What’s Vulnerable › Vulnerabilities

CVE-2021-27424: GE UR family exposure of sensitive information to an unauthorized actor

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-03-23 · updated 2026-06-17
• Weakness: CWE-200

Description

GE UR firmware versions prior to version 8.1x shares MODBUS memory map as part of the communications guide. GE was made aware a “Last-key pressed” MODBUS register can be used to gain unauthorized information.

Affected products

• GE Multilin B30 Firmware: before 8.10 — fixed in 8.10
• GE Multilin B90 Firmware: before 8.10 — fixed in 8.10
• GE Multilin C30 Firmware: before 8.10 — fixed in 8.10
• GE Multilin C60 Firmware: before 8.10 — fixed in 8.10
• GE Multilin C70 Firmware: before 8.10 — fixed in 8.10
• GE Multilin C95 Firmware: before 8.10 — fixed in 8.10
• GE Multilin D30 Firmware: before 8.10 — fixed in 8.10
• GE Multilin D60 Firmware: before 8.10 — fixed in 8.10
• GE Multilin F35 Firmware: before 8.10 — fixed in 8.10
• GE Multilin F60 Firmware: before 8.10 — fixed in 8.10
• GE Multilin G30 Firmware: before 8.10 — fixed in 8.10
• GE Multilin G60 Firmware: before 8.10 — fixed in 8.10
• GE Multilin L30 Firmware: before 8.10 — fixed in 8.10
• GE Multilin L60 Firmware: before 8.10 — fixed in 8.10
• GE Multilin L90 Firmware: before 8.10 — fixed in 8.10
• GE Multilin M60 Firmware: before 8.10 — fixed in 8.10
• GE Multilin N60 Firmware: before 8.10 — fixed in 8.10
• GE Multilin T35 Firmware: before 8.10 — fixed in 8.10
• GE Multilin T60 Firmware: before 8.10 — fixed in 8.10

How to fix

Upgrade to a fixed version: GE Multilin B30 Firmware 8.10; GE Multilin B90 Firmware 8.10; GE Multilin C30 Firmware 8.10; GE Multilin C60 Firmware 8.10; GE Multilin C70 Firmware 8.10; GE Multilin C95 Firmware 8.10; GE Multilin D30 Firmware 8.10; GE Multilin D60 Firmware 8.10; GE Multilin F35 Firmware 8.10; GE Multilin F60 Firmware 8.10; GE Multilin G30 Firmware 8.10; GE Multilin G60 Firmware 8.10. Check the vendor advisory for mitigations.

References

• https://www.cisa.gov/uscert/ics/advisories/icsa-21-075-02
• https://www.gegridsolutions.com/Passport/Login.aspx
• https://www.cisa.gov/uscert/ics/advisories/icsa-21-075-02
• https://www.gegridsolutions.com/Passport/Login.aspx

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