How severe is CVE-2026-4827?

CVE-2026-4827 has a CVSS 4.0 base score of 8.7, rated high severity.

Is CVE-2026-4827 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-4827?

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

Does CVE-2026-4827 have an EU (EUVD) identifier?

Yes. CVE-2026-4827 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29459.

When was CVE-2026-4827 published?

CVE-2026-4827 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-4827

CVE-2026-4827 is a high-severity vulnerability with a CVSS 4.0 base score of 8.7. 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-331.

Key facts

Severity: High (CVSS 4.0 base score 8.7)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29459
Weakness: CWE-331
Published: 2026-05-12
Last modified: 2026-06-17

Description

CWE‑331: Insufficient Entropy vulnerability exists that could lead to unauthorized access when an attacker on the network can exploit weaknesses in session‑management protections.

Frequently asked questions

What is CVE-2026-4827?: CWE‑331: Insufficient Entropy vulnerability exists that could lead to unauthorized access when an attacker on the network can exploit weaknesses in session‑management protections.
How severe is CVE-2026-4827?: CVE-2026-4827 has a CVSS 4.0 base score of 8.7, rated high severity.
Is CVE-2026-4827 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-4827?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-4827 have an EU (EUVD) identifier?: Yes. CVE-2026-4827 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29459.
When was CVE-2026-4827 published?: CVE-2026-4827 was published on 2026-05-12 and last updated on 2026-06-17.

References

https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2026-132-02&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2026-132-02.pdf

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