CVE-2026-123039Quantum Security Gateway Missing Authorization
The Gaia OS DynamicCLI daemon runs as root and listens on a world-writable local socket (/tmp/dynamic_socket) without authenticating connecting processes.
Published Nov 12, 2026 · Updated Nov 13, 2026 · Also known as EUVD-2026-124481, GHSA-m95q-vgfj-2v8g
Key Facts
Patch immediately- CVE-2026-123039 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting Quantum Security Gateway, Quantum Security Management.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV since Nov 12, 2026. No public exploit code is known.
- EPSS estimates a 1.3% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
1.3%
Higher than 70.3% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
69/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Nov 13, 2026
1 days after publication
Federal due date
Nov 16, 2026
3 days left
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
2
Reports of active use
Required action (CISA): Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Description
The Gaia OS DynamicCLI daemon runs as root and listens on a world-writable local socket (/tmp/dynamic_socket) without authenticating connecting processes. An authenticated local user can send a command to the socket and have it executed as root.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Nov 13, 2026 | Nov 16, 2026 | Not reported |
| Industry KEV feed | Nov 12, 2026 | Nov 16, 2026 | Not reported |
| CIRCL KEV | Nov 12, 2026 | Nov 16, 2026 | Not reported |
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Quantum Security Gateway | See advisory | n/a |
| Quantum Security Management | See advisory | n/a |
Timeline
Publicly disclosed
Nov 12, 2026
Added to Industry KEV feed
Nov 12, 2026
Added to CIRCL KEV
Nov 12, 2026
Added to CISA KEV
Nov 13, 2026
Last updated
Nov 13, 2026
Weakness Type
- CWE-732 Incorrect Permission Assignment for Critical Resource
- CWE-862 Missing Authorization
References
FAQ
Common Questions.
The Gaia OS DynamicCLI daemon runs as root and listens on a world-writable local socket (/tmp/dynamic_socket) without authenticating connecting processes.
Affected: Quantum Security Gateway; Quantum Security Management. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV since Nov 12, 2026.
Yes. It was added on Nov 13, 2026 with a federal remediation due date of Nov 16, 2026.
No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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