Home/CVE/Exposure of the QKEY (used as input into the ‘OTA-Quantum’ device registration process) and internal system keys v
CVE

CVE-2026-33583

Exposure of the QKEY (used as input into the ‘OTA-Quantum’ device registration process) and internal system keys v

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.

HIGH · CVSS 8.7 EPSS 0.00041
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-749Exposed Dangerous Method or Function
▣

Scoring & Timeline

8.7
HIGH · CVSS v3.1 · a6d3dc9e-0591-4a13-bce7-0f5b31ff6158
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 May 2026 · 07:17 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.cvcn.gov.it/cvcn/cve/CVE-2026-33583
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