How severe is CVE-2026-26289?

CVE-2026-26289 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.

Is CVE-2026-26289 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-26289?

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-2026-26289 have an EU (EUVD) identifier?

Yes. CVE-2026-26289 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29828.

When was CVE-2026-26289 published?

CVE-2026-26289 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-26289

CVE-2026-26289 is a high-severity vulnerability with a CVSS 3.x base score of 8.2. 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-863.

Key facts

Severity: High (CVSS 3.x base score 8.2)
CVSS v4: 8.4
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29828
Weakness: CWE-863
Published: 2026-05-12
Last modified: 2026-06-17

Description

PowerSYSTEM Center REST API endpoint for device account export allows an authenticated user with limited permissions to expose sensitive information normally restricted to administrative permissions only.

Frequently asked questions

What is CVE-2026-26289?: PowerSYSTEM Center REST API endpoint for device account export allows an authenticated user with limited permissions to expose sensitive information normally restricted to administrative permissions only.
How severe is CVE-2026-26289?: CVE-2026-26289 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.
Is CVE-2026-26289 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-26289?: 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-2026-26289 have an EU (EUVD) identifier?: Yes. CVE-2026-26289 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29828.
When was CVE-2026-26289 published?: CVE-2026-26289 was published on 2026-05-12 and last updated on 2026-06-17.

References

Other CWE-863 (Incorrect Authorization) vulnerabilities

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CVE-2026-33105 — Critical (CVSS 10.0): Improper authorization in Microsoft Azure Kubernetes Service allows an unauthorized attacker to elevate privileges over…
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