CVE-2020-5527
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I. Basic Information for CVE-2020-5527
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
When MELSOFT transmission port (UDP/IP) of Mitsubishi Electric MELSEC iQ-R series (all versions), MELSEC iQ-F series (all versions), MELSEC Q series (all versions), MELSEC L series (all versions), and MELSEC F series (all versions) receives massive amount of data via unspecified vectors, resource consumption occurs and the port does not process the data properly. As a result, it may fall into a denial-of-service (DoS) condition. The vendor states this vulnerability only affects Ethernet communication functions.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
多款Mitsubishi Electric产品资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Misubishi Electric MELSEC iQ-R series等都是日本三菱电机（Misubishi Electric）公司的一款可编程逻辑控制器。 多款Mitsubishi Electric产品存在资源管理错误漏洞。攻击者可通过向MELSOFT传输端口（UDP/IP）发送大量数据利用该漏洞造成拒绝服务。以下产品及版本受到影响： MELSEC iQ-R series（所有版本）；MELSEC iQ-F series（所有版本）；MELSEC Q series（所有版本）；MELSEC L se
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Mitsubishi Electric Corporation | MELSOFT transmission port (UDP/IP) of multiple Mitsubishi Electric MELSEC series | MELSEC iQ-R series (all versions), MELSEC iQ-F series (all versions), MELSEC Q series (all versions), MELSEC L series (all versions), and MELSEC F series (all versions) | - |
II. Public POCs for CVE-2020-5527
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://jvn.jp/en/vu/JVNVU91553662/index.htmlx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2020-5527
IV. Related Vulnerabilities
Same vendor: Mitsubishi Electric Corporation
- CVE-2025-14816
Information Disclosure, Tampering, and Denial-of-Service Vul - CVE-2025-14815
Information Disclosure, Tampering, and Denial-of-Service Vul - CVE-2025-2399
Denial of Service (DoS) Vulnerability in Mitsubishi Electric - CVE-2026-1876
Denial-of-Service (DoS) vulnerability in Ethernet function o - CVE-2026-1875
Denial-of-Service (DoS) vulnerability in Ethernet function o
V. Comments for CVE-2020-5527
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