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CVE-2021-27426

31
FAUCET Score

CVE-2021-27426 describes a critical vulnerability in GE UR IED firmware versions prior to 8.1x with the "Basic" security variant, where the "Factory Mode" cannot be disabled. This flaw allows an unauthenticated attacker to gain full control over the device, leading to complete compromise of confidentiality, integrity, and availability. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low attack complexity and no user interaction required. While there is no evidence of active exploitation or public exploit code, the vulnerability has garnered significant community discussion, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
< 8.10CPE matchmatch criteria
cpe:2.3:o:ge:multilin_b30_firmware:*:*:*:*:*:*:*:*
< 8.10CPE matchmatch criteria
cpe:2.3:o:ge:multilin_b90_firmware:*:*:*:*:*:*:*:*
< 8.10CPE matchmatch criteria
cpe:2.3:o:ge:multilin_c60_firmware:*:*:*:*:*:*:*:*
< 8.10CPE matchmatch criteria
cpe:2.3:o:ge:multilin_c70_firmware:*:*:*:*:*:*:*:*
< 8.10CPE matchmatch criteria
cpe:2.3:o:ge:multilin_c95_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.19%
Probability of exploitation in next 30 days
EPSS Percentile
64.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0119 is in the 51st percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / uscert/ics/advisories/icsa-21-075-02
MitigationThird Party AdvisoryUS Government Resource
gegridsolutions.com / Passport/Login.aspx
Permissions RequiredVendor Advisory