---
cve: "CVE-2026-66760"
severity: "MEDIUM"
cvss: 6.4
epss: "0.2%"
vendor: "SAP_SE"
kev: false
exploited: false
published: "2026-08-11 01:17:22"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-11-09T14:23:17+01:00"
---

# CVE-2026-66760

> 6.4 MEDIUM

## Beschreibung

SAP Approuter does not correctly validate client certificates in certain callback flows. An attacker with low privileges, holding a certificate from the same trusted authority with matching subject values, could bypass the identity check. This complexity makes the attack difficult to execute. Successful exploitation could allow impersonation of a trusted internal component, resulting in a high impact on integrity and a low impact on confidentiality and availability.

## CNA-Record (Kanon, cvelistV5)

- CNA: **sap**
- State: PUBLISHED
- Stand: 2026-08-11 14:29:29
- CNA-CVSS: **6.4** (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Gering | warn |

## Schwachstellen-Klasse

- **CWE-295** — Improper Certificate Validation
  The product does not validate, or incorrectly validates, a certificate.

## Angriffsmuster (CAPEC)

- [CAPEC-459 — Creating a Rogue Certification Authority Certificate](https://capec.mitre.org/data/definitions/459.html) _(Severity: Very High)_
- [CAPEC-475 — Signature Spoofing by Improper Validation](https://capec.mitre.org/data/definitions/475.html) _(Severity: High)_

## BSI-Hinweise (deutsch)

- [SAP Patch Day August 2026: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2026-2746) — _BSI-Einstufung: kritisch_
  Ein Angreifer kann mehrere Schwachstellen in SAP Software ausnutzen, um beliebigen Code auszuführen, Berechtigungen zu erweitern, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen oder Anmeldedaten offenzulegen, Daten zu manipulieren, SQL-Injection- oder Cross-Site-Scripting-Angriffe durchzuführen oder einen Denial-of-Service-Zustand herbeizuführen.

## Referenzen

- <https://me.sap.com/notes/3786038>
- <https://url.sap/sapsecuritypatchday>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-66760/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_