How severe is CVE-2026-27766?

CVE-2026-27766 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-27766 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-27766?

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

Does CVE-2026-27766 have an EU (EUVD) identifier?

Yes. CVE-2026-27766 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30830.

When was CVE-2026-27766 published?

CVE-2026-27766 was published on 2026-05-19 and last updated on 2026-06-17.

CVE-2026-27766

CVE-2026-27766 is a medium-severity vulnerability with a CVSS 3.x base score of 5.5. 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-364.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30830
Weakness: CWE-364
Published: 2026-05-19
Last modified: 2026-06-17

Description

in OpenHarmony v6.0 and prior versions allow a local attacker cause information leak.

Frequently asked questions

What is CVE-2026-27766?: in OpenHarmony v6.0 and prior versions allow a local attacker cause information leak.
How severe is CVE-2026-27766?: CVE-2026-27766 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-27766 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-27766?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27766 have an EU (EUVD) identifier?: Yes. CVE-2026-27766 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30830.
When was CVE-2026-27766 published?: CVE-2026-27766 was published on 2026-05-19 and last updated on 2026-06-17.

References

https://gitcode.com/openharmony/security/tree/master/zh/security-disclosure/2026/2026-05.md

Other CWE-364 vulnerabilities

CVE-2026-24792 — High (CVSS 8.1): in OpenHarmony v6.0 and prior versions allow a remote attacker arbitrary code execution in pre-installed apps.
CVE-2024-6409 — High (CVSS 7.0): A race condition vulnerability was discovered in how signals are handled by OpenSSH's server (sshd). If a remote…
CVE-2026-42002 — Medium (CVSS 5.9): Concurrency and locking defects in GSS-TSIG
CVE-2020-14317 — Medium (CVSS 5.5): It was found that the issue for security flaw CVE-2019-3805 appeared again in a further version of JBoss Enterprise…
CVE-1999-0035 — Medium (CVSS 5.4): Race condition in signal handling routine in ftpd, allowing read/write arbitrary files.
CVE-2025-4598 — Medium (CVSS 4.7): A vulnerability was found in systemd-coredump. This flaw allows an attacker to force a SUID process to crash and…

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