CVE-2025-8286Network attack vector

Unauthenticated device control via exposed Telnet CLI

Published Jul 31, 2025 · Updated Aug 15, 2025

Missing authentication in all Güralp FMUS and MIN device versions allows remote attackers to control devices through a Telnet CLI. The network-exposed command-line interface accepts Telnet sessions without verifying credentials before granting access to critical functions. Network reachability is sufficient to modify hardware configurations and data or factory-reset the device, interrupting its configured operation.

CVSS severity9.3
Critical
EPSS probability1.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in all Güralp FMUS and MIN device versions allows remote attackers to control devices through a Telnet CLI. The network-exposed command-line interface accepts Telnet sessions without verifying credentials before granting access to critical functions. Network reachability is sufficient to modify hardware configurations and data or factory-reset the device, interrupting its configured operation.

The record

CVE
CVE-2025-8286
Published
Jul 31, 2025
Updated
Aug 15, 2025
Vendor
Güralp Systems
Product
Güralp MIN Series Devices
Classifications
CWE-306, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=All versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Güralp Systems · Güralp MIN Series Devicesversion=All versions
Güralp Systems · Güralp FMUS Seriesversion=All versions

Published CVSS scores

9.8ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3ICS-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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.

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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-306Missing Authentication for Critical Function
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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