CVE-2026-80155 Lantronix SLC8000 - Authentication Bypass

Lantronix SLC8000 < 9.7.0.5, EMG8500/EMG7500 < 9.7.0.1, and all versions of SLB882/SLCx-03/SLCx-02 contain an authentication bypass caused by path traversal in the web management portal upload endpoint, letting unauthenticated attackers read sensitive files and upload arbitrary files leading to remote code execution, exploit requires crafted cookie value.

CVSS base score 10.0 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
1.03% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Remote Code Execution, Information Disclosure, Data Tampering
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Published
22 September 2026
Updated
15 October 2026
Weakness
CWE-22

Vendor fix

Update to firmware v9.7.0.5 for SLC8000, v9.7.0.1 for EMG8500/EMG7500, or latest firmware for other affected models.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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