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Dell ObjectScale CVE-2026-59909

| EUVDEUVD-2026-60202 HIGH
Path Traversal: '.../...//' (CWE-35)
2026-08-17 security_alert@emc.com GHSA-r6xr-qx9m-cphx
7.1
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 local account
  2. Delivery
    Identify vulnerable file operation input point
  3. Exploit
    Craft path traversal payload with '../' sequences
  4. Execution
    Submit payload to bypass directory restriction
  5. Persist
    Overwrite or corrupt files outside intended scope
  6. Impact
    Achieve data tampering or service disruption

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling Path traversal prevention
Exploitation Conditions

Exploitation requires local access to a system running Dell ObjectScale (AV:L per CVSS) and a low-privileged local account (PR:L per CVSS) - for example, a standard OS user, a restricted service account, or any account capable of interacting with the vulnerable ObjectScale component locally. No user interaction from a victim is required (UI:N). No special non-default configuration is identified in the description as a prerequisite. Factors that limit exploitation include the requirement for physical or remote shell access to the ObjectScale host itself; remote unauthenticated exploitation is not possible based on the local attack vector. Environments that restrict local interactive logins to administrative accounts only significantly reduce exploitability.

Impact

The CVSS 7.1 score reflects a locally exploitable flaw with low access complexity and low privilege requirements, translating to meaningful risk within environments where multiple users or services share the same ObjectScale node. The local attack vector (AV:L) is the primary risk limiter: exploitation cannot be performed remotely without first gaining a foothold, making this most relevant in insider-threat or post-breach lateral-movement scenarios. No EPSS data was provided in the input; without it, exploitation probability cannot be quantified probabilistically. No KEV listing exists, and no POC has been identified, so there is no signal of active exploitation at this time. The I:H and A:H impacts are significant - file tampering at this level could corrupt object metadata, disable storage services, or enable privilege escalation depending on which files are reachable via traversal. Overall, this is a real but bounded risk: high priority for multi-tenant or shared-access ObjectScale deployments, lower urgency for tightly access-controlled single-tenant nodes.

Exploit ScenarioDerived

An attacker with a low-privileged local account on a Dell ObjectScale node - such as a shared service account, a restricted shell user, or an account obtained through credential theft - submits a crafted input containing path traversal sequences (e.g., '../../etc/') to a vulnerable file operation within the ObjectScale software. The traversal bypasses the intended directory scope, allowing the attacker to overwrite or corrupt critical configuration or data files, potentially disrupting object storage services or creating a persistent tampered state.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Aug 17, 2026

Path traversal in Dell ObjectScale (versions prior to 4.3.0.1) enables a local low-privileged attacker to write to or corrupt files outside intended directory boundaries, achieving high integrity and availability impact without requiring user interaction. The CVSS vector (AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H) confirms exploitation requires only a local account with minimal privilege - no elevated rights or user interaction needed. No public exploit code or CISA KEV listing has been identified at time of analysis; risk is primarily from insider threats or attacker-controlled service accounts in post-compromise scenarios.

RemediationAI

Upgrade Dell ObjectScale to version 4.3.0.1 or later, as confirmed by the vendor advisory DSA-2026-328 (https://www.dell.com/support/kbdoc/en-us/000500724/dsa-2026-328-security-update-for-dell-objectscale-multiple-proprietary-code-vulnerabilities). If immediate patching is not feasible, restrict local system access to ObjectScale nodes to only trusted administrative accounts, eliminating the low-privileged local access prerequisite. Enforce the principle of least privilege on all service accounts and user accounts with local access to ObjectScale hosts; removing shell or interactive access for non-administrative roles reduces the attack surface. Audit local file system permissions on the ObjectScale data and configuration directories to ensure that low-privileged processes cannot write to sensitive paths even if a traversal is achieved. Note that these compensating controls do not eliminate the vulnerability - patching to 4.3.0.1 remains the definitive fix.

Affected VersionsENISA

ObjectScale 0 <4.3.0.1 or later

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Technical ContextAI · show details

Dell ObjectScale is an enterprise-grade software-defined object storage platform. CWE-35 (Path Traversal) indicates the software fails to properly neutralize special path elements such as '../' sequences within user-controlled input used in file operations, allowing an attacker to traverse directory boundaries and target files outside the intended working directory. Notably, the CVSS base vector assigns C:N (no confidentiality impact) alongside I:H and A:H, strongly suggesting this traversal primitive enables write or delete operations - overwriting critical configuration, data, or system files - rather than exposing sensitive content for reading. The vulnerability was disclosed under DSA-2026-328, which covers multiple proprietary code vulnerabilities in ObjectScale, indicating it is one of several issues addressed in the 4.3.0.1 release.

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Severity by source

Vendor (emc) PRIMARY 7.1 HIGH
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
vuln.today AI 7.1 HIGH

Local access with a low-privileged account is the stated prerequisite; write-only traversal impact (C:N, I:H, A:H) aligns with file corruption rather than data exposure.

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

Primary rating from Vendor (emc).

CVSS VectorVendor: emc

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

Lifecycle Timeline

2
Patch available
Aug 17, 2026 - 15:19 EUVD
CVE Published
Aug 17, 2026 - 14:20 cve.org
HIGH 7.1

DescriptionCVE.org

Dell ObjectScale, versions prior to 4.3.0.1, contain(s) a Path Traversal vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Information tampering.

Executive ViewAI

Why It Matters

Dell ObjectScale versions prior to 4.3.0.1 contain a path traversal vulnerability allowing locally authenticated accounts to write or corrupt files outside intended directories, creating direct risk to system integrity and availability. In multi-tenant or service account environments, this vulnerability enables both insider threats and post-compromise lateral impact, with no known public exploit currently limiting real-world risk window. Organizations must immediately restrict local access privileges and prepare upgrade plans.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: (1) restrict local system access to ObjectScale installations via OS-level controls and SSH/console restrictions; (2) implement file integrity monitoring on ObjectScale directories to detect unauthorized modifications; (3) apply principle of least privilege to service accounts running ObjectScale components; (4) enforce comprehensive audit logging for local authentication and file access events within ObjectScale paths; (5) conduct access review for all local accounts with ObjectScale system access to identify and remove unnecessary permissions.

Threat Intelligence Overview

EPSS Score
0.1%
Top 98% exploitable
Prevalence
Low
enterprise object storage platform, niche deployment footprint
Data Quality
5 sources
Confidence: Medium

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 0.1%
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
Scheduled
Exploitation
None
System Exposure· derived
Small
Automatable
No
Human Impact
High
Technical Impact
Partial

Priority Score

36
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +36
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.

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