# CVE-2026-95378: Path traversal in Zenitel turbineweb certificate upload allows arbitrary file write as root

Status: published. Published: 2026-11-13. Updated: 2026-11-13.

Path traversal in the certificate upload endpoint (/api/certificate/upload) of the turbineweb web interface in Zenitel VSFF6, VSFF8, VSFF8MP, VSFF8MN, and VSFT devices with software versions from 10.0.3.0 before 10.1.3.0 allows authenticated administrators to write arbitrary files as root via a crafted filename parameter in a multipart upload request when the type field is set to any value other than https_certificate. In that case, both path validation and certificate content validation are skipped.



This can be escalated to arbitrary code execution as root, for example by overwriting startup scripts or planting SSH keys.

## Remediation

- fix: Affected devices should upgrade to version 10.1.3.0 (and newer). (source: CNA: Zenitel)

## Affected products and versions

- Zenitel / VSFF6 (turbineweb): ≥ 10.0.3.0; < 10.1.3.0 (affected, custom). Source: CNA: Zenitel; platforms: Linux, ARM, 32 bit
- Zenitel / VSFF8 (turbineweb): ≥ 10.0.3.0; < 10.1.3.0 (affected, custom). Source: CNA: Zenitel; platforms: Linux, ARM, 64 bit
- Zenitel / VSFF8MP (turbineweb): ≥ 10.0.3.0; < 10.1.3.0 (affected, custom). Source: CNA: Zenitel; platforms: Linux, ARM, 64 bit
- Zenitel / VSFF8MN (turbineweb): ≥ 10.0.3.0; < 10.1.3.0 (affected, custom). Source: CNA: Zenitel; platforms: Linux, ARM, 64 bit
- Zenitel / VSFT (turbineweb): ≥ 10.0.3.0; < 10.1.3.0 (affected, custom). Source: CNA: Zenitel; platforms: Linux, ARM, 32 bit

## Severity and prioritization

- CVSS 4.0: 8.6 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/S:P; source: CNA: Zenitel

- CVSS 4.0: 8.6 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:X/R:X/V:X/RE:X/U:X; source: NVD: cf9c5165-6fe5-4ec0-b5f1-404f1df30a4e

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-22, CWE-434

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.zenitel.com/sites/default/files/2026-11/A100K12404-Zenitel-Security-Advisory.pdf (CNA: Zenitel)

- https://www.zenitel.com/sites/default/files/2026-11/A100K12404-Zenitel-Security-Advisory.pdf (cf9c5165-6fe5-4ec0-b5f1-404f1df30a4e)

## Provenance

- CNA: Zenitel: https://www.cve.org/CVERecord?id=CVE-2026-95378; retrieved 2026-11-13; source updated 2026-11-13

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-95378; retrieved 2026-11-13; source updated 2026-11-13

Revision: 23da425222fe58c233a45dc6feab3dcb6311ea16213a4ed8ded8e2e0e46c62ed

Canonical: https://y2.dev/cve/CVE-2026-95378

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- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

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