What’s Vulnerable › Vulnerabilities

CVE-2021-20590

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-22 · updated 2026-06-17
• Weakness: CWE-287

Description

Improper authentication vulnerability in GOT2000 series GT27 model VNC server versions 01.39.010 and prior, GOT2000 series GT25 model VNC server versions 01.39.010 and prior, GOT2000 series GT21 model GT2107-WTBD VNC server versions 01.40.000 and prior, GOT2000 series GT21 model GT2107-WTSD VNC server versions 01.40.000 and prior, GOT SIMPLE series GS21 model GS2110-WTBD-N VNC server versions 01.40.000 and prior and GOT SIMPLE series GS21 model GS2107-WTBD-N VNC server versions 01.40.000 and prior allows a remote unauthenticated attacker to gain unauthorized access via specially crafted packets when the "VNC server" function is used.

Affected products

• Mitsubishielectric Got2000 Gt25 Firmware: through 01.39.010
• Mitsubishielectric Got2000 Gt27 Firmware: through 01.39.010
• Mitsubishielectric Gs2107-Wtbd-N Firmware: through 01.40.000
• Mitsubishielectric Gs2110-Wtbd-N Firmware: through 01.40.000
• Mitsubishielectric Gt2107-Wtbd Firmware: through 01.40.000
• Mitsubishielectric Gt2107-Wtsd Firmware: through 01.40.000

References

• https://jvn.jp/vu/JVNVU97615777/index.html
• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-001_en.pdf
• https://jvn.jp/vu/JVNVU97615777/index.html
• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-001_en.pdf

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