CVE-2026-80154Network attack vector

Privilege escalation via predictable session tokens

Published Sep 22, 2026 · Updated Sep 22, 2026

Authentication bypass in all firmware for Lantronix out-of-band appliances allows remote attackers to elevate privileges through the web portal. Tokens are derived deterministically from the device model and current second, while crafted URI extension handling bypasses source-address and User-Agent checks. Portal access and an active logged-in session are required; successful exploitation grants elevated control and can affect serial-attached devices.

CVSS severityUnavailable
Unscored
EPSS probability0.63%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in all firmware for Lantronix out-of-band appliances allows remote attackers to elevate privileges through the web portal. Tokens are derived deterministically from the device model and current second, while crafted URI extension handling bypasses source-address and User-Agent checks. Portal access and an active logged-in session are required; successful exploitation grants elevated control and can affect serial-attached devices.

The record

CVE
CVE-2026-80154
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
Lantronix
Product
SLC 8000
Classifications
T1550.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 2026Record 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=*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Lantronix · SLC 8000version=*
Lantronix · SLCx-03version=*
Lantronix · SLCx-02version=*
Lantronix · EMG 8500version=*
Lantronix · SLB882version=*
Lantronix · EMG 7500version=*

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1550.004Web Session Cookie

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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