How severe is CVE-2026-27842?

CVE-2026-27842 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-27842 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-27842?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-27842 have an EU (EUVD) identifier?

Yes. CVE-2026-27842 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11101.

When was CVE-2026-27842 published?

CVE-2026-27842 was published on 2026-03-11 and last updated on 2026-06-17.

CVE-2026-27842

CVE-2026-27842 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-288.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-11101
Weakness: CWE-288
Published: 2026-03-11
Last modified: 2026-06-17

Description

Authentication bypass issue exists in MR-GM5L-S1 and MR-GM5A-L1, which may allow an attacker to bypass authentication and change the device configuration.

Frequently asked questions

What is CVE-2026-27842?: Authentication bypass issue exists in MR-GM5L-S1 and MR-GM5A-L1, which may allow an attacker to bypass authentication and change the device configuration.
How severe is CVE-2026-27842?: CVE-2026-27842 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-27842 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-27842?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-27842 have an EU (EUVD) identifier?: Yes. CVE-2026-27842 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11101.
When was CVE-2026-27842 published?: CVE-2026-27842 was published on 2026-03-11 and last updated on 2026-06-17.

References

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