How severe is CVE-2020-5599?

CVE-2020-5599 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-2020-5599 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5599?

CVE-2020-5599 affects Mitsubishielectric Coreos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-5599?

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-2020-5599 published?

CVE-2020-5599 was published on 2020-07-07 and last updated on 2026-06-17.

CVE-2020-5599

CVE-2020-5599 is a critical-severity vulnerability in Mitsubishielectric Coreos 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-88.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 3% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-88
Affected product: Mitsubishielectric Coreos
Published: 2020-07-07
Last modified: 2026-06-17

Description

TCP/IP function included in the firmware of Mitsubishi Electric GOT2000 series (CoreOS with version -Y and earlier installed in GT27 Model, GT25 Model, and GT23 Model) contains an improper neutralization of argument delimiters in a command ('Argument Injection') vulnerability, which may allow a remote attacker to stop the network functions of the products or execute a malicious program via a specially crafted packet.

Frequently asked questions

What is CVE-2020-5599?: TCP/IP function included in the firmware of Mitsubishi Electric GOT2000 series (CoreOS with version -Y and earlier installed in GT27 Model, GT25 Model, and GT23 Model) contains an improper neutralization of argument delimiters in a command ('Argument Injection') vulnerability, which may allow a remote attacker to stop the network functions of the products or execute a malicious program via a specially crafted packet.
How severe is CVE-2020-5599?: CVE-2020-5599 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-2020-5599 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5599?: CVE-2020-5599 affects Mitsubishielectric Coreos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-5599?: 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-2020-5599 published?: CVE-2020-5599 was published on 2020-07-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:mitsubishielectric:coreos:*:*:*:*:*:*:*:*

More vulnerabilities in Mitsubishielectric Coreos

CVE-2020-5648 — Critical (CVSS 9.8): Improper neutralization of argument delimiters in a command ('Argument Injection') vulnerability in TCP/IP function…
CVE-2020-5647 — Critical (CVSS 9.8): Improper access control vulnerability in TCP/IP function included in the firmware of GT14 Model of GOT 1000 series…
CVE-2020-5644 — Critical (CVSS 9.8): Buffer overflow vulnerability in TCP/IP function included in the firmware of GT14 Model of GOT 1000 series…
CVE-2020-5595 — Critical (CVSS 9.8): TCP/IP function included in the firmware of Mitsubishi Electric GOT2000 series (CoreOS with version -Y and earlier…
CVE-2020-5649 — High (CVSS 7.5): Resource management error vulnerability in TCP/IP function included in the firmware of GT14 Model of GOT 1000 series…
CVE-2020-5646 — High (CVSS 7.5): NULL pointer dereferences vulnerability in TCP/IP function included in the firmware of GT14 Model of GOT 1000 series…

All CVEs affecting Mitsubishielectric Coreos →

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