CVE-2021-27428 | GE UR family Unrestricted Upload of File with Dangerous Type

GE UR IED firmware versions prior to version 8.1x supports upgrading firmware using UR Setup configuration tool – Enervista UR Setup. This UR Setup tool validates the authenticity and integrity of firmware file before uploading the UR IED. An illegitimate user could upgrade firmware without appropriate privileges. The weakness is assessed, and mitigation is implemented in firmware Version 8.10.

Published: 2022-03-23 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-27428 is rated Moderate Risk (57.5/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.29%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-27428

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-18 0.24% 0.29% +0.04%
2 2025-11-21 0.29% 0.24% -0.04%
3 2025-11-18 — 0.29% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-27428

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2021-27428

Affected software / configurations for CVE-2021-27428

Vendor Product Version Raw CPE
ge multilin_b30_firmware < 8.10 cpe:2.3:o:ge:multilin_b30_firmware:*:*:*:*:*:*:*:*
ge multilin_b90_firmware < 8.10 cpe:2.3:o:ge:multilin_b90_firmware:*:*:*:*:*:*:*:*
ge multilin_c60_firmware < 8.10 cpe:2.3:o:ge:multilin_c60_firmware:*:*:*:*:*:*:*:*
ge multilin_c70_firmware < 8.10 cpe:2.3:o:ge:multilin_c70_firmware:*:*:*:*:*:*:*:*
ge multilin_c95_firmware < 8.10 cpe:2.3:o:ge:multilin_c95_firmware:*:*:*:*:*:*:*:*
ge multilin_d30_firmware < 8.10 cpe:2.3:o:ge:multilin_d30_firmware:*:*:*:*:*:*:*:*
ge multilin_d60_firmware < 8.10 cpe:2.3:o:ge:multilin_d60_firmware:*:*:*:*:*:*:*:*
ge multilin_f35_firmware < 8.10 cpe:2.3:o:ge:multilin_f35_firmware:*:*:*:*:*:*:*:*
ge multilin_f60_firmware < 8.10 cpe:2.3:o:ge:multilin_f60_firmware:*:*:*:*:*:*:*:*
ge multilin_g30_firmware < 8.10 cpe:2.3:o:ge:multilin_g30_firmware:*:*:*:*:*:*:*:*
ge multilin_g60_firmware < 8.10 cpe:2.3:o:ge:multilin_g60_firmware:*:*:*:*:*:*:*:*
ge multilin_l30_firmware < 8.10 cpe:2.3:o:ge:multilin_l30_firmware:*:*:*:*:*:*:*:*
ge multilin_l60_firmware < 8.10 cpe:2.3:o:ge:multilin_l60_firmware:*:*:*:*:*:*:*:*
ge multilin_l90_firmware < 8.10 cpe:2.3:o:ge:multilin_l90_firmware:*:*:*:*:*:*:*:*
ge multilin_m60_firmware < 8.10 cpe:2.3:o:ge:multilin_m60_firmware:*:*:*:*:*:*:*:*
ge multilin_n60_firmware < 8.10 cpe:2.3:o:ge:multilin_n60_firmware:*:*:*:*:*:*:*:*
ge multilin_t35_firmware < 8.10 cpe:2.3:o:ge:multilin_t35_firmware:*:*:*:*:*:*:*:*
ge multilin_t60_firmware < 8.10 cpe:2.3:o:ge:multilin_t60_firmware:*:*:*:*:*:*:*:*
ge multilin_c30_firmware < 8.10 cpe:2.3:o:ge:multilin_c30_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-27428

URL Tags
https://www.cisa.gov/uscert/ics/advisories/icsa-21-075-02 Mitigation Third Party Advisory US Government Resource
https://www.gegridsolutions.com/Passport/Login.aspx Permissions Required Vendor Advisory
cvelogic Threat Intelligence