Threat Intelligence / CVE / CVE-2026-40128

CVE-2026-40128 — SAP_SE SAP NetWeaver Application Server Java (Web Container)

CVSS v3.1 9 (CRITICAL) · EPSS 0.4% (higher than 36.4% of all scored CVEs) · Priority 6/10 · Published 2026-06-09

As of 2026-06-10, CVE-2026-40128 is a CRITICAL-severity vulnerability in SAP_SE SAP NetWeaver Application Server Java (Web Container), CVSS v3.1 9, EPSS 0.4% (36.4th percentile). Threadlinqs Intelligence links 3 tracked threat campaigns to CVE-2026-40128, most recently “CVE-2026-44747: Critical Memory Corruption in SAP NetWeaver Application Server ABAP (CVSS 9.9)”.

Last updated: 2026-06-10

What is CVE-2026-40128?

SAP NetWeaver Application Server Java (Web Container) allows an unauthenticated attacker to craft a malicious HTTP logon request that manipulates file inclusion parameters, enabling path traversal and processing of the included file. Processing the included file could allow the attacker to view or modify sensitive information or render any part of the local system unavailable.

The record classifies CVE-2026-40128 under weakness class CWE-35. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 95 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 9 — CRITICAL
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS (FIRST): 0.4% probability of exploitation in the next 30 days, higher than 36.4% of all scored CVEs
CISA KEV: Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority: 6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published: 2026-06-09, last modified 2026-06-10

Is CVE-2026-40128 being exploited?

No public exploitation evidence for CVE-2026-40128 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-06-10. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

Affected products and versions

SAP_SE: SAP NetWeaver Application Server Java (Web Container)

How to fix CVE-2026-40128

No vendor patch reference has been recorded for CVE-2026-40128 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-40128

3 tracked threats in the Threadlinqs corpus reference CVE-2026-40128, either in the campaign’s CVE list or as an indicator on the campaign record.

CVE-2026-44747: Critical Memory Corruption in SAP NetWeaver Application Server ABAP (CVSS 9.9) — CRITICAL · 2026-07-17
SAP Patches Critical NetWeaver, Approuter, and Commerce Cloud Flaws (CVE-2026-44747, CVE-2026-27690, CVE-2026-44761) — CRITICAL · 2026-07-14
SAP July 2026 Patch Day: Critical Memory Corruption in NetWeaver ABAP (CVE-2026-44747, CVSS 9.9) Among 16 Security Notes — CRITICAL · 2026-07-14

Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-07-14. This product uses the NVD API but is not endorsed or certified by the NVD.

Other references

Full detection coverage & IOCs for threats exploiting CVE-2026-40128 are available via the Threadlinqs MCP server (Purple tier). View plans →

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