# CVE-2026-27671 — SAP_SE SAP NetWeaver AS ABAP and ABAP Platform

> As of 2026-06-09, CVE-2026-27671 is a CRITICAL-severity vulnerability in SAP_SE SAP NetWeaver AS ABAP and ABAP Platform, CVSS v3.1 9.8, EPSS 0.6% (48.3th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-27671, most recently “SAP Patches Critical NetWeaver, Approuter, and Commerce Cloud Flaws (CVE-2026-44747, CVE-2026-27690, CVE-2026-44761)”.

**Last updated:** 2026-06-09

## What is CVE-2026-27671?

Due to improper RFC protocol validation in the SAP Kernel used by the Application Server ABAP of SAP NetWeaver and ABAP Platform, an unauthenticated attacker can send a crafted RFC request that exploits logical errors in memory management, leading to memory corruption. This could lead to a high impact on the confidentiality, integrity, and availability of the application.

The record classifies CVE-2026-27671 under weakness class [CWE-121](https://intel.threadlinqs.com/cwe/CWE-121). 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 137 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 9.8 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.6% probability of exploitation in the next 30 days, higher than 48.3% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 6.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-06-09

## Is CVE-2026-27671 being exploited?

It currently carries a trending score of 17 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [SAP_SE](https://intel.threadlinqs.com/vendors/sap-se): SAP NetWeaver AS ABAP and ABAP Platform

## How to fix CVE-2026-27671

No vendor patch reference has been recorded for CVE-2026-27671 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-2026-27671

1 tracked threat in the Threadlinqs corpus references CVE-2026-27671, either in the campaign’s CVE list or as an indicator on the campaign record.

- [SAP Patches Critical NetWeaver, Approuter, and Commerce Cloud Flaws (CVE-2026-44747, CVE-2026-27690, CVE-2026-44761)](https://intel.threadlinqs.com/threat/TL-2026-1302) — CRITICAL · 2026-07-14

## Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-10.

**Other references**

- [me.sap.com](https://me.sap.com/notes/3717897)
- [url.sap](https://url.sap/sapsecuritypatchday)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-27671
Full detection coverage and IOCs for threats exploiting CVE-2026-27671 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp