---
cve: "CVE-2026-9508"
severity: "CRITICAL"
cvss: 10.0
epss: "0.3%"
vendor: "Suprema"
kev: false
exploited: false
published: "2026-05-29 13:16:23"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-11-10T19:23:30+01:00"
---

# CVE-2026-9508

> 10.0 CRITICAL

## Beschreibung

Incorrect permission settings on a critical resource in Suprema BioStar 2 (versions 2.9.3 through 2.9.11) that allow backup files to be publicly exposed when the administrator configures their path within the NGINX webroot. This vulnerability allows an attacker with network access to directly download backup ZIP files via ‘http(s)://[server]/download/…’ without requiring authentication. This exposes highly sensitive information that can lead to server impersonation, unauthorized access to databases, and lateral movement.

## CNA-Record (Kanon, cvelistV5)

- CNA: **INCIBE**
- State: PUBLISHED
- Stand: 2026-05-29 13:33:31
- CNA-CVSS: **10.0** (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **yes**
  - Technical Impact: **total**

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Schwachstellen-Klasse

- **CWE-732** — Incorrect Permission Assignment for Critical Resource
  The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.

## Angriffsmuster (CAPEC)

- [CAPEC-1 — Accessing Functionality Not Properly Constrained by ACLs](https://capec.mitre.org/data/definitions/1.html) _(Severity: High)_
- [CAPEC-17 — Using Malicious Files](https://capec.mitre.org/data/definitions/17.html) _(Severity: Very High)_
- [CAPEC-60 — Reusing Session IDs (aka Session Replay)](https://capec.mitre.org/data/definitions/60.html) _(Severity: High)_
- [CAPEC-122 — Privilege Abuse](https://capec.mitre.org/data/definitions/122.html) _(Severity: Medium)_
- [CAPEC-127 — Directory Indexing](https://capec.mitre.org/data/definitions/127.html) _(Severity: Medium)_
- [CAPEC-180 — Exploiting Incorrectly Configured Access Control Security Levels](https://capec.mitre.org/data/definitions/180.html) _(Severity: Medium)_
- [CAPEC-206 — Signing Malicious Code](https://capec.mitre.org/data/definitions/206.html) _(Severity: Very High)_
- [CAPEC-234 — Hijacking a privileged process](https://capec.mitre.org/data/definitions/234.html) _(Severity: Medium)_

## ATT&CK-Techniken

- [T1574.010 — Hijack Execution Flow: ServicesFile Permissions Weakness](https://attack.mitre.org/techniques/T1574/010/)
- [T1574.005 — Hijack Execution Flow: Executable Installer File Permissions](https://attack.mitre.org/techniques/T1574/005/)
- [T1134.001 — Access Token Manipulation:Token Impersonation/Theft](https://attack.mitre.org/techniques/T1134/001/)
- [T1550.004 — Use Alternate Authentication Material:Web Session Cookie](https://attack.mitre.org/techniques/T1550/004/)
- [T1548 — Abuse Elevation Control Mechanism](https://attack.mitre.org/techniques/T1548/)
- [T1083 — File and Directory Discovery](https://attack.mitre.org/techniques/T1083/)
- [T1553.002 — Subvert Trust Controls:Code Signing](https://attack.mitre.org/techniques/T1553/002/)

## Referenzen

- <https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-supremas-biostar>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-9508/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_