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No exploitation reportedAwaiting NVD analysis

CVE-2026-109805

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

No exploitation reported by the sources we read.

  • Published2026-11-10
  • WeaknessCWE-328

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-11-1000:49CVE publishedCNA

Versions per branch

Products declared by the CNA

As sap, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • SAP_SE SAP NetWeaver and ABAP Platform (Application Server ABAP)other versions: not affected
    Affected
    • = KRNL64NUC 7.22no fix stated
    • = 7.22EXTno fix stated
    • = KRNL64UC 7.22no fix stated
    • = 7.53no fix stated
    • = KERNEL 7.22no fix stated
    • = 7.54no fix stated
    • = 7.77no fix stated
    • = 7.93no fix stated

    3 more version lines in the CVE record.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-10

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-109805 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE record2026-11-10
  • CNACVSS 3.16.42026-11-10
  • CNAweakness (CWE)CWE-3282026-11-10

Technical details

CVSS v3 Vector
CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Published
2026-11-10

Frequently asked questions

What is CVE-2026-109805?

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.

Is CVE-2026-109805 actively exploited?

Active exploitation of CVE-2026-109805 has not been confirmed.

What is the CVSS score for CVE-2026-109805?

CVE-2026-109805 has a CVSS v3 base score of 6.4 (MEDIUM severity), with vector string CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

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