CVE-2020-5597
No exploitation reported by the sources we read.
- Published2020-07-07
- WeaknessCWE-476
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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.
Timeline
dates in UTC- 2020-07-0709:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-5597?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-5597?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| — | ≤ y | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
Mitsubishi Electric GOT2000 Series
GT23 model: GOT2000 CoreOS Version -Y and earlier · GT27 model: GOT2000 CoreOS Version -Y and earlier · GT25 model: GOT2000 CoreOS Version -Y and earlier
Fix
- Mitigation from the vendor CISA ICSA-20-189-02 · 3 productsInstall the MELSOFT GT Designer3 (2000): Version 1.240A or later on your personal computer.
- Mitigation from the vendor CISA ICSA-20-189-02 · 3 productsStart the MELSOFT GT Designer3 and copy CoreOS of Version -Z or later to SD card.
- Mitigation from the vendor CISA ICSA-20-189-02 · 3 productsInsert the SD card removed from the personal computer to the target products and update to the latest version of CoreOS.
- Mitigation from the vendor CISA ICSA-20-189-02 · 3 productsPlease contact your local Mitsubishi sales office about MELSOFT GT Designer3 (2000).
Advisories and patches
- www.mitsubishielectric.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.17.5read 2026-10-23
- NVDCVSS 2.05read 2026-10-23
- NVDweakness (CWE)CWE-476read 2026-10-23
- FIRST EPSSEPSS score2.0 %2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2020-07-07
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-5597?
Is CVE-2020-5597 actively exploited?
What is the CVSS score for CVE-2020-5597?
Running Mitsubishi Electric GOT2000? Hear about its next vulnerability
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.