Critical Access control

CVE-2026-0509 — Missing Authorization check in SAP NetWeaver Application Server ABAP and ABAP Platform

SAP NetWeaver Application Server ABAP and ABAP Platform allows an authenticated, low-privileged user to perform background Remote Function Calls without the required S_RFC authorization in certain cases. This can result in a high impact on integrity and availability, and no impact on the confidentiality of the application.

Published Feb 10, 2026 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: sap

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.4% (30-day exploitation probability)+5
Technical severity (critical)+10

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.38%

ahead of 30% of scored CVEs · Oct 14, 2026

Affects

SAP SE

Netweaver As Abap Kernel and 3 more

CVSS base

9.6

Critical · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (SAP SE Netweaver As Abap Kernel, SAP SE Netweaver As Abap Krnl64nuc, SAP SE Netweaver As Abap Krnl64uc…).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (access control), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
SAP SE	Netweaver As Abap Kernel	version 7.53version 7.54version 7.77version 7.89version 7.93version 9.16version 9.18version 9.19 and 1 more version 7.22	Vulnerable	NIST National Vulnerability Database
SAP SE	Netweaver As Abap Krnl64nuc	version 7.22version 7.22ext	Vulnerable	NIST National Vulnerability Database
SAP SE	Netweaver As Abap Krnl64uc	version 7.53version 7.22extversion 7.22	Vulnerable	NIST National Vulnerability Database
SAP SE	SAP NetWeaver Application Server ABAP and ABAP Platform	version KRNL64NUC 7.22version 7.22EXTversion KRNL64UC 7.22version 7.53version KERNEL 7.22version 7.54version 7.77version 7.89 and 4 more version 7.93version 9.16version 9.18version 9.19	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Changed

Confidentiality

None

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
9.6	CVSS 3.1	Critical	3.1	5.8	cna@sap.com via NIST National Vulnerability Database
9.6	CVSS 3.1	Critical	—	—	sap via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H (score shown at the top: cna@sap.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-862 · Missing Authorization

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.38%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Audit administrative actions and access to resources outside each user’s normal pattern.

web/proxy/WAF logsnetwork IDS/IPSauthentication logsapplication logs

Timeline

What happened to this CVE, newest first.

2026
Affected products added · sap se/sap netweaver application server abap and abap platform
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
CVSS changed · 9.6
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Analyzed
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
CVE published
Feb 10, 2026 · sap

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

2 on the record

url.sap/sapsecuritypatchday
Vendor Advisory, NIST National Vulnerability Database
me.sap.com/notes/3674774
Permissions Required, NIST National Vulnerability Database

Elsewhere on this site

SAP SE
every CVE for this vendor

Access control
same class

CWE-862
other pages naming this weakness

Related CVEs (same products)

Low CVE-2026-24320 Memory Corruption vulnerability in SAP NetWeaver and ABAP Platform (Application Server ABAP) Feb 10, 2026
High CVE-2026-0506 Missing Authorization check in SAP NetWeaver Application Server ABAP and ABAP Platform Jan 12, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-0509 is "Missing Authorization check in SAP NetWeaver Application Server ABAP and ABAP Platform", rated Critical. It affects Netweaver As Abap Kernel (SAP SE); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 9.6 describes technical severity. EPSS 0.38% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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