SAP NetWeaver AS ABAP and ABAP Platform: Improper Verification of Cryptographic Signature
CVE-2026-23687 is a high-severity improper verification of cryptographic signature vulnerability in SAP NetWeaver AS ABAP and ABAP Platform from SAP, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected SAP NetWeaver AS ABAP and ABAP Platform versions: SAP_BASIS 700; SAP_BASIS 701; SAP_BASIS 702, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.5% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of SAP NetWeaver AS ABAP and ABAP Platform you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on url.sap for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| SAP | SAP NetWeaver AS ABAP and ABAP Platform | SAP_BASIS 700; SAP_BASIS 701; SAP_BASIS 702; SAP_BASIS 731; SAP_BASIS 740; SAP_BASIS 750; SAP_BASIS 751; SAP_BASIS 752; and 11 more ranges | Not stated |
| SAP | SAP Basis | 700; 701; 702; 731; 740; 750; 751; 752; and 10 more ranges | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (sap.com).
Official description
SAP NetWeaver Application Server ABAP and ABAP Platform allows an authenticated attacker with normal privileges to obtain a valid signed message and send modified signed XML documents to the verifier. This may result in acceptance of tampered identity information, unauthorized access to sensitive user data and potential disruption of normal system usage.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Verification of Cryptographic Signature
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
More Improper Verification of Cryptographic Signature vulnerabilities (CWE-347)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Other references
- me.sap.com/notes/3697567Permissions Required
- seclists.org/fulldisclosure/2026/Jun/1
Other vulnerabilities in SAP NetWeaver AS ABAP and ABAP Platform
- 7.1 High severity
- 9.9 Critical severity
- 9.8 Critical severity
- 8.8 High severity
- 7.4 High severity
Recent Improper Verification of Cryptographic Signature vulnerabilities
- 8.1 High severity
- 8.1 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
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