CVE-2020-5603

Uncontrolled resource consumption vulnerability in Mitsubishi Electoric FA Engineering Software (CPU Module Logging Configuration Tool Ver. 1.94Y and earlier, CW Configurator Ver. 1.010L and earlier, EM Software Development Kit (EM Configurator) Ver. 1.010L and earlier, GT Designer3 (GOT2000) Ver. 1.221F and earlier, GX LogViewer Ver. 1.96A and earlier, GX Works2 Ver. 1.586L and earlier, GX Works3 Ver. 1.058L and earlier, M_CommDTM-HART Ver. 1.00A, M_CommDTM-IO-Link Ver. 1.02C and earlier, MELFA-Works Ver. 4.3 and earlier, MELSEC-L Flexible High-Speed I/O Control Module Configuration Tool Ver.1.004E and earlier, MELSOFT FieldDeviceConfigurator Ver. 1.03D and earlier, MELSOFT iQ AppPortal Ver. 1.11M and earlier, MELSOFT Navigator Ver. 2.58L and earlier, MI Configurator Ver. 1.003D and earlier, Motion Control Setting Ver. 1.005F and earlier, MR Configurator2 Ver. 1.72A and earlier, MT Works2 Ver. 1.156N and earlier, RT ToolBox2 Ver. 3.72A and earlier, and RT ToolBox3 Ver. 1.50C and earlier) allows an attacker to cause a denial of service (DoS) condition attacks via unspecified vectors.

Published: 2020-06-30 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-5603 is rated Moderate Risk (51.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.49%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-5603

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.59% 0.49% -0.10%
2 2025-03-29 0.49% 0.59% +0.10%
3 2025-03-17 — 0.49% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-5603

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2020-5603

Affected software / configurations for CVE-2020-5603

Vendor Product Version Raw CPE
mitsubishielectric cpu_module_logging_configuration_tool <= 1.94y cpe:2.3:a:mitsubishielectric:cpu_module_logging_configuration_tool:*:*:*:*:*:*:*:*
mitsubishielectric cw_configurator <= 1.010l cpe:2.3:a:mitsubishielectric:cw_configurator:*:*:*:*:*:*:*:*
mitsubishielectric em_configurator <= 1.010l cpe:2.3:a:mitsubishielectric:em_configurator:*:*:*:*:*:*:*:*
mitsubishielectric gt_designer3 <= 1.221f cpe:2.3:a:mitsubishielectric:gt_designer3:*:*:*:*:*:*:*:*
mitsubishielectric gx_logviewer <= 1.100e cpe:2.3:a:mitsubishielectric:gx_logviewer:*:*:*:*:*:*:*:*
mitsubishielectric gx_works2 <= 1.590q cpe:2.3:a:mitsubishielectric:gx_works2:*:*:*:*:*:*:*:*
mitsubishielectric gx_works3 <= 1.060n cpe:2.3:a:mitsubishielectric:gx_works3:*:*:*:*:*:*:*:*
mitsubishielectric m_commdtm-hart <= 1.01b cpe:2.3:a:mitsubishielectric:m_commdtm-hart:*:*:*:*:*:*:*:*
mitsubishielectric m_commdtm-io-link <= 1.03d cpe:2.3:a:mitsubishielectric:m_commdtm-io-link:*:*:*:*:*:*:*:*
mitsubishielectric melfa-works <= 4.4 cpe:2.3:a:mitsubishielectric:melfa-works:*:*:*:*:*:*:*:*
mitsubishielectric melsec-l_flexible_high-speed_i\/o_control_module_configuration_tool <= 1.005f cpe:2.3:a:mitsubishielectric:melsec-l_flexible_high-speed_i\/o_control_module_configuration_tool:*:*:*:*:*:*:*:*
mitsubishielectric melsoft_fielddeviceconfigurator <= 1.04e cpe:2.3:a:mitsubishielectric:melsoft_fielddeviceconfigurator:*:*:*:*:*:*:*:*
mitsubishielectric melsoft_iq_appportal <= 1.14q cpe:2.3:a:mitsubishielectric:melsoft_iq_appportal:*:*:*:*:*:*:*:*
mitsubishielectric melsoft_navigator <= 2.62q cpe:2.3:a:mitsubishielectric:melsoft_navigator:*:*:*:*:*:*:*:*
mitsubishielectric mi_configurator <= 1.004e cpe:2.3:a:mitsubishielectric:mi_configurator:*:*:*:*:*:*:*:*
mitsubishielectric motion_control_setting <= 1.006g cpe:2.3:a:mitsubishielectric:motion_control_setting:*:*:*:*:*:*:*:*
mitsubishielectric mr_configurator2 <= 1.100e cpe:2.3:a:mitsubishielectric:mr_configurator2:*:*:*:*:*:*:*:*
mitsubishielectric mt_works2 <= 1.160s cpe:2.3:a:mitsubishielectric:mt_works2:*:*:*:*:*:*:*:*
mitsubishielectric rt_toolbox2 <= 3.73b cpe:2.3:a:mitsubishielectric:rt_toolbox2:*:*:*:*:*:*:*:*
mitsubishielectric rt_toolbox3 <= 1.60n cpe:2.3:a:mitsubishielectric:rt_toolbox3:*:*:*:*:*:*:*:*

References for CVE-2020-5603

cvelogic Threat Intelligence