Is CVE-2011-4861 being actively exploited?

CVE-2011-4861 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2011-4861?

CVE-2011-4861 has a CVSS 2.0 base score of 10.0 (HIGH).

CVE-2011-4861

HIGH · CVSS 10.0EPSS 3.0%EU EUVD

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.

Key facts

CVSS score: 10.0 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Weakness (CWE): CWE-264
EPSS score: 3.0% (88th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-4778)
Published: December 17, 2011
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-4778 in the EU Vulnerability Database. Last updated in EUVD on September 16, 2024.

View on the EU Vulnerability Database

Affected products

schneider-electric / quantum ethernet module 140noe77100
schneider-electric / quantum ethernet module 140noe77101
schneider-electric / quantum ethernet module 140noe77111

References

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

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain