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Attack ChainAIDerived

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

  1. Access
    Identify host with dhclient backend explicitly configured
  2. Delivery
    Obtain low-privilege local shell access
  3. Exploit
    Craft MUD URL containing injected OS commands
  4. Execution
    Trigger DHCP renegotiation or network event requiring user interaction
  5. Persist
    Injected command executes in privileged NetworkManager/dhclient context
  6. Impact
    Local privilege escalation achieved

Vulnerability Assessment

Weakness
CWE
CWE-78
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.

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Exploitation Conditions

Exploitation requires three specific, concurrent conditions to be met simultaneously: (1) The target system must be running NetworkManager with the dhclient backend explicitly configured by an administrator via 'dhcp=dhclient' in NetworkManager.conf - this is a non-default configuration, as NetworkManager ships with its own internal DHCP client and does not use dhclient unless deliberately set; (2) The attacker must hold a low-privileged local user account on the system (CVSS PR:L confirms authentication is required at minimum privilege level); and (3) Some form of user interaction must occur to trigger dhclient's processing of the crafted MUD URL (CVSS UI:R), which may involve a network reconnection event or an administrative action on the host. What limits exploitation: default NetworkManager deployments are explicitly stated as unaffected; the vulnerability is not remotely reachable (AV:L); and high attack complexity (AC:H) implies reliable triggering requires specific timing or environmental conditions beyond merely supplying a crafted URL.
Impact

The CVSS 3.1 vector AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H scores 6.7 (Medium), and that rating is appropriate - it should not be inflated by the full CIA impact scores alone. Multiple orthogonal signals suppress the effective real-world risk: the attack vector is local (not network-reachable), attack complexity is high, user interaction is required, and most critically, the vulnerability only manifests when an administrator has explicitly switched to the non-default dhclient backend. No EPSS data was provided in the available intelligence; no CISA KEV listing exists; and no public exploit code has been identified at time of analysis. These factors collectively indicate a low-urgency finding for the majority of environments. However, organizations that have explicitly configured dhclient - particularly in managed Kubernetes or multi-tenant RHEL environments where local user access is shared - should treat this as a higher operational priority given the full confidentiality, integrity, and availability impact upon successful exploitation.
Exploit ScenarioDerived

A low-privileged local user on a system where an administrator has configured dhclient as the NetworkManager DHCP backend crafts a MUD URL embedding injected OS shell commands. When a network event - such as a DHCP lease renewal or interface reconnect, potentially requiring another user's interaction to initiate - causes dhclient to process the MUD URL, the injected commands execute in a privileged context. No public exploit code has been identified at time of analysis, and reliable exploitation is further constrained by the high attack complexity rating.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Jun 04, 2026

Local privilege escalation in NetworkManager's dhclient backend allows a low-privileged local user to execute arbitrary OS commands with elevated privileges by supplying a crafted Manufacturer Usage Description (MUD) URL. Exploitation is strictly limited to systems where an administrator has explicitly reconfigured NetworkManager to use the dhclient backend - a non-default setting - meaning the vast majority of deployments are unaffected by design. CVSS 6.7 (local vector, high complexity, user interaction required) accurately reflects the constrained exploitation conditions; no public exploit code or CISA KEV listing exists at time of analysis.

RemediationAI

No vendor-released patch version has been independently confirmed from the available data - the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-10805 and the associated Bugzilla ticket at https://bugzilla.redhat.com/show_bug.cgi?id=2484613 should be monitored for patch availability and exact fix versions. As an immediate compensating control, administrators should audit whether dhclient has been explicitly set as the NetworkManager DHCP backend by checking /etc/NetworkManager/NetworkManager.conf for the directive 'dhcp=dhclient'; if present, reverting to the default internal backend ('dhcp=internal') eliminates the attack surface entirely with minimal operational impact, as the internal backend supports standard DHCP functionality. If dhclient is operationally required for specific features, restrict local interactive shell access for untrusted users on affected systems and audit which accounts have permissions to influence network interface configuration or trigger DHCP renegotiation events.

Affects your stack

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Technical ContextAI · show details

NetworkManager is the standard network management daemon on Linux, supporting multiple DHCP backends including its own internal client (the default) and the legacy ISC dhclient. The dhclient backend processes Manufacturer Usage Description (MUD) URLs - an IoT-oriented mechanism defined in RFC 8520 that allows devices to declare their intended network behavior via a URL supplied during DHCP negotiation. CWE-78 (Improper Neutralization of Special Elements Used in an OS Command - OS Command Injection) indicates that MUD URL content is passed unsanitized into a shell script or exec call within the dhclient integration layer, allowing injection of arbitrary shell commands. Affected CPE strings cover Red Hat Enterprise Linux 6, 7, 8, and 10, as well as Multicluster Engine for Kubernetes, all within the Red Hat product ecosystem.

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Severity by source

Vendor (redhat) PRIMARY 6.7 MEDIUM
AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
SUSE MEDIUM
Red Hat 6.7 MEDIUM

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

A flaw was found in NetworkManager. This local privilege escalation vulnerability exists in NetworkManager's dhclient backend when processing malformed Manufacturer Usage Description (MUD) URLs. A local user can exploit this flaw to escalate privileges by triggering a script via a crafted MUD URL, provided an administrator has explicitly configured NetworkManager to use dhclient. This issue does not affect default configurations of NetworkManager.

Threat Intelligence Overview

EPSS Score
0.0%
Top 94% exploitable
Social Media
1
Sightings
Data Quality
7 sources
Confidence: High
EUVD NVD CVE.org EPSS Vulnrichment Vendor CIRCL VulDB

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 MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
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
Defer
Exploitation
None
System Exposure· derived
Small
Automatable
No
Human Impact· derived
Medium
Technical Impact
Total

Priority Score

34
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +34
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

OS Command Injection CRITICAL

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

Privilege Escalation HIGH

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.

Affected Products (CPE)CVE.org

cpe:2.3:a:red_hat:multicluster_engine_for_kubernetes:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_10:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_10:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_10:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_10:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_6:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_6:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_7:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_7:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_8:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_8:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_9:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_9:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_9:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_9:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_jboss_enterprise_application_platform_expansion_pack:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_openshift_container_platform_4:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_openshift_container_platform_4:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_openshift_container_platform_4:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_openshift_container_platform_4:*:*:*:*:*:*:*:*
+ 6 more

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Same weakness CWE-78 – OS Command Injection

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Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise Micro 5.3 Fixed
SUSE Linux Enterprise Micro 5.4 Fixed
SUSE Linux Enterprise Micro 5.5 Fixed

References

Advisories & patches
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-10805 ADVISORY https://vuldb.com/vuln/368265 REF https://access.redhat.com/errata/RHSA-2026:58555 REF https://access.redhat.com/errata/RHSA-2026:58572 REF https://access.redhat.com/errata/RHSA-2026:61239 REF https://access.redhat.com/errata/RHSA-2026:61243 REF https://access.redhat.com/errata/RHSA-2026:61244 REF https://access.redhat.com/errata/RHSA-2026:61341 REF https://access.redhat.com/errata/RHSA-2026:61572 REF https://access.redhat.com/errata/RHSA-2026:61580 REF https://access.redhat.com/security/cve/CVE-2026-10805 REF https://bugzilla.redhat.com/show_bug.cgi?id=2484613

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