How severe is CVE-2025-66698?

CVE-2025-66698 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-66698 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66698?

CVE-2025-66698 affects Semantic-machines Veda. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66698?

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-2025-66698 have an EU (EUVD) identifier?

Yes. CVE-2025-66698 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2335.

When was CVE-2025-66698 published?

CVE-2025-66698 was published on 2026-01-13 and last updated on 2026-07-05.

CVE-2025-66698

CVE-2025-66698 is a high-severity vulnerability in Semantic-machines Veda with a CVSS 3.x base score of 8.6. 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-287.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2335
Weakness: CWE-287
Affected product: Semantic-machines Veda
Published: 2026-01-13
Last modified: 2026-07-05

Description

An issue in Semantic machines v5.4.8 allows attackers to bypass authentication via sending a crafted HTTP request to various API endpoints.

Frequently asked questions

What is CVE-2025-66698?: An issue in Semantic machines v5.4.8 allows attackers to bypass authentication via sending a crafted HTTP request to various API endpoints.
How severe is CVE-2025-66698?: CVE-2025-66698 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-66698 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66698?: CVE-2025-66698 affects Semantic-machines Veda. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66698?: 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-2025-66698 have an EU (EUVD) identifier?: Yes. CVE-2025-66698 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2335.
When was CVE-2025-66698 published?: CVE-2025-66698 was published on 2026-01-13 and last updated on 2026-07-05.

References

https://github.com/Perunchess/CVE-2025-66698

EU advisories (EUVD)

Affected products (1)

cpe:2.3:a:semantic-machines:veda:5.4.8:*:*:*:*:*:*:*

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