list exact fixed version numbers, so confirm the target build per train against that advisory before upgrading, especially the LTS2024, LTS2025 and LTS2026 branches where each range has a distinct upper bound. Note that updating is the primary and complete fix described for this issue. As a compensating control given the PR:L prerequisite, restrict remote management access to the appliance to trusted administrative networks and remove or disable unnecessary low-privileged accounts, accepting that this reduces exposure surface only and does not remediate the underlying command injection, and that restricting management-plane access will also block legitimate remote administration workflows. The available sources do not describe which interface or feature carries the vulnerable input, so no narrower feature-level workaround can be recommended from this data. The priority label is this_week; no CISA KEV active-exploitation confirmation and no public exploit code were present in the supplied data.

Affected VersionsENISA

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

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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

Technical ContextAI · show details

The flaw is CWE-78, improper neutralization of special elements used in an OS command, in Dell PowerProtect Data Domain appliance software. Per the assessed CVSS 3.1 vector AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, the vulnerable component accepts remotely supplied input that reaches an OS command construction point without adequate neutralization, allowing an authenticated low-privileged user to inject command syntax and have it interpreted by the underlying appliance shell. Because the vector is scope-unchanged, the commands execute within the appliance's own security context rather than crossing a privilege boundary into another component, but the impact is rated high on all three pillars, meaning an attacker with only low-level access can plausibly reach configuration, credential and data material and disrupt backup/data-domain services. The specific feature, management interface, protocol or command-processing function that accepts the unneutralized input is not described in the available sources, so exploitation cannot be scoped to a particular setting or SAPI from this data. Affected builds map to 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.

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Severity by source

Vendor (emc) PRIMARY 8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 8.8 HIGH

Description confirms remote low-privileged attacker (AV:N, PR:L) with no interaction (UI:N); OS command injection yields full command execution, so C:H/I:H/A:H on the appliance itself (S:U).

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

Primary rating from Vendor (emc).

CVSS VectorVendor: emc

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

Lifecycle Timeline

2
Patch available
Oct 28, 2026 - 10:16 EUVD
CVE Published
Oct 28, 2026 - 09:17 cve.org
HIGH 8.8

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 Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability. A low privileged attacker with remote access could potentially exploit this vulnerability, leading to command execution.

Executive ViewAI

Why It Matters

Dell PowerProtect Data Domain appliances are exposed to a high-severity OS command injection flaw (CVE-2026-86396) that allows an attacker with low-level access to execute arbitrary commands, potentially compromising backup data integrity and availability. Leadership should care because this affects core data protection infrastructure, and while exploitation requires valid credentials, insider threats or compromised accounts could lead to significant operational disruption and data loss.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations include restricting network access to Data Domain management interfaces to authorized administrators only, enforcing least privilege and multifactor authentication for all accounts, and implementing robust monitoring and alerting for anomalous command execution or privilege escalation attempts.

Threat Intelligence Overview

EPSS Score
2.2%
Top 18% exploitable
Prevalence
Medium
common enterprise backup/storage appliance, not universally deployed
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 HIGH
CISA KEV No
Public POC No
EPSS 2.2%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
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
No
Human Impact
High

Priority Score

46
Low Medium High Critical
KEV: 0
EPSS: +2
CVSS: +44
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

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