How severe is CVE-2026-20893?

CVE-2026-20893 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-20893 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-2026-20893?

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-2026-20893 have an EU (EUVD) identifier?

Yes. CVE-2026-20893 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1233.

When was CVE-2026-20893 published?

CVE-2026-20893 was published on 2026-01-07 and last updated on 2026-06-17.

CVE-2026-20893

CVE-2026-20893 is a high-severity vulnerability with a CVSS 3.x base score of 7.8. 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-346.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v4: 8.5
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1233
Weakness: CWE-346
Published: 2026-01-07
Last modified: 2026-06-17

Description

Origin validation error issue exists in Fujitsu Security Solution AuthConductor Client Basic V2 2.0.25.0 and earlier. If this vulnerability is exploited, an attacker who can log in to the Windows system where the affected product is installed may execute arbitrary code with SYSTEM privilege and/or modify the registry value.

Frequently asked questions

What is CVE-2026-20893?: Origin validation error issue exists in Fujitsu Security Solution AuthConductor Client Basic V2 2.0.25.0 and earlier. If this vulnerability is exploited, an attacker who can log in to the Windows system where the affected product is installed may execute arbitrary code with SYSTEM privilege and/or modify the registry value.
How severe is CVE-2026-20893?: CVE-2026-20893 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-20893 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-2026-20893?: 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-2026-20893 have an EU (EUVD) identifier?: Yes. CVE-2026-20893 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1233.
When was CVE-2026-20893 published?: CVE-2026-20893 was published on 2026-01-07 and last updated on 2026-06-17.

References

Other CWE-346 vulnerabilities

CVE-2026-42901 — Critical (CVSS 10.0): Origin validation error in Microsoft Entra ID allows an unauthorized attacker to elevate privileges over a network.
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