CVE-2026-27671Network attack vector

Unauthenticated application compromise via crafted RFC requests

Published Jun 9, 2026 · Updated Jun 9, 2026

Memory corruption in the SAP Kernel allows remote attackers to compromise SAP NetWeaver and ABAP Platform via crafted RFC requests. The RFC protocol parser accepts malformed request data and triggers logical errors in kernel memory management, causing a stack-based buffer overflow. No authentication or user interaction is required, and successful exploitation can disclose or alter application data or interrupt service.

CVSS severity9.8
Critical
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the SAP Kernel allows remote attackers to compromise SAP NetWeaver and ABAP Platform via crafted RFC requests. The RFC protocol parser accepts malformed request data and triggers logical errors in kernel memory management, causing a stack-based buffer overflow. No authentication or user interaction is required, and successful exploitation can disclose or alter application data or interrupt service.

The record

CVE
CVE-2026-27671
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
cap-js
Product
SAP NetWeaver and ABAP Platform
Classifications
CWE-121, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=722EXT
  2. Affected versionversion=7.22EXT
  3. Affected versionversion=7.53
  4. Affected versionversion=7.54
  5. Affected versionversion=7.77
  6. Affected versionversion=7.89
  7. Affected versionversion=7.93
  8. Affected versionversion=9.16
  9. Affected versionversion=9.18
  10. Affected versionversion=91.9
  11. Affected versionversion=KERNEL 7.22
  12. Affected versionversion=KRNL64NUC 7.22
  13. Affected versionversion=KRNL64UC 7.22

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

cap-js · SAP NetWeaver and ABAP Platformversion=722EXT; version=7.22EXT; version=7.53; version=7.54; version=7.77; version=7.89; version=7.93; version=9.16; version=9.18; version=91.9; version=KERNEL 7.22; version=KRNL64NUC 7.22; version=KRNL64UC 7.22

Published CVSS scores

9.8SAP SECVSS:3.1/AV:N/AC:L/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-121Stack-based Buffer Overflow
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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