CVE-2023-39248Network attack vector

Network outage via VLT and VRRP resource exhaustion

Published Dec 5, 2023 · Updated May 28, 2025

Uncontrolled resource consumption in Dell SmartFabric OS10 10.5.5.5 allows remote attackers to flood the network and interrupt service. The switch software exhausts an unspecified resource when both Virtual Link Trunking and Virtual Router Redundancy Protocol are enabled; Dell has not disclosed the code-level locus or triggering packet sequence. Exploitation requires both features to be enabled and causes an availability-only outage for legitimate network users.

CVSS severity7.5
High
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Dell SmartFabric OS10 10.5.5.5 allows remote attackers to flood the network and interrupt service. The switch software exhausts an unspecified resource when both Virtual Link Trunking and Virtual Router Redundancy Protocol are enabled; Dell has not disclosed the code-level locus or triggering packet sequence. Exploitation requires both features to be enabled and causes an availability-only outage for legitimate network users.

The record

CVE
CVE-2023-39248
Published
Dec 5, 2023
Updated
May 28, 2025
Vendor
Dell
Product
Dell SmartFabric OS10
Classifications
CWE-400, T1498.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 5, 2023CVE publishedPublication date reported by the CVE source.
  2. May 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.5.5.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Dell · Dell SmartFabric OS10version=10.5.5.5

Published CVSS scores

7.5DellCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1498.001Network Denial of Service Direct Network Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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