How severe is CVE-2025-42966?

CVE-2025-42966 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-42966 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-42966?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-42966 have an EU (EUVD) identifier?

Yes. CVE-2025-42966 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-20343.

When was CVE-2025-42966 published?

CVE-2025-42966 was published on 2025-07-08 and last updated on 2026-06-17.

CVE-2025-42966

CVE-2025-42966 is a critical-severity vulnerability with a CVSS 3.x base score of 9.1. 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-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-20343
Weakness: CWE-502
Published: 2025-07-08
Last modified: 2026-06-17

Description

SAP NetWeaver XML Data Archiving Service allows an authenticated attacker with administrative privileges to exploit an insecure Java deserialization vulnerability by sending a specially crafted serialized Java object. This could lead to high impact on confidentiality, integrity, and availability of the application.

Frequently asked questions

What is CVE-2025-42966?: SAP NetWeaver XML Data Archiving Service allows an authenticated attacker with administrative privileges to exploit an insecure Java deserialization vulnerability by sending a specially crafted serialized Java object. This could lead to high impact on confidentiality, integrity, and availability of the application.
How severe is CVE-2025-42966?: CVE-2025-42966 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-42966 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-42966?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-42966 have an EU (EUVD) identifier?: Yes. CVE-2025-42966 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-20343.
When was CVE-2025-42966 published?: CVE-2025-42966 was published on 2025-07-08 and last updated on 2026-06-17.

References

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