How severe is CVE-2025-35940?

CVE-2025-35940 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-35940 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-35940?

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-2025-35940 have an EU (EUVD) identifier?

Yes. CVE-2025-35940 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-17816.

When was CVE-2025-35940 published?

CVE-2025-35940 was published on 2025-06-10 and last updated on 2026-06-17.

CVE-2025-35940

CVE-2025-35940 is a high-severity vulnerability with a CVSS 3.x base score of 8.1. 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-798.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-17816
Weakness: CWE-798
Published: 2025-06-10
Last modified: 2026-06-17

Description

The ArchiverSpaApi ASP.NET application uses a hard-coded JWT signing key. An unauthenticated remote attacker can generate and use a verifiable JWT token to access protected ArchiverSpaApi URL endpoints.

Frequently asked questions

What is CVE-2025-35940?: The ArchiverSpaApi ASP.NET application uses a hard-coded JWT signing key. An unauthenticated remote attacker can generate and use a verifiable JWT token to access protected ArchiverSpaApi URL endpoints.
How severe is CVE-2025-35940?: CVE-2025-35940 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-35940 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-35940?: 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-2025-35940 have an EU (EUVD) identifier?: Yes. CVE-2025-35940 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-17816.
When was CVE-2025-35940 published?: CVE-2025-35940 was published on 2025-06-10 and last updated on 2026-06-17.

References

https://www.tenable.com/security/research/tra-2025-17

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