How severe is CVE-2026-10831?

CVE-2026-10831 has a CVSS 4.0 base score of 6.9, rated medium severity.

Is CVE-2026-10831 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-10831?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-10831 have an EU (EUVD) identifier?

Yes. CVE-2026-10831 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37119.

When was CVE-2026-10831 published?

CVE-2026-10831 was published on 2026-06-16 and last updated on 2026-06-17.

CVE-2026-10831

CVE-2026-10831 is a medium-severity vulnerability with a CVSS 4.0 base score of 6.9. 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-862.

Key facts

Severity: Medium (CVSS 4.0 base score 6.9)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37119
Weakness: CWE-862
Published: 2026-06-16
Last modified: 2026-06-17

Description

A denial-of-service vulnerability exists in NPort devices because of improper access control on the command port. The command interface does not properly validate whether a sender is associated with a valid data port session before accepting break signal commands. A remote attacker with network access can send crafted requests to disrupt serial communication for an active user session.

Frequently asked questions

What is CVE-2026-10831?: A denial-of-service vulnerability exists in NPort devices because of improper access control on the command port. The command interface does not properly validate whether a sender is associated with a valid data port session before accepting break signal commands. A remote attacker with network access can send crafted requests to disrupt serial communication for an active user session.
How severe is CVE-2026-10831?: CVE-2026-10831 has a CVSS 4.0 base score of 6.9, rated medium severity.
Is CVE-2026-10831 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-10831?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-10831 have an EU (EUVD) identifier?: Yes. CVE-2026-10831 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37119.
When was CVE-2026-10831 published?: CVE-2026-10831 was published on 2026-06-16 and last updated on 2026-06-17.

References

https://www.moxa.com/en/support/product-support/security-advisory/mpsa-262370-cve-2026-10831-improper-authorization-vulnerability-in-serial-device-servers

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