CVE-2011-4859

CRITICAL

The Schneider Electric Quantum Ethernet Module, as used in the Quantum 140NOE771* and 140CPU65* modules, the Premium TSXETY* and TSXP57* modules, the M340 BMXNOE01* and BMXP3420* modules, and the S...

Affects 57 products across 1 vendor.

CVSS 2.010.0
EPSS3.9%
Percentile90th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity.
◆ AI Analysis — automated analysis, not human-reviewed

The Schneider Electric Quantum Ethernet Module, used in various models, has hardcoded passwords for multiple accounts, allowing remote attackers to gain unauthorized access via TELNET, Windriver Debug, or FTP ports. This vulnerability poses a significant risk to the operational integrity and security of affected systems.

BSID: BS-2011-GLOBAL-316559-C • Model: Qwen/Qwen2.5-72B-Instruct-AWQ • Confidence: HIGH

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Frequently Asked Questions
What is CVE-2011-4859?
The Schneider Electric Quantum Ethernet Module, used in various models, has hardcoded passwords for multiple accounts, allowing remote attackers to gain unauthorized access via TELNET, Windriver Debug, or FTP ports. This vulnerability poses a significant risk to the operational integrity and security of affected systems.
What is the CVSS score for CVE-2011-4859?
CVE-2011-4859 has CVSS 10.0 (Critical). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. EPSS: 3.9%.
Is CVE-2011-4859 actively exploited?
No confirmed active exploitation of CVE-2011-4859 as of 2026-09-25.
How do I remediate CVE-2011-4859?
Priority: IMMEDIATE.
What systems are affected by CVE-2011-4859?
CVE-2011-4859 affects Schneider-Electric Quantum Ethernet Module 140Cpu65150, Quantum Ethernet Module 140Cpu65160, Quantum Ethernet Module 140Cpu65260, Quantum Ethernet Module 140Noe77100, Quantum Ethernet Module 140Noe77101, Quantum Ethernet Module 140Noe77111, Premium Ethernet Module Tsxety4103, Premium Ethernet Module Tsxety5103, Premium Ethernet Module Tsxp57163M, Premium Ethernet Module Tsxp572634M (plus 29 more products).
What NERC-CIP standard applies to CVE-2011-4859?
NERC CIP CIP-007 CIP-007-R2: This CVE violates CIP-007-R2 because it involves unauthorized access to critical cyber assets, which can compromise the reliability and security of the bulk electric system.
What IEC 62443 requirement maps to CVE-2011-4859?
IEC 62443 SR 7.6: This CVE maps to SR 7.6 because it involves the use of hardcoded credentials, which can be exploited to gain unauthorized access to the system, violating the principle of secure authentication and authorization.
Vulnerability Details
CVE IDCVE-2011-4859
BSIDBS-2011-GLOBAL-316559-C BreachSpider Global ID
CVSS VectorAV:N/AC:L/Au:N/C:C/I:C/A:C
Published2011-12-17
Last Modified2026-06-16
ICS Relevance55%
Verticals
ICS-OT
SourceNVD
Official Description

The Schneider Electric Quantum Ethernet Module, as used in the Quantum 140NOE771* and 140CPU65* modules, the Premium TSXETY* and TSXP57* modules, the M340 BMXNOE01* and BMXP3420* modules, and the STB DIO STBNIC2212 and STBNIP2* modules, uses hardcoded passwords for the (1) AUTCSE, (2) AUT_CSE, (3) fdrusers, (4) ftpuser, (5) loader, (6) nic2212, (7) nimrohs2212, (8) nip2212, (9) noe77111_v500, (10) ntpupdate, (11) pcfactory, (12) sysdiag, (13) target, (14) test, (15) USER, and (16) webserver accounts, which makes it easier for remote attackers to obtain access via the (a) TELNET, (b) Windriver Debug, or (c) FTP port.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Remote attackers can exploit the hardcoded passwords to gain unauthorized access to the Schneider Electric Quantum Ethernet Module via TELNET, Windriver Debug, or FTP ports. This can lead to full control over the device, potentially compromising the entire network and leading to data theft, system manipulation, or denial of service.

Exploitation Likelihood: CRITICAL

Affected Products
VendorProductAffected Versions
Schneider-Electric Quantum Ethernet Module 140Cpu65150 ≤ 3.5
Schneider-Electric Quantum Ethernet Module 140Cpu65160 ≤ 3.5
Schneider-Electric Quantum Ethernet Module 140Cpu65260 ≤ 3.5
Schneider-Electric Quantum Ethernet Module 140Noe77100 ≤ 3.4
Schneider-Electric Quantum Ethernet Module 140Noe77101 ≤ 4.9
Schneider-Electric Quantum Ethernet Module 140Noe77111 ≤ 5.0
Schneider-Electric Premium Ethernet Module Tsxety4103 ≤ 5.0
Schneider-Electric Premium Ethernet Module Tsxety5103 ≤ 5.0
Schneider-Electric Premium Ethernet Module Tsxp57163M ≤ 4.9
Schneider-Electric Premium Ethernet Module Tsxp572634M ≤ 4.9
Schneider-Electric Premium Ethernet Module Tsxp573634M ≤ 4.9
Schneider-Electric Premium Ethernet Module Tsxp574634M ≤ 3.5
Schneider-Electric Premium Ethernet Module Tsxp575634M ≤ 3.5
Schneider-Electric Premium Ethernet Module Tsxp576634M ≤ 3.5
Schneider-Electric M340 Ethernet Module Bmxnoe0100 ≤ 2.3
Schneider-Electric M340 Ethernet Module Bmxnoe0110 ≤ 4.65
Schneider-Electric M340 Ethernet Module Bmxp342020 3.50 < 3.50 ≤ 2.2
Schneider-Electric M340 Ethernet Module Bmxp342030 3.50 < 3.50 ≤ 2.2
Schneider-Electric Stb Dio Ethernet Module Stbnic2212 ≤ 2.10
Schneider-Electric Stb Dio Ethernet Module Stbnip2212 ≤ 2.73
Schneider-Electric Stb Dio Ethernet Module Stbnip2311 ≤ 3.01
Schneider-Electric Stbnic2212 (device & firmware) ≤ 2.10
Schneider-Electric Stbnip2212 (device & firmware) ≤ 2.73
Schneider-Electric Tsxp574634M (device & firmware) ≤ 3.5
Schneider-Electric Tsxety4103 (device & firmware) ≤ 5.0
Schneider-Electric Tsxety5103 (device & firmware) ≤ 5.0
Schneider-Electric Tsxp575634M (device & firmware) ≤ 3.5
Schneider-Electric Tsxp571634M (device & firmware) ≤ 4.9
Schneider-Electric Tsxp572634M (device & firmware) ≤ 4.9
Schneider-Electric Tsxp573634M (device & firmware) ≤ 4.9
Schneider-Electric Bmxnoc0401 (device & firmware) ≤ 1.01
Schneider-Electric Bmxnoe0100 (device & firmware) ≤ 2.3
Schneider-Electric Bmxnoe0110 (device & firmware) ≤ 4.65
Schneider-Electric 140Cpu65150 (device & firmware) ≤ 3.5
Schneider-Electric 140Cpu65160 (device & firmware) ≤ 3.5
Schneider-Electric 140Cpu65260 (device & firmware) ≤ 3.5
Schneider-Electric 140Noe77101 (device & firmware) ≤ 4.9
Schneider-Electric 140Noe77111 (device & firmware) ≤ 5.0
Schneider-Electric 140Noc77101 (device & firmware) ≤ 1.01
Schneider-Electric Tsxp576634M (device & firmware) ≤ 3.5
Remediation

No patch URL on record. Monitor vendor security advisories directly.

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 5416 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
● Compensating Controls — AI-drafted, review before deploying MEDIUM CONFIDENCE

Implement strong access controls and change default passwords immediately. Use network segmentation to isolate critical systems from untrusted networks.

SURICATA RULE
alert tcp any any -> any 23 (msg:"Hardcoded password access attempt on TELNET"; content:"AUTCSE"; nocase; sid:9100010; rev:1;)
NERC CIP: CIP-007 CIP-007-R2
This CVE violates CIP-007-R2 because it involves unauthorized access to critical cyber assets, which can compromise the reliability and security of the bulk electric system.
IEC 62443: SR 7.6
This CVE maps to SR 7.6 because it involves the use of hardcoded credentials, which can be exploited to gain unauthorized access to the system, violating the principle of secure authentication and authorization.

Drafted by AI and not validated for your network. Test in an isolated environment before any production deployment. Compensating control only - does not replace vendor patch.

AI Enrichment Record — provenance & audit hash
ModelQwen/Qwen2.5-72B-Instruct-AWQ
ConfidenceHIGH
Enriched At2026-05-24
SHA-512 Audit Hash83ec99151dfe40e878856b8fe6314f04f2c1cf6f007aec4a82701a50589976b13c1f23f91f1682e5353517138e620fad1d60fb44b1c9ff7922c6da2af54a32f6
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