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CVE-2021-27420

GE UR family input validation

MEDIUM

5.3

CVSS Score

Published: March 23, 2022 at 07:46 PM UTC

Updated: June 17, 2026 at 03:44 AM UTC

39 products affected across 1 vendorMultilin L60 FirmwareMultilin F35 FirmwareMultilin D60 Firmware

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Severity

MEDIUM5.3

Exploit prediction

EPSS 1%

SSVC

No known exploit

Description

GE UR firmware versions prior to version 8.1x web server task does not properly handle receipt of unsupported HTTP verbs, resulting in the web server becoming temporarily unresponsive after receiving a series of unsupported HTTP requests. When unresponsive, the web server is inaccessible. By itself, this is not particularly significant as the relay remains effective in all other functionality and communication channels.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Multilin B30 Firmware · Ge

95%

v < 8.10

Affected range stops below 8.10, so it looks safe — our inference, not a vendor statement

ge-multilin-b30 (same device)

Multilin B90 Firmware · Ge

95%

v < 8.10

Affected range stops below 8.10, so it looks safe — our inference, not a vendor statement

ge-multilin-b90 (same device)

Multilin C30 Firmware · Ge

95%

v < 8.10

Affected range stops below 8.10, so it looks safe — our inference, not a vendor statement

ge-multilin-c30 (same device)

Multilin C60 Firmware · Ge

95%

v < 8.10

Affected range stops below 8.10, so it looks safe — our inference, not a vendor statement

ge-multilin-c60 (same device)

Multilin C70 Firmware · Ge

95%

v < 8.10

Affected range stops below 8.10, so it looks safe — our inference, not a vendor statement

ge-multilin-c70 (same device)

Multilin C95 Firmware · Ge

95%

v < 8.10

Affected range stops below 8.10, so it looks safe — our inference, not a vendor statement

ge-multilin-c95 (same device)

Multilin D30 Firmware · Ge

95%

v < 8.10

Affected range stops below 8.10, so it looks safe — our inference, not a vendor statement

ge-multilin-d30 (same device)

Multilin D60 Firmware · Ge

95%

v < 8.10

Affected range stops below 8.10, so it looks safe — our inference, not a vendor statement

ge-multilin-d60 (same device)

Multilin F35 Firmware · Ge

95%

v < 8.10

Affected range stops below 8.10, so it looks safe — our inference, not a vendor statement

ge-multilin-f35 (same device)

Multilin F60 Firmware · Ge

95%

v < 8.10

Affected range stops below 8.10, so it looks safe — our inference, not a vendor statement

ge-multilin-f60 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_CONFIRMMitigationThird Party AdvisoryUS Government Resource

Source: [email protected]

https://www.cisa.gov/uscert/ics/advisories/icsa-21-075-02

x_refsource_CONFIRMPermissions RequiredVendor Advisory

Source: [email protected]

https://www.gegridsolutions.com/Passport/Login.aspx

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMicscert

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: LOW

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-20

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