CVE-2026-32291: The GL-iNet Comet (GL-RM1) KVM before 1.8.2 does not require authentication on the UART serial console

Q: How do I fix CVE-2026-32291?

comet gl-rm1 firmware: upgrade to 1.8.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-32291 being exploited?

CVE-2026-32291 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-32291 affect?

CVE-2026-32291 affects comet gl-rm1 firmware. Severity is medium (CVSS 6.8). The GL-iNet Comet (GL-RM1) KVM before 1.8.2 does not require authentication on the UART serial console. This attack requires physically opening the device and connecting to the UART pins.

Q: How urgent is CVE-2026-32291?

Priority 31/100. No elevated risk signals yet.

Routine

MEDIUM 6.8UPGRADE

CVE-2026-32291 is a medium-severity flaw (CVSS 6.8) affecting comet gl-rm1 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The GL-iNet Comet (GL-RM1) KVM before 1.8.2 does not require authentication on the UART serial console. This attack requires physically opening the device and connecting to the UART pins.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Physical
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Weakness	CWE-306
Published	2026-03-17
Last modified	2026-06-17

Publisher (CNA): Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government · Vendor: gl-inet

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

Am I affected?

Timeline

2026-03-17 18:16 UTCPublished CVE record published
2026-06-17 10:35 UTCUpdated Record last modified

gl-inet comet gl-rm1 firmware UPGRADE

Affected: < 1.8.2

Fixed in: 1.8.2

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2026-32291?

comet gl-rm1 firmware: upgrade to 1.8.2. Exact commands for each OS are on this page.

Is CVE-2026-32291 being exploited?

CVE-2026-32291 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-2026-32291 affect?

CVE-2026-32291 affects comet gl-rm1 firmware. Severity is medium (CVSS 6.8). The GL-iNet Comet (GL-RM1) KVM before 1.8.2 does not require authentication on the UART serial console. This attack requires physically opening the device and connecting to the UART pins.

How urgent is CVE-2026-32291?

Priority 31/100. No elevated risk signals yet.

Related CVEs

CVE-2026-32293 LOW 3.7 UPGRADE The GL-iNet Comet (GL-RM1) KVM connects to a GL-iNet site during boot-up to provision client and CA certificat
CVE-2026-32292 HIGH 7.5 UPGRADE The GL-iNet Comet (GL-RM1) KVM web interface does not limit login requests, enabling brute-force attempts to g
CVE-2026-32290 MEDIUM 4.7 UPGRADE The GL-iNet Comet (GL-RM1) KVM before version 1.8.2 does not sufficiently verify the authenticity of uploaded

References

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