Vulnerability · Published May 13, 2026 · Assigned by ENISA
CVE-2026-33583Arqit SKA-Platform Vulnerable to Key Exposure
High 8.7
In plain English
A high-severity security flaw in Symmetric Key Agreement Platform from Arqit. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).
Severity (CVSS 3.1)8.7High
Exploit odds (30 days)0.2%top 89.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Arqit | Symmetric Key Agreement Platform | 0 – before 26.03 |
Weakness: CWE-749 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
References
- https://www.cvcn.gov.it/cvcn/cve/CVE-2026-33583 third-party-advisory