Integer underflow in Mitsubishi Electric GX Works2; Mitsubishi Electric MELSOFT…
Priority LOW 27CWE-191Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-191 and the CVSS impact.
Summary
Integer Underflow vulnerability in Mitsubishi Electric GX Works2 versions 1.606G and prior, Mitsubishi Electric MELSOFT Navigator versions 2.84N and prior and Mitsubishi Electric EZSocket versions 5.4 and prior allows an attacker to cause a DoS condition in the software by getting a user to open malicious project file specially crafted by an attacker.
Why it matters now
EPSS 0.00992 62nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Mitsubishi Electric GX Works2; Mitsubishi Electric MELSOFT Navigator; Mitsubishi Electric EZSocket | Mitsubishi Electric GX Works2 versions 1.606G and prior; Mitsubishi Electric MELSOFT Navigator versions 2.84N and prior; Mitsubishi Electric EZSocket versions 5.4 and prior | — | No fix listed | CNA |
- Mitsubishi Electric GX Works2; Mitsubishi Electric MELSOFT Navigator; Mitsubishi Electric EZSocket Vendor— Affected Mitsubishi Electric GX Works2 versions 1.606G and prior; Mitsubishi Electric MELSOFT Navigator versions 2.84N and prior; Mitsubishi Electric EZSocket versions 5.4 and prior Fixed in — No fix listed CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mitsubishielectric:ezsocket:*:*:*:*:*:*:*:* | up to 5.4 | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:a:mitsubishielectric:gx_works2:*:*:*:*:*:*:*:* | up to 1.606g | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:a:mitsubishielectric:melsoft_navigator:*:*:*:*:*:*:*:* | all versions | Vulnerable | Mitsubishi Electric Europe B.V. |
- cpe:2.3:a:mitsubishielectric:ezsocket:*:*:*:*:*:*:*:* Versions up to 5.4 Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:a:mitsubishielectric:gx_works2:*:*:*:*:*:*:*:* Versions up to 1.606g Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:a:mitsubishielectric:melsoft_navigator:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Mitsubishi Electric Europe B.V.
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20607
- 2026-10-03 Alias added: GHSA-c5g3-qqp2-f4cv
References
More Mitsubishi Electric Europe B.V. Ezsocket vulnerabilities
- TI-2023-06346 Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')… CVSS 3.1CRITICAL 9.8
- TI-2021-03821 Memory corruption in Mitsubishi Electric Corporation CPU Module Logging Configuration Tool CVSS 3.1CRITICAL 9.8
- TI-2021-03820 Heap-based buffer overflow in Mitsubishi Electric Corporation CPU Module Logging… CVSS 3.1CRITICAL 9.8
- TI-2020-11372 Mitsubishi Electric Factory Automation Engineering Products Unquoted Search Path or Element CVSS 3.1CRITICAL 9.8
- TI-2020-11347 Mitsubishi Electric Multiple Factory Automation Engineering Software Products (Update A) - Permission Issues CVSS 3.1CRITICAL 9.8
- TI-2023-06345 Missing authentication in Mitsubishi Electric Corporation EZSocket CVSS 3.1HIGH 7.5
Sources
- CVE-2021-20607 · CVE Program
- CVE-2021-20607 · NVD
- FIRST EPSS
- GHSA-c5g3-qqp2-f4cv · GitHub Advisory Database · CC BY 4.0
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