CVE-2026-110390

FlexNet Beacon Missing Authentication Vulnerability

publishedCWE-306CWE-497

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).

Technical severity6.9 mediumCVSS 4.0 · CNA: flexera

Published2026-11-05Source updated 2026-11-05

Collected2026-11-051 attributed source

Fixes and workarounds

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: CNA: flexera

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
FlexNet Beacon Flexera Platforms: Windows	≥ 0; < 26.4.1 (affected, custom) Other versions: unaffected	CNA: flexera
FlexNet Manager Suite Flexera Platforms: Windows	≥ 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) Other versions: unaffected	CNA: flexera

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
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`	CNA: flexera

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-2026-110390CNA: flexera · vendor-advisory
https://community.flexera.com/s/article/Flexera-Beacon-security-hotfix-IOK-2107311CNA: flexera · patch

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