Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessGain physical access to BOSS-N1 controller
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ExploitConnect to exposed on-chip debug/test interface
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ExecutionBypass access control on SMCU
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ImpactRead/modify controller state and boot storage
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture On-chip debug access control
|
| Exploitation Conditions | Requires direct physical access to a Dell BOSS-N1 controller on a 17G PowerEdge server and physical connection to its on-chip debug and test interface on the SMCU; the interface lacks proper access control (CWE-1191), so once physically reached no authentication or user interaction is needed and attack complexity is low. Exploitation is fundamentally LIMITED by the physical-access requirement (AV:P) - remote or network exploitation is not possible - and by needing the specific 17G BOSS-N1 hardware running firmware prior to 2.2.13.2038. This scopes realistic threats to insider access, hardware in transit/servicing, decommissioned units, or evil-maid/supply-chain conditions rather than remote attack. |
| Impact | This is a genuinely low-priority issue despite its 6.8 (Medium) CVSS. The single most important limiting signal is the attack vector: AV:P (Physical) means an attacker must have hands-on access to the physical BOSS-N1 controller card inside a 17G PowerEdge server to reach the on-chip debug/test interface. That constraint dwarfs every other metric. While the vector otherwise looks alarming - AC:L, PR:N, UI:N, and full C:H/I:H/A:H impact - physical access to a rack-mounted enterprise server in a controlled datacenter is a high-bar prerequisite that keeps real-world exposure narrow. There is no EPSS score, no CISA KEV listing, and no public exploit code, so the classification is: no public exploit identified at time of analysis. There are no conflicting signals here - the CVSS network/physical designation is consistent with the description's explicit 'physical access' language. This is the highest-impact of three sibling BOSS advisories in DSA-2026-402 (compared to CVE-2026-80357 at 7.0 with AC:H, and CVE-2026-80358 at 5.1); the higher 6.8 here versus 80358 comes from full C/I/A:H at AC:L, but the physical gate makes it a firmware-hygiene fix rather than an urgent remote threat. Patch to 2.2.13.2038 during normal maintenance windows; prioritize physical/supply-chain security and high-risk assets (evac'd hardware, decommissioned drives, hostile-datacenter scenarios). |
| Exploit ScenarioDerived | An attacker with physical access to a 17G PowerEdge server - for example during hardware servicing, transit, decommissioning, or an evil-maid/supply-chain scenario - connects to the improperly protected on-chip debug and test interface (SMCU) of the BOSS-N1 controller. Through this exposed interface they gain unauthorized access to the controller, potentially reading, modifying, or disabling boot/RAID storage functions. No authentication is required and attack complexity is low, but hands-on hardware access is mandatory; no public exploit code is currently known. |
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Alert meAnalysisAIv1 – Sep 28, 2026
Dell BOSS-N1 controllers running firmware prior to 2.2.13.2038 expose an unprotected on-chip debug and test interface on the SMCU, allowing anyone with physical access to bypass authentication and read or write protected controller memory, yielding high confidentiality, integrity, and availability impact (CVSS 6.8, AV:P/AC:L/PR:N/UI:N). The attack surface is strictly local: exploitation requires hands-on connection to the debug interface of the SMCU on a 17th-generation PowerEdge server, so remote or network attack is impossible and realistic exposure is limited to insiders, hardware in transit or during servicing, decommissioned or resold units, and evil-maid/supply-chain scenarios. No public exploit code or confirmed active exploitation has been identified at time of analysis, and the physical-access prerequisite keeps practical priority low despite the Medium base score.
RemediationAI
Update BOSS-N1 controller firmware to version 2.2.13.2038 or later as documented in Dell advisory DSA-2026-402 (https://www.dell.com/support/kbdoc/en-us/000513073/dsa-2026-402-security-update-for-dell-boot-optimized-server-storage-boss-vulnerability); because the flaw is in the on-chip debug interface itself, the firmware update is the only complete fix. Until it can be applied, treat the issue as a physical-access control problem: restrict and audit physical access to affected 17G PowerEdge servers through locked racks, badge/PACS logging, and tamper-evident seals, accepting that such controls will not stop a determined insider or an attacker who reaches the hardware in transit or during servicing; disable the SMCU on-chip debug and test interface wherever the firmware or platform permits it, understanding that this may hinder field diagnostics and recovery; and enforce secure decommissioning procedures - sanitize or physically destroy storage and controller modules and avoid redeploying units of unknown provenance - since abandoned or resold hardware is the most plausible attack path. Continue monitoring Dell's advisory page for updated firmware and any additional vendor mitigations, and note that no workaround removes the physical-access prerequisite.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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Technical ContextAI · show details
The root cause is CWE-1191 (On-Chip Debug and Test Interface With Improper Access Control), a hardware-rooted weakness in which a JTAG/SWD-style debug and test port on the SMCU of the Dell BOSS-N1 boot device remains enabled and is not protected against unauthorized use. That interface exposes internal registers and memory normally shielded by firmware, so an attacker who physically attaches to it can bypass authentication entirely and directly read or modify controller state, which explains the PR:N/AC:L/C:H/I:H/A:H scoring combined with the AV:P physical vector. The affected component is the BOSS-N1 controller - Dell Boot Optimized Server Storage, the M.2 NVMe boot/RAID device family used in 17th-generation PowerEdge servers - and only firmware builds prior to 2.2.13.2038 are vulnerable; the CPE cpe:2.3:a:dell:boot_optimized_server_storage_(boss) identifies the affected product family. Because the weakness lives in the on-chip debug hardware/firmware boundary rather than a network service, no remote protocol, port, or web endpoint is involved and the attack surface is entirely physical.
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Severity by source
AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Physical access to the debug interface (AV:P) with no auth or interaction (PR:N/UI:N) yields low-complexity full control of the controller (C/I/A:H), matching Dell's 6.8.
Primary rating from Vendor (dell).
CVSS VectorVendor: dell
Lifecycle Timeline
1DescriptionCVE.org
Dell Boot Optimized Server Storage (BOSS), versions prior to 2.2.13.2038, contains an On-Chip Debug and Test Interface With Improper Access Control vulnerability in the SMCU on 17G BOSS-N1 controllers. An unauthenticated attacker with physical access could potentially exploit this vulnerability, leading to Unauthorized access.
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
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
An unauthenticated attacker (CVSS PR:N) who obtains physical access to the on-chip debug and test interface of the SMCU
Unauthenticated physical attackers with access to a server's internals can exploit an improperly protected on-chip debug
EUVD-2026-88309
GHSA-hfcg-gf6x-v4g6
NVD
CVE.org
EPSS
Vulnrichment
Exploit-DB