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SAP S/4HANA

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SAP Patches Maximum Severity “Overpass” Flaw

Onapsis warns over 10,000 internet-facing SAP systems may be exposed to maximum-severity unauthenticated RCE flaw CVE-2026-44756 in SAP Extended Passport.

Onapsis Research Labs discovered CVE-2026-44756, a memory corruption flaw in SAP Extended Passport (EPP) processing caused by missing boundary validation during deserialization. The bug is reachable from the SAP GUI and RFC layers, is remotely exploitable without authentication by default, and could let attackers run arbitrary OS commands with SAP administrative privileges. No active exploitation was observed at publication. Onapsis also flagged critical S4GET bug CVE-2026-58240 (CVSS 9.8) in the S/4HANA Message Server, credential disclosure CVE-2026-76969 in SAP CAP, and improper access control CVE-2026-66768 in NetWeaver.

SAP Patches CVSS 10.0 Kernel Flaw Enabling Unauthenticated Remote Code Execution

SAP patched CVE-2026-44756 (CVSS 10.0), an unauthenticated kernel memory corruption allowing OS command execution, plus three other critical flaws.

SAP's September security updates include CVE-2026-44756 (OVERPASS, CVSS 10.0), a missing boundary validation during deserialization of Extended Passport (EPP) data in the SAP kernel, enabling unauthenticated attackers to run arbitrary OS commands with SAP administrative privileges. Also patched: CVE-2026-58240 (S4GET, CVSS 9.8), a missing authentication check in SAP NetWeaver Message Server yielding RCE as <sid>adm; CVE-2026-76969 (9.4), credential disclosure in SAP Cloud Application Programming Model multi-tenant apps; and CVE-2026-66768 (9.0), improper access control in SAP NetWeaver SAP GUI for Java. Onapsis, which discovered the flaws, says none have been exploited to date and recommends prioritizing internet-facing SAP systems.

The Hacker Newsupdated · 6d agofirst · 6d agoVulnerability 3 sourcesCVE-2026-44756CVE-2026-58240CVE-2026-76969+1 CVEs

September 2026 Patch Tuesday roundup: Plugs for two zero day holes among almost 1,000 fixes in Windows

Microsoft's September 2026 Patch Tuesday ships 964 fixes including two exploited Windows zero-days (CVE-2026-85880, CVE-2026-81963) and a wormable DNS RCE.

Microsoft's September 2026 Patch Tuesday includes 964 Microsoft vulnerabilities requiring customer action, a record attributed to AI-assisted bug discovery, plus 174 third-party/open-source and 23 Chromium/Edge CVEs. Two zero-days are exploited in the wild: CVE-2026-85880, a Windows ALPC heap overflow enabling AppContainer sandbox escape and privilege escalation, and CVE-2026-81963, a Windows Update Stack escalation to SYSTEM. CVE-2026-69730, an unauthenticated Windows DNS RCE, is not yet exploited but Microsoft expects exploitation, and roughly 20 bugs could be wormable. Separately, SAP issued a critical CVSS 10.0 fix for the EPP component used in S/4HANA and NetWeaver.

CSO Online · 6d agoVulnerability in the wildCVE-2026-85880CVE-2026-81963CVE-2026-69730+2 CVEs1

SAP warns of maximum severity 'OVERPASS' kernel vulnerability

SAP's September 2026 patches fix maximum-severity kernel flaw CVE-2026-44756 (OVERPASS), letting unauthenticated attackers execute commands on 10,000+ internet-facing SAP systems.

SAP's September 2026 Patch Tuesday addresses 20 vulnerabilities, headlined by CVE-2026-44756, a buffer overflow in the Extended Passport Protocol (EPP) library of the SAP Kernel dubbed OVERPASS by Onapsis researchers. Unauthenticated attackers can gain administrative command execution via SAP Internet Communication Manager; Onapsis counted more than 10,000 internet-facing SAP systems. SAP also fixed CVE-2026-58240 (S4GET), a critical missing-authentication flaw in the NetWeaver Message Server enabling unauthenticated remote code execution as <sid>adm. Since November 2021, CISA has added 14 SAP flaws to its actively exploited list, three abused by ransomware gangs.

SAP Patches Critical Extended Passport Processing Vulnerability

SAP patches CVSS 10.0 flaw CVE-2026-44756 (OVERPASS) enabling unauthenticated RCE in S/4HANA and NetWeaver, plus three other criticals; no in-the-wild exploitation reported.

CVE-2026-44756 is a CVSS 10.0 memory corruption flaw in Extended Passport (EPP) deserialization, triggered when a user session opens across web, SAP GUI, and RFC vectors. Exploitation yields command execution as the SAP OS account, database credential and password hash recovery, session reading, and data or binary modification; affected products include S/4HANA, ERP/ECC, NetWeaver, Web Dispatcher, and BW/4HANA. Three other criticals were patched: CVE-2026-58240 (S4GET, missing authentication affecting all S/4HANA 2025 and earlier releases), CVE-2026-76969 (CAP credential disclosure), and CVE-2026-66768 (NetWeaver access control). Onapsis and SAP report no indicators of in-the-wild exploitation.

SAP Security Updates September 2026 – Critical Flaws Patched in SAP NetWeaver, Cloud and Extended Passport

SAP's September 2026 Patch Day fixes 19 notes including CVE-2026-44756 (CVSS 10.0), unauthenticated memory corruption in SAP Extended Passport Processing kernels.

SAP shipped 19 new security notes plus one update across NetWeaver, S/4HANA, Integration Suite, Commerce Cloud, and Cloud Application Programming Model. Top issues include CVE-2026-44756 (CVSS 10.0 memory corruption in SAP Extended Passport Processing across many KERNEL and Web Dispatcher versions), CVE-2026-58240 (CVSS 9.8 missing authentication in NetWeaver Message Server), CVE-2026-76969 (CVSS 9.4 credential disclosure in CAP library sap/cds-mtxs), and CVE-2026-66768 (CVSS 9.0 access control flaw in SAP GUI for Java). No exploitation is reported; organizations running affected kernels are urged to patch urgently.

Related CVEs

  • Unauthenticated buffer overflow in SAP Kernel Extended Passport (EPP) processing
    CVE-2026-44756 is a critical (CVSS 10.0) memory-safety flaw — a classic buffer overflow (CWE-120) — in the Extended Passport Protocol (EPP) processing library of SAP Kernel, the core runtime underlying SAP NetWeaver components (SAP's advisories tie the issue to SAP Kernel and the NetWeaver Message Server). An unauthenticated remote attacker can trigger it by sending a crafted network request containing a malformed EPP header to a system that processes EPP traffic. The malformed header causes undefined behavior and abnormal program termination, and SAP's maximum-severity rating plus vendor coverage of the flaw indicate it can enable unauthenticated remote code execution with high impact on confidentiality, integrity, and availability. Any organization running the affected SAP Kernel/NetWeaver components — essentially typical ABAP-stack SAP deployments — is exposed until patched. No public proof-of-concept is known, the flaw is not in CISA KEV, EPSS estimates only a 0.3% chance of exploitation within 30 days (25th percentile), and fixes shipped in SAP's September 2026 Security Patch Day.
    · SAP Kernel (Extended Passport Protocol (EPP) processing library) · SAP NetWeaver (kernel components, including Message Server, per SAP's 2026-011 advisory)mass
  • Unauthenticated Component Registration Flaw in SAP NetWeaver Message Server
    SAP NetWeaver Message Server does not sufficiently validate the authenticity of internal application server components when they register with the service (CWE-308). An unauthenticated attacker with network access to the affected service can send a crafted registration request to add or impersonate an application server component. Once registered, the attacker can potentially perform unauthorized actions within the SAP application environment, resulting in a high impact on confidentiality, integrity, and availability — reflected in the critical CVSS 9.8 score. Any organization running SAP NetWeaver deployments that rely on the Message Server is affected; the source data does not specify exact affected version ranges. There is no evidence of active exploitation, no public proof-of-concept, and the issue is not in CISA KEV, with EPSS assigning only a ~0.3% 30-day exploitation probability; a fix shipped in SAP's September 2026 Security Patch Day (a release that also patched other critical flaws, including the separately reported 'OVERPASS' SAP Kernel issue).
    · SAP NetWeaver Message Serverlarge
  • Unauthenticated Credential Theft and Tenant Data Tampering in SAP @sap/cds-mtxs
    CVE-2026-76969 is a critical flaw (CVSS 9.4) in SAP's @sap/cds-mtxs npm package, the multitenancy component of the SAP Cloud Application Programming Model (CAP), which performs insufficient checks on certain functionality used in multitenant CAP applications with extensibility enabled. An unauthenticated attacker who can reach the affected endpoints can send specially crafted requests that cause the service to disclose sensitive credentials. With those credentials, the attacker can replace or delete tenant data, resulting in high impact to integrity and availability and partial impact to the confidentiality of business data. Only deployments running multitenant CAP applications on @sap/cds-mtxs with extensibility enabled are affected. Exploitation has not been observed: there is no known public proof of concept, the issue is not in CISA KEV, and EPSS estimates only a ~0.3% probability of exploitation within 30 days.
    · SAP @sap/cds-mtxs npm library (CAP multitenancy service; exploitable when used in multitenant CAP applications with extensibniche
  • Trust Level Policy Bypass Enables RCE in SAP GUI for Java
    SAP GUI for Java (CWE-807) fails to correctly enforce its trust level policy when certain functions are invoked from a connected backend system, meaning the client relies on untrusted backend input when making security decisions. To exploit it, an attacker needs low-privileged access to a connected backend (for example, a compromised or malicious SAP backend) and must manipulate that backend to trigger the affected functionality, which also requires interaction from the logged-in user (CVSS UI:R). Successful exploitation yields arbitrary command execution on the victim's workstation, with the changed-scope vector (S:C) allowing a backend-level foothold to break out onto the end-user machine and seriously impacting its confidentiality, integrity, and availability. Anyone running SAP GUI for Java to connect to SAP backends is exposed, particularly in scenarios where less-trusted or low-privileged users can influence the backend their colleagues connect to. There is no known public proof-of-concept, the flaw is not in CISA KEV, and EPSS estimates only a 0.3% chance of exploitation in the next 30 days, so no in-the-wild exploitation is currently known; a fix shipped as part of SAP's September 2026 security patch day.
    · SAP GUI for Javalarge
  • XXE Injection in SAP Integration Suite Allows Sensitive File Read via Logs
    SAP Integration Suite does not sufficiently validate XML documents accepted from untrusted sources in certain internal components, permitting XML external entity (XXE) injection (CWE-611). An attacker with low-privilege (authenticated) access can submit specially crafted XML payloads containing malicious external entity declarations over the network, with no user interaction required. Successful exploitation lets the attacker read sensitive files from the server, with the contents exposed through monitoring or logging output, and can also cause resource exhaustion; confidentiality impact is high, availability impact is low, and there is no integrity impact (CVSS 3.1 score 8.5, scope changed). Any organization running SAP Integration Suite, a cloud-delivered platform whose tenants consume SAP-managed components, is affected until the September 2026 SAP security updates are applied. No exploitation has been observed so far: there is no public proof-of-concept, the flaw is not in CISA KEV, and EPSS assigns only a 0.2% probability of exploitation within the next 30 days.
    · SAP Integration Suite (certain internal components that accept XML documents from untrusted sources)large
  • Authenticated SSRF in SAP Manufacturing Integration and Intelligence (MII)
    CVE-2026-76971 is a server-side request forgery (SSRF, CWE-918) vulnerability in SAP Manufacturing Integration and Intelligence (MII) that allows an attacker to make the application server initiate arbitrary outbound requests. The CVSS vector (AV:N/AC:L/PR:L/UI:R/S:C) indicates exploitation requires network access, a low-privileged authenticated session, and user interaction, and if the application processes the attacker-influenced request through its XML/XSL handling, the SSRF can be escalated into script execution. A successful attacker gains low-rated impact on confidentiality, integrity, and availability, consistent with limited script execution within the application's scope rather than full system compromise. Organizations running SAP MII, a specialized manufacturing-integration add-on typically deployed within SAP ERP landscapes at manufacturing sites, are affected; other SAP products patched in the same monthly cycle are not part of this CVE. There is no known public proof of concept, the flaw is not in CISA's KEV catalog, EPSS estimates roughly 0.1% probability of exploitation within 30 days, and no in-the-wild exploitation is known; fixes were released as part of SAP's September 2026 Security Patch Day.
    · SAP Manufacturing Integration and Intelligence (MII)niche
  • Authenticated Information Disclosure in SAP Web Dispatcher, ICM and Content Server
    CVE-2026-76968 is an information disclosure flaw (CWE-497) in SAP Web Dispatcher, SAP Internet Communication Manager (ICM), and SAP Content Server in which an authenticated user with only low privileges can reach administrative functionality or interfaces that should be off-limits to them. The attacker triggers the flaw by sending requests over the network to these administrative endpoints using valid low-privileged credentials, requiring no user interaction. By reading the exposed administrative interface, the attacker obtains sensitive information about the system state, which could be used to facilitate further attacks, although integrity and availability are not affected. Any organization running the affected SAP components is exposed, and because ICM is embedded in SAP's application server stack, this potentially touches a very broad base of SAP on-premise and cloud deployments. As of now there is no evidence of exploitation, no public proof-of-concept, and the issue is not in CISA's KEV catalog; fixes were shipped with the SAP September 2026 Security Patch Day updates.
    · SAP Web Dispatcher · SAP Internet Communication Manager (ICM)large
  • Authenticated SQL Injection in SAP S/4HANA Intercompany Matching and Reconciliation
    CVE-2026-44766 is a SQL injection flaw (CWE-89) in the Intercompany Matching and Reconciliation (IMR) component of SAP S/4HANA. A low-privileged authenticated user can submit crafted input to certain IMR functions, which is passed to the underlying database without proper validation, allowing malicious queries to execute. An attacker gains unauthorized read access to sensitive information in the database — a high confidentiality impact — with no effect on integrity or availability, and no user interaction is required beyond the attacker's own valid low-privilege session. Only organizations running SAP S/4HANA with the IMR component in use are affected; exposure is internal-facing, since exploitation requires an authenticated account rather than anonymous internet access. There is no public proof of concept, the flaw is not in CISA's KEV catalog, and EPSS of 0.2% (13th percentile) indicates no known exploitation; fixes were shipped as part of SAP's September 2026 Security Patch Day.
    · SAP S/4HANA — Intercompany Matching and Reconciliation (IMR) componentmoderate
  • The fix for CVE-2025-68161 https://logging.apache.org/security.html#CVE-2025-68161 was incomplete:
    The fix for CVE-2025-68161 https://logging.apache.org/security.html#CVE-2025-68161 was incomplete: it addressed hostname verification only when enabled via the log4j2.sslVerifyHostName https://logging.apache.org/log4j/2.x/manual/systemproperties.html#log4j2.sslVerifyHostName system property, but not when configured through the verifyHostName https://logging.apache.org/log4j/2.x/manual/appenders/network.html#SslConfiguration-attr-verifyHostName attribute of the element. Although the verifyHostName configuration attribute was introduced in Log4j Core 2.12.0, it was silently ignored in all…
    · apache log4j
  • Missing authorization check in SAP NetWeaver AS ABAP exposes system configuration data
    CVE-2026-76963 is a missing authorization check (CWE-862) in Application Server ABAP of SAP NetWeaver and ABAP Platform. A low-privileged authenticated user with network access to the affected system can trigger the flaw and gain unauthorized access to sensitive system configuration information, including security-relevant settings and internal system details. The impact is limited to confidentiality (CVSS 4.3 medium); integrity and availability are unaffected. Any organization running SAP NetWeaver AS ABAP or ABAP Platform is potentially affected. As of this analysis there is no known public proof-of-concept, it is not in CISA's KEV catalog, and EPSS estimates only a 0.2% chance of exploitation within 30 days.
    · SAP NetWeaver Application Server ABAP · SAP ABAP Platformlarge

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