How severe is CVE-2012-0931?

CVE-2012-0931 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2012-0931 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-0931?

CVE-2012-0931 affects Schneider-electric Modicon Quantum Plc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2012-0931?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2012-0931 published?

CVE-2012-0931 was published on 2012-01-28 and last updated on 2026-06-16.

CVE-2012-0931

CVE-2012-0931 is a critical-severity vulnerability in Schneider-electric Modicon Quantum Plc with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Schneider-electric Modicon Quantum Plc
Published: 2012-01-28
Last modified: 2026-06-16

Description

Schneider Electric Modicon Quantum PLC does not perform authentication between the Unity software and PLC, which allows remote attackers to cause a denial of service or possibly execute arbitrary code via unspecified vectors.

Frequently asked questions

What is CVE-2012-0931?: Schneider Electric Modicon Quantum PLC does not perform authentication between the Unity software and PLC, which allows remote attackers to cause a denial of service or possibly execute arbitrary code via unspecified vectors.
How severe is CVE-2012-0931?: CVE-2012-0931 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2012-0931 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-0931?: CVE-2012-0931 affects Schneider-electric Modicon Quantum Plc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2012-0931?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2012-0931 published?: CVE-2012-0931 was published on 2012-01-28 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:h:schneider-electric:modicon_quantum_plc:-:*:*:*:*:*:*:*

More vulnerabilities in Schneider-electric Modicon Quantum Plc

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CVE-2012-0929 — High (CVSS 7.5): Multiple buffer overflows in Schneider Electric Modicon Quantum PLC allow remote attackers to cause a denial of service…
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CVE-2012-0930 — Medium (CVSS 6.1): Cross-site scripting (XSS) vulnerability in Schneider Electric Modicon Quantum PLC allows remote attackers to inject…

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Other CWE-287 (Improper Authentication) vulnerabilities

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CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
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