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

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

Positive Technologies (AI Summary)

CVSS v3.1

8.7

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Arqit Symmetric Key Agreement Platform versions prior to 26.03

Description The Arqit Symmetric Key Agreement Platform allows the exposure of the QKEY, which is used as input for the 'OTA-Quantum' device registration process, as well as internal system keys. This occurs through an unauthenticated and unencrypted HTTP GET method.

Recommendations Update to version 26.03 or later.

Fix

Weakness Enumeration

CWE-749

Related Identifiers

CVE-2026-33583

Affected Products

Symmetric Key Agreement Platform

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-33583 · Security Note
• https://twitter.com/VulmonFeeds/status/2054711839565455612 · Twitter Post
• https://twitter.com/CVEnew/status/2054709281367417063 · Twitter Post
• https://cvcn.gov.it/cvcn/cve/CVE-2026-33583 · Note