CVE-2021-20601

Improper input validation vulnerability in GOT2000 series GT27 model all versions, GOT2000 series GT25 model all versions, GOT2000 series GT23 model all versions, GOT2000 series GT21 model all versions, GOT SIMPLE series GS21 model all versions, and GT SoftGOT2000 all versions allows an remote unauthenticated attacker to write a value that exceeds the configured input range limit by sending a malicious packet to rewrite the device value. As a result, the system operation may be affected, such as malfunction.

• CWE-20

• https://jvn.jp/vu/JVNVU98072504Third Party Advisory
• https://us-cert.cisa.gov/ics/advisories/icsa-21-320-02Third Party Advisory, US Government Resource
• https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2021-018.pdfVendor Advisory
• https://jvn.jp/vu/JVNVU98072504Third Party Advisory
• https://us-cert.cisa.gov/ics/advisories/icsa-21-320-02Third Party Advisory, US Government Resource
• https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2021-018.pdfVendor Advisory

Published

Nov 23, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-20596NULL Pointer Dereference in MELSEC-F Series FX3U-ENET firmwa…7.5
• CVE-2021-20597Insufficiently Protected Credentials vulnerability in Mitsub…9.1
• CVE-2021-20598Overly Restrictive Account Lockout Mechanism vulnerability i…5.3
• CVE-2021-20599Cleartext Transmission of Sensitive InformationCleartext tra…7.5
• CVE-2021-2060Vulnerability in the MySQL Server product of Oracle MySQL (c…4.9
• CVE-2021-20600Uncontrolled resource consumption in Mitsubishi Electric MEL…5.9
• CVE-2021-20602Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
• CVE-2021-20603Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
• CVE-2021-20604Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
• CVE-2021-20605Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
• CVE-2021-20606Out-of-bounds Read vulnerability in Mitsubishi Electric GX W…5.5
• CVE-2021-20607Integer Underflow vulnerability in Mitsubishi Electric GX Wo…5.5