How severe is CVE-2021-27424?

CVE-2021-27424 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-27424 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27424?

CVE-2021-27424 primarily affects Ge Multilin B30 Firmware. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-27424?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-27424 published?

CVE-2021-27424 was published on 2022-03-23 and last updated on 2026-06-17.

CVE-2021-27424

CVE-2021-27424 is a medium-severity vulnerability in Ge Multilin B30 Firmware with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-668.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-668
Affected product: Ge Multilin B30 Firmware
Published: 2022-03-23
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-27424?: 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.
How severe is CVE-2021-27424?: CVE-2021-27424 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-27424 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27424?: CVE-2021-27424 primarily affects Ge Multilin B30 Firmware. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-27424?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-27424 published?: CVE-2021-27424 was published on 2022-03-23 and last updated on 2026-06-17.

References

Affected products (19)

cpe:2.3:o:ge:multilin_b30_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_b90_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_c60_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_c70_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_c95_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_d30_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_d60_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_f35_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_f60_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_g30_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_g60_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_l30_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_l60_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_l90_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_m60_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_n60_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_t35_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_t60_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ge:multilin_c30_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Ge Multilin B30 Firmware

CVE-2021-27428 — Critical (CVSS 9.8): GE UR IED firmware versions prior to version 8.1x supports upgrading firmware using UR Setup configuration tool –…
CVE-2021-27426 — Critical (CVSS 9.8): GE UR IED firmware versions prior to version 8.1x with “Basic” security variant does not allow the disabling of the…
CVE-2021-27422 — High (CVSS 7.5): GE UR firmware versions prior to version 8.1x web server interface is supported on UR over HTTP protocol. It allows…
CVE-2021-27420 — Medium (CVSS 5.3): GE UR firmware versions prior to version 8.1x web server task does not properly handle receipt of unsupported HTTP…
CVE-2021-27418 — Medium (CVSS 5.3): GE UR firmware versions prior to version 8.1x supports web interface with read-only access. The device fails to…

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