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CVE-2021-27424

20
FAUCET Score

CVE-2021-27424 is a medium-severity information disclosure vulnerability affecting GE UR firmware versions prior to 8.1x. An attacker can exploit a "Last-key pressed" MODBUS register, shared in the communications guide, to gain unauthorized information. This vulnerability has a CVSS score of 5.3, indicating a network-based attack with low complexity and no user interaction required, leading to a limited impact on confidentiality. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

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

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.86%
Probability of exploitation in next 30 days
EPSS Percentile
54.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0086 is in the 34th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 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