---
title: "CVE-2026-114611: OCO-Server - Authentication Bypass"
description: "OCO-Server < 1.2.3 contains a broken authentication caused by improper PKCS#7 signature verification with PKCS7_NOVERIFY in frontend/api-mdm.php, letting attackers impersonate victim devices and hijack MDM relationships, exploit requires knowledge of a registered device's serial number."
url: https://panop.io/threat-heartbeat/CVE-2026-114611/
---

# CVE-2026-114611 OCO-Server - Authentication Bypass

OCO-Server < 1.2.3 contains a broken authentication caused by improper PKCS#7 signature verification with PKCS7\_NOVERIFY in frontend/api-mdm.php, letting attackers impersonate victim devices and hijack MDM relationships, exploit requires knowledge of a registered device's serial number.

CVSS base score 9.1 /10

Critical

CISA KEV

Not listed

Public exploit

None known

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-114611)

## Details

Type

Authentication Bypass

Impact

Broken Authentication

CVSS vector

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

Published

22 October 2026

Updated

23 October 2026

Weakness

[CWE-295](https://cwe.mitre.org/data/definitions/295.html)

## Vendor fix

Update to version 1.2.3 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-114611](https://nvd.nist.gov/vuln/detail/CVE-2026-114611)
- [https://github.com/schorschii/OCO-Server/security/advisories/GHSA-p549-5h7r-7639](https://github.com/schorschii/OCO-Server/security/advisories/GHSA-p549-5h7r-7639)
- [https://github.com/schorschii/OCO-Server/commit/5cab5ad2461434816d706b7be9cc08bda15c1404](https://github.com/schorschii/OCO-Server/commit/5cab5ad2461434816d706b7be9cc08bda15c1404)
- [https://github.com/schorschii/OCO-Server/commit/f3a6591136f9bd92aff39ddfb26587e6dfdb64df](https://github.com/schorschii/OCO-Server/commit/f3a6591136f9bd92aff39ddfb26587e6dfdb64df)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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