CVE-2021-27430: GE UR bootloader binary Version 7.00, 7.01 and 7.02 included unused hardcoded credentials

Routine

HIGH 8.4DOWNGRADE

CVE-2021-27430 is a high-severity flaw (CVSS 8.4) affecting ur bootloader binary. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

GE UR bootloader binary Version 7.00, 7.01 and 7.02 included unused hardcoded credentials. Additionally, a user with physical access to the UR IED can interrupt the boot sequence by rebooting the UR.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.4 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-798
Published	2022-03-23
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: ge

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-03-23 20:15 UTCPublished CVE record published
2026-06-17 03:44 UTCUpdated Record last modified

ge ur bootloader binary DOWNGRADE

Affected: 7.00 · 7.01 · 7.02

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.00

1. Check installed version

apt-cache policy ur-bootloader-binary || rpm -q ur-bootloader-binary || ur-bootloader-binary --version

2. No fixed release: DOWNGRADE to a release before 7.00 (Debian / Ubuntu)

apt-cache madison ur-bootloader-binary sudo apt install ur-bootloader-binary=<VERSION_BEFORE_7.00> sudo apt-mark hold ur-bootloader-binary

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ur-bootloader-binary sudo dnf downgrade ur-bootloader-binary-<VERSION_BEFORE_7.00> sudo dnf versionlock add ur-bootloader-binary

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-27430?

ur bootloader binary: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-27430 being exploited?

CVE-2021-27430 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-27430 affect?

CVE-2021-27430 affects ur bootloader binary. Severity is high (CVSS 8.4). GE UR bootloader binary Version 7.00, 7.01 and 7.02 included unused hardcoded credentials. Additionally, a user with physical access to the UR IED can interrupt the boot sequence by rebooting the UR.

How urgent is CVE-2021-27430?

Priority 33/100. High severity

References

← Back to latest CVEs