CVE-2021-27418 | GE UR family input validation

GE UR firmware versions prior to version 8.1x supports web interface with read-only access. The device fails to properly validate user input, making it possible to perform cross-site scripting attacks, which may be used to send a malicious script. Also, UR Firmware web server does not perform HTML encoding of user-supplied strings.

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-2021-27418 is rated Low Risk (34.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.19%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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-2021-27418

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 2025-04-10 0.05% 0.19% +0.14%
2 2023-03-07 0.89% 0.05% -0.83%
3 2022-03-24 — 0.89% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-27418

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N 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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]
6.1 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N 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:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 2.7 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2021-27418

Affected software / configurations for CVE-2021-27418

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-2021-27418

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