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VulnerabilityPublished Updated

CVE-2025-42966: SAP NetWeaver (XML Data Archiving Service) · Deserialization of Untrusted Data

Affects SAP NetWeaver (XML Data Archiving Service)Source CVE Database V5

0

Not known to be exploited · CVSS 9.1 Critical.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score
9.1Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.7% chance of exploitation in 30 days – higher than 53% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Jul 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

AI-suggested

  1. Monitor SAP's official channels closely for patches addressing CVE-2025-42966 and apply them immediately upon release.
  2. Restrict administrative access to the SAP NetWeaver XML Data Archiving Service to the minimum number of trusted personnel and enforce strong authentication mechanisms such as multi-factor authentication.
  3. Implement network segmentation and firewall rules to limit access to the archiving service only from authorized management systems.
  4. Enable detailed logging and continuous monitoring of administrative actions and serialized object handling to detect anomalous or suspicious activity.
  5. Conduct regular audits of administrative accounts and privileges to prevent unauthorized escalation.
  6. Consider deploying runtime application self-protection (RASP) or Java security managers to detect and block malicious deserialization attempts.
  7. Educate administrators about the risks of insecure deserialization and the importance of safeguarding serialized data inputs.
  8. If feasible, implement input validation or deserialization filters to reject unexpected or malformed serialized objects.
  9. Prepare incident response plans specifically addressing potential exploitation scenarios involving deserialization vulnerabilities in SAP environments.

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.

References

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