PT-2026-40762 · Arqit · Symmetric Key Agreement Platform

Published 2026-05-13 · Updated 2026-05-13 · CVE-2026-33583

Mitre

CVSS v3.1

8.7

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

Exposure of the QKEY (used as input into the ‘OTA-Quantum’ device registration process) and internal system keys via an unauthenticated and unencrypted HTTP GET method in the Arqit Symmetric Key Agreement Platform.

This issue affects Symmetric Key Agreement Platform: before 26.03.

Fix

Weakness Enumeration

CWE-749

Related Identifiers

CVE-2026-33583

Affected Products

Symmetric Key Agreement Platform

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-33583 · Security Note
• https://cvcn.gov.it/cvcn/cve/CVE-2026-33583 · Note