How severe is CVE-2025-52435?

CVE-2025-52435 has a CVSS 3.x base score of 7.5, 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-2025-52435 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-52435?

CVE-2025-52435 affects Apache Nimble. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-52435?

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-2025-52435 have an EU (EUVD) identifier?

Yes. CVE-2025-52435 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1854.

When was CVE-2025-52435 published?

CVE-2025-52435 was published on 2026-01-10 and last updated on 2026-06-17.

CVE-2025-52435

CVE-2025-52435 is a high-severity vulnerability in Apache Nimble with a CVSS 3.x base score of 7.5. 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-5.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1854
Weakness: CWE-5
Affected product: Apache Nimble
Published: 2026-01-10
Last modified: 2026-06-17

Description

J2EE Misconfiguration: Data Transmission Without Encryption vulnerability in Apache NimBLE. Improper handling of Pause Encryption procedure on Link Layer results in a previously encrypted connection being left in un-encrypted state allowing an eavesdropper to observe the remainder of the exchange. This issue affects Apache NimBLE: through <= 1.8.0. Users are recommended to upgrade to version 1.9.0, which fixes the issue.

Frequently asked questions

What is CVE-2025-52435?: J2EE Misconfiguration: Data Transmission Without Encryption vulnerability in Apache NimBLE. Improper handling of Pause Encryption procedure on Link Layer results in a previously encrypted connection being left in un-encrypted state allowing an eavesdropper to observe the remainder of the exchange. This issue affects Apache NimBLE: through <= 1.8.0. Users are recommended to upgrade to version 1.9.0, which fixes the issue.
How severe is CVE-2025-52435?: CVE-2025-52435 has a CVSS 3.x base score of 7.5, 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-2025-52435 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-52435?: CVE-2025-52435 affects Apache Nimble. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-52435?: 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-2025-52435 have an EU (EUVD) identifier?: Yes. CVE-2025-52435 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1854.
When was CVE-2025-52435 published?: CVE-2025-52435 was published on 2026-01-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:nimble:*:*:*:*:*:*:*:*

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