HOMEVULNERABILITIESCVE-2020-5596
HIGH

CVE-2020-5596

CWE-384Published: July 7, 2020· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official 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) does not properly manage sessions, which may allow a remote attacker to stop the network functions of the products or execute a malicious program via a specially crafted packet.

NVD Source

Technical Analysis

CVE-2020-5596 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

mitsubishielectric4 product(s)
coreosgot2000 gt23got2000 gt25got2000 gt27
Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://jvn.jp/en/vu/JVNVU95413676/index.html
ADVISORYhttps://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-005_en.pdf
ADVISORYhttps://jvn.jp/en/vu/JVNVU95413676/index.html
ADVISORYhttps://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-005_en.pdf

All References (4)

→
https://jvn.jp/en/vu/JVNVU95413676/index.htmlThird Party Advisory
→
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-005_en.pdfVendor Advisory
→
https://jvn.jp/en/vu/JVNVU95413676/index.htmlThird Party Advisory
→
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-005_en.pdfVendor Advisory

Quick Facts

CVE IDCVE-2020-5596
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-384
CISA KEVNo
Affected1 vendor(s)
PublishedJul 7, 2020

Related CVEs (CWE-384)

CVE-2021-20151
10.0
CVE-2024-11317
10.0
CVE-2017-12868
9.8
CVE-2017-12873
9.8
CVE-2015-1820
9.8
CVE-2016-10405
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-5596 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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