Lantronix SLC8000/EMG8500/EMG7500/SLB882/SLCx-03/SLCx-02 Mfc Eeprom Write Command system stack-based overflow

Summaryinfo

A vulnerability was found in Lantronix SLC8000, EMG8500, EMG7500, SLB882, SLCx-03 and SLCx-02. It has been classified as very critical. Affected by this issue is the function system of the component Mfc Eeprom Write Command. The manipulation leads to stack-based overflow. This vulnerability is uniquely identified as CVE-2026-80147. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Lantronix SLC8000, EMG8500, EMG7500, SLB882, SLCx-03 and SLCx-02 and classified as very critical. This issue affects the function system of the component Mfc Eeprom Write Command. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Lantronix SLC8000 before firmware v9.7.0.2, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882/SLCx-03/SLCx-02 contain a stack-based buffer overflow vulnerability that allows authenticated attackers to potentially execute arbitrary code by exploiting an undocumented mfc eeprom write command that copies unbounded user input into a bounded stack buffer before passing it to a system() call. Attackers can authenticate as any user to the terminal or CLI interface and supply an oversized input to trigger the overflow, potentially achieving complete loss of confidentiality, integrity, and availability on the affected device and impacting downstream serial-attached devices.

The advisory is shared at revrb.net. The identification of this vulnerability is CVE-2026-80147 since 08/25/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/22/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Lantronix

Name

• EMG7500
• EMG8500
• SLB882
• SLC8000
• SLCx-02
• SLCx-03

License

• commercial

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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