Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessObtain low-privilege remote access
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DeliverySend crafted network request
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ExploitTrigger out-of-bounds write
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ExecutionCorrupt process memory
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ImpactCrash service and cause denial of service
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, write limits
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Exploitation requires network reachability to Dell PowerProtect Data Domain plus low-privilege authenticated access (CVSS PR:L) - it is NOT unauthenticated. No user interaction is needed (UI:N) and attack complexity is low (AC:L). The appliance must be running an affected release: 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, or LTS2026 8.6.1.0 through 8.6.1.20. The specific feature, protocol, or interface that receives the malformed input is not described in the available sources, so the exact trigger surface cannot be named from this data. The principal limiting factor is the required low-privilege credential/access and the availability-only impact (service disruption rather than data compromise or code execution). |
| Impact | This is a moderate, defensively-prioritized issue rather than an emergency. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H, 7.6) indicates a network-reachable flaw with low attack complexity requiring only low-level authentication (PR:L) and no user interaction, with the dominant impact being high availability loss (A:H) consistent with the Out-of-bounds Write (CWE-787) and its stated Denial of Service outcome. No EPSS score was supplied, so exploitation probability cannot be quantified from the input. The CVE is NOT on CISA KEV and no proof-of-concept or exploit reference is present (only the Dell vendor advisory), so there is no public exploit identified at time of analysis. The vuln.today decision label is 'this_week', signaling a near-term but non-emergency remediation priority - consistent with an authenticated, availability-only impact on an enterprise appliance rather than an unauthenticated remote code execution. The claimed confidentiality and integrity impacts (C:L/I:L) in the vendor vector are not explained by the description, which states only Denial of Service; this minor discrepancy should be verified against the full Dell advisory. |
| Exploit ScenarioDerived | An attacker who already holds low-privilege credentials or access to the Data Domain management/data interface sends crafted input over the network that triggers the out-of-bounds write, corrupting memory and crashing or hanging the service. This disrupts backup and restore operations for the environment relying on the appliance. No public exploit code is known, and some form of authenticated access is required, which raises the bar for opportunistic attacks. |
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Alert meAnalysisAIv1 – Oct 28, 2026
Out-of-bounds write in Dell PowerProtect Data Domain allows a low-privilege authenticated remote attacker to trigger memory corruption and deny service on affected appliances. The exposure spans Feature Release 7.7.1.0 through 8.8 and 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 assessed impact is availability-only (C:N/I:N/A:H); no public exploit was identified at time of analysis, and priority is this_week rather than emergency.
RemediationAI
Apply the Dell PowerProtect Data Domain security update referenced in advisory DSA-2026-416 (https://www.dell.com/support/kbdoc/en-us/000515178/dsa-2026-416-security-update-for-dell-powerprotect-data-domain-multiple-vulnerabilities); patch availability is indicated by the vendor advisory, but no exact fixed build numbers are listed in the supplied data, so the advisory should be used to select the corrected release for each affected branch. Because exploitation requires both network reachability to the appliance and low-privilege authenticated access, interim exposure can be reduced by restricting network access to trusted management and data paths and by removing unnecessary low-privilege accounts; these controls may disrupt legitimate backup, replication, or administrative workflows and are not a substitute for the vendor update.
Affected VersionsENISA
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
CVE-2026-86377 is an out-of-bounds write (CWE-787) in Dell PowerProtect Data Domain appliance software, identified by CPE cpe:2.3:a:dell:powerprotect_data_domain:*:*:*:*:*:*:*:*. This class of memory-corruption bug occurs when software writes data past the end of an allocated buffer, which can crash or destabilize the service; the specific feature, protocol, or interface that receives the malformed input is not described in the available sources, so the exact trigger surface cannot be named from this data. Exploitation requires network reachability to the appliance and low-privilege authenticated access (CVSS PR:L), with low attack complexity and no user interaction; the authoritative assessment scores confidentiality and integrity impact as none and availability as high (C:N/I:N/A:H), consistent with denial of service rather than data compromise or code execution.
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
Network-reachable and low-complexity with required low-privilege auth (PR:L); description states only Denial of Service, so C:N/I:N and A:H, diverging from the vendor's claimed C:L/I:L.
Primary rating from Vendor (dell).
CVSS VectorVendor: dell
Lifecycle Timeline
2DescriptionCVE.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 Out-of-bounds Write vulnerability. A low privileged attacker with remote access could potentially exploit this vulnerability, leading to Denial of service.
Executive ViewAI
Dell PowerProtect Data Domain appliances across multiple supported release trains are affected by a high-severity memory corruption flaw that lets an authenticated low-privilege user crash the system, disrupting backup and recovery operations. Leadership should care because these appliances are critical to data protection and business continuity, and an outage could halt restoration capabilities during an incident.
No vendor-released patch identified at time of analysis; restrict management interface access to trusted networks, enforce least privilege, monitor for memory corruption indicators, and maintain offline backups to mitigate availability risk.
Threat Intelligence Overview
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.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
More in Powerprotect Data Domain
View allPath traversal leading to full system compromise affects Dell PowerProtect Data Domain (DD OS) versions 7.7.1.0 through
Improper authentication in Dell PowerProtect Data Domain (versions 7.7.1.0 through 8.7, plus the LTS2026, LTS2025, and L
Remote, unauthenticated attackers can obtain exposed credentials from Dell PowerProtect Data Domain appliances running F
Stack-based buffer overflow in Dell PowerProtect Data Domain DD OS allows remote unauthenticated attackers to execute ar
Unauthenticated remote command execution is possible on Dell PowerProtect Data Domain appliances running Feature Release
Improper authentication in Dell PowerProtect Data Domain allows remote unauthenticated attackers to bypass authenticatio
Privilege escalation in Dell PowerProtect Data Domain Feature Release 7.7.1.0 through 8.8 allows an authenticated, low-p
Dell PowerProtect Data Domain with Data Domain Operating System (DD OS) versions prior to 8.3.0.15 contain an Insufficie
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
Stack-based buffer overflow in Dell PowerProtect Data Domain allows a low-privileged authenticated remote attacker to po
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
Local attackers can gain full system access to Dell PowerProtect Data Domain storage systems without authentication due
EUVD-2026-111981
GHSA-9cmh-5j7w-fhjr
NVD
CVE.org
Exploit-DB