How severe is CVE-2020-5597?

CVE-2020-5597 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-5597 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5597?

CVE-2020-5597 affects Mitsubishielectric Coreos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-5597?

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

When was CVE-2020-5597 published?

CVE-2020-5597 was published on 2020-07-07 and last updated on 2026-06-17.

CVE-2020-5597

CVE-2020-5597 is a high-severity vulnerability in Mitsubishielectric Coreos with a CVSS 3.x base score of 7.5. 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-476.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
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 a null pointer dereference 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-2020-5597?: 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 a null pointer dereference 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-2020-5597?: CVE-2020-5597 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-5597 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5597?: CVE-2020-5597 affects Mitsubishielectric Coreos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-5597?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-5597 published?: CVE-2020-5597 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

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CVE-2020-5599 — Critical (CVSS 9.8): TCP/IP function included in the firmware of Mitsubishi Electric GOT2000 series (CoreOS with version -Y and earlier…
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…

All CVEs affecting Mitsubishielectric Coreos →

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Browse all CWE-476 (NULL Pointer Dereference) vulnerabilities →