Extreme Networks ExtremeXOS up to 31.7.3/33.1.99/33.7.0 mv cp rm file utilities improper authorization

Summaryinfo

A vulnerability classified as very critical has been found in Extreme Networks ExtremeXOS up to 31.7.3/33.1.99/33.7.0. Impacted is an unknown function of the component mv cp rm file utilities. Performing a manipulation results in improper authorization. This vulnerability is known as CVE-2026-8170. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Extreme Networks ExtremeXOS up to 31.7.3/33.1.99/33.7.0. It has been classified as very critical. This affects some unknown processing of the component mv cp rm file utilities. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The mv, cp, and rm file utilities exposed within the ExtremeXOS (EXOS) shell environment fail to safely canonicalize paths and follow symbolic links outside of the intended privilege boundary. An attacker with low-privilege CLI access can create a symbolic link that references a privileged filesystem location and then invoke the affected utilities to read, modify, or replace security-critical files outside of their authorized scope. Under certain conditions, this may enable escalation to root-level access and persistent modification of the device software stack. Exploitation is possible remotely by an attacker holding a low-privilege account, or locally via the serial console.

It is possible to read the advisory at extremenetworks.com. This vulnerability is uniquely identified as CVE-2026-8170 since 05/08/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/20/2026). The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

Upgrading to version 31.7.4, 32.7.4.15, 33.1.100 or 33.7.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-46048). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Extreme Networks

Name

• ExtremeXOS

Version

• 31.7.0
• 31.7.1
• 31.7.2
• 31.7.3
• 33.0
• 33.1
• 33.1.0
• 33.1.1
• 33.1.2
• 33.1.3
• 33.1.4
• 33.1.5
• 33.1.6
• 33.1.7
• 33.1.8
• 33.1.9
• 33.1.10
• 33.1.11
• 33.1.12
• 33.1.13
• 33.1.14
• 33.1.15
• 33.1.16
• 33.1.17
• 33.1.18
• 33.1.19
• 33.1.20
• 33.1.21
• 33.1.22
• 33.1.23
• 33.1.24
• 33.1.25
• 33.1.26
• 33.1.27
• 33.1.28
• 33.1.29
• 33.1.30
• 33.1.31
• 33.1.32
• 33.1.33
• 33.1.34
• 33.1.35
• 33.1.36
• 33.1.37
• 33.1.38
• 33.1.39
• 33.1.40
• 33.1.41
• 33.1.42
• 33.1.43
• 33.1.44
• 33.1.45
• 33.1.46
• 33.1.47
• 33.1.48
• 33.1.49
• 33.1.50
• 33.1.51
• 33.1.52
• 33.1.53
• 33.1.54
• 33.1.55
• 33.1.56
• 33.1.57
• 33.1.58
• 33.1.59
• 33.1.60
• 33.1.61
• 33.1.62
• 33.1.63
• 33.1.64
• 33.1.65
• 33.1.66
• 33.1.67
• 33.1.68
• 33.1.69
• 33.1.70
• 33.1.71
• 33.1.72
• 33.1.73
• 33.1.74
• 33.1.75
• 33.1.76
• 33.1.77
• 33.1.78
• 33.1.79
• 33.1.80
• 33.1.81
• 33.1.82
• 33.1.83
• 33.1.84
• 33.1.85
• 33.1.86
• 33.1.87
• 33.1.88
• 33.1.89
• 33.1.90
• 33.1.91
• 33.1.92
• 33.1.93
• 33.1.94
• 33.1.95
• 33.1.96
• 33.1.97
• 33.1.98
• 33.1.99
• 33.2
• 33.3
• 33.4
• 33.5
• 33.6
• 33.7.0

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