CVE-2011-4861

Severity: critical (CVSS 10.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2011-12-17 · updated 2026-06-16
Weakness: CWE-264

Description

The modbus_125_handler function in the Schneider Electric Quantum Ethernet Module on the NOE 771 device (aka the Quantum 140NOE771* module) allows remote attackers to install arbitrary firmware updates via a MODBUS 125 function code to TCP port 502.

Affected products

Schneider-Electric Quantum Ethernet Module 140Noe77100: through 3.3; through 3.4
Schneider-Electric Quantum Ethernet Module 140Noe77101: through 4.9
Schneider-Electric Quantum Ethernet Module 140Noe77111: through 5.0

References

http://reversemode.com/index.php?option=com_content&task=view&id=80&Itemid=1
http://reversemode.com/index.php?option=com_content&task=view&id=80&Itemid=1

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