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Fencer Intel
medium 6.4

CVE-2026-109805 json

Weak Cryptography in SAP NetWeaver and ABAP Platform (Application Server ABAP)

published 2d ago modified yesterday also EUVD-2026-120703

cvss
6.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits
0
none known

Summary

Due to a weak HMAC cryptography calculation when receiving an RFC callback in SAP NetWeaver and ABAP Platform (Application Server ABAP), an authenticated attacker with high privileges and access to a network segment between application servers on an SAP system could intercept network communication between application servers and change the identity of the caller, enabling the execution of unauthorized function calls on the target server with escalated privileges leading to High impact on Confidentiality, Integrity, and Availability of the application.

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2d ago

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 6.4 CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

  • SAP_SE SAP NetWeaver and ABAP Platform (Application Server ABAP)

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.