# CVE-2026-110390: FlexNet Beacon Missing Authentication Vulnerability

Status: published. Published: 2026-11-05. Updated: 2026-11-05.

Missing authentication in the FlexNet Beacon component of Flexera One and FlexNet Manager Suite allows unauthenticated remote attackers to obtain Beacon policy and targeting information when anonymous web server access is enabled (the default).

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: flexera) — https://community.flexera.com/s/article/Flexera-Beacon-security-hotfix-IOK-2107311

## Affected products and versions

- Flexera / FlexNet Beacon: ≥ 0; < 26.4.1 (affected, custom). Source: CNA: flexera; platforms: Windows
- Flexera / FlexNet Manager Suite: ≥ 2026 R1; < 2026 R2 (affected, custom); unaffected at 2026 R1 IOK-2107311; ≥ 2025 R2; < 2026 R1 (affected, custom); unaffected at 2025 R2 IOK-2107311; ≥ 2025 R1; < 2025 R2 (affected, custom); unaffected at 2025 R1 IOK-2107311; ≥ 0; < 2025 R1 (affected, custom). Source: CNA: flexera; platforms: Windows

## Severity and prioritization

- CVSS 4.0: 6.9 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N; source: CNA: flexera

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-306, CWE-497

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://community.flexera.com/s/article/Flexera-Beacon-Security-Advisory-CVE-2026-110390 (CNA: flexera; vendor-advisory)

- https://community.flexera.com/s/article/Flexera-Beacon-security-hotfix-IOK-2107311 (CNA: flexera; patch)

## Provenance

- CNA: flexera: https://www.cve.org/CVERecord?id=CVE-2026-110390; retrieved 2026-11-05; source updated 2026-11-05

Revision: bc3619c950f76a45b32c9589bd21844af6a7783dae32528513a0b4c044bb28cd

Canonical: https://y2.dev/cve/CVE-2026-110390

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