CVE-2025-42959Network attack vector

System compromise via cross-system HMAC credential replay

Published Jul 8, 2025 · Updated Feb 26, 2026

Missing authentication in SAP NetWeaver AS ABAP and ABAP Platform allows remote attackers to compromise systems by replaying an HMAC credential. The authentication path accepts a credential taken from a system lacking Security Notes 3007182 and 3537476 on a different system instead of rejecting the cross-system replay. Exploitation requires obtaining the credential from an incompletely patched source system; successful replay grants complete control of the target.

CVSS severity8.1
High
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in SAP NetWeaver AS ABAP and ABAP Platform allows remote attackers to compromise systems by replaying an HMAC credential. The authentication path accepts a credential taken from a system lacking Security Notes 3007182 and 3537476 on a different system instead of rejecting the cross-system replay. Exploitation requires obtaining the credential from an incompletely patched source system; successful replay grants complete control of the target.

The record

CVE
CVE-2025-42959
Published
Jul 8, 2025
Updated
Feb 26, 2026
Vendor
SAP SE
Product
SAP NetWeaver Application Server ABAP / ABAP Platform
Classifications
CWE-308, T1550
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=SAP_BASIS 700
  2. Affected versionversion=SAP_BASIS 701
  3. Affected versionversion=SAP_BASIS 702
  4. Affected versionversion=SAP_BASIS 731
  5. Affected versionversion=SAP_BASIS 740
  6. Affected versionversion=SAP_BASIS 750
  7. Affected versionversion=SAP_BASIS 751
  8. Affected versionversion=SAP_BASIS 752
  9. Affected versionversion=SAP_BASIS 753
  10. Affected versionversion=SAP_BASIS 754
  11. Affected versionversion=SAP_BASIS 755
  12. Affected versionversion=SAP_BASIS 756
  13. Affected versionversion=SAP_BASIS 757
  14. Affected versionversion=SAP_BASIS 758
  15. Affected versionversion=SAP_BASIS 914
  16. Affected versionversion=SAP_BASIS 915

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SAP SE · SAP NetWeaver Application Server ABAP / ABAP Platformversion=SAP_BASIS 700; version=SAP_BASIS 701; version=SAP_BASIS 702; version=SAP_BASIS 731; version=SAP_BASIS 740; version=SAP_BASIS 750; version=SAP_BASIS 751; version=SAP_BASIS 752; version=SAP_BASIS 753; version=SAP_BASIS 754; version=SAP_BASIS 755; version=SAP_BASIS 756; version=SAP_BASIS 757; version=SAP_BASIS 758; version=SAP_BASIS 914; version=SAP_BASIS 915

Published CVSS scores

8.1SAP SECVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-308Use of Single-factor Authentication
T1550Use Alternate Authentication Material

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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