How severe is CVE-2026-8797?

CVE-2026-8797 has a CVSS 4.0 base score of 8.5, rated high severity.

Is CVE-2026-8797 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-8797?

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-2026-8797 have an EU (EUVD) identifier?

Yes. CVE-2026-8797 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39623.

When was CVE-2026-8797 published?

CVE-2026-8797 was published on 2026-06-26.

CVE-2026-8797

CVE-2026-8797 is a high-severity vulnerability with a CVSS 4.0 base score of 8.5. 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-782.

Key facts

Severity: High (CVSS 4.0 base score 8.5)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39623
Weakness: CWE-782
Published: 2026-06-26
Last modified: 2026-06-26

Description

An access control deficiency vulnerability exists in ExpressUpdate Agent for Windows. If a malicious user gains access to the product, arbitrary code could be executed with SYSTEM privileges.

Frequently asked questions

What is CVE-2026-8797?: An access control deficiency vulnerability exists in ExpressUpdate Agent for Windows. If a malicious user gains access to the product, arbitrary code could be executed with SYSTEM privileges.
How severe is CVE-2026-8797?: CVE-2026-8797 has a CVSS 4.0 base score of 8.5, rated high severity.
Is CVE-2026-8797 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-8797?: 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-2026-8797 have an EU (EUVD) identifier?: Yes. CVE-2026-8797 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39623.
When was CVE-2026-8797 published?: CVE-2026-8797 was published on 2026-06-26.

References

https://jpn.nec.com/security-info/secinfo/nv26-004_en.html

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