# CVE-2026-4027: Flexera FlexNet Manager Suite improper access control in attachments

Source: https://junglewise.ai/threats/cve-2026-4027-flexera-flexnet-manager-suite-improper-access-control-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-19. Updated: 2026-06-21  
License: CC BY 4.0 with a link back

CVE-2026-4027 · Severity: info · CVSS 7.1 · Published 2026-06-19

FlexNet Manager Suite is a software asset management solution used by organizations to track and optimize their software licenses. A security flaw in the 2025 R1 and R2 versions could allow an authorized user to access attachment files they are not permitted to see. This could lead to the exposure of sensitive business documentation or licensing data stored within the system.

Technologies: [Flexera FlexNet Manager Suite](https://junglewise.ai/threats/technologies/flexnet-manager-suite). Vendors: [Flexera](https://junglewise.ai/threats/vendors/flexera).

## Quick answers

**Is CVE-2026-4027 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-4027 being exploited in the wild.

**How severe is CVE-2026-4027?** Informational severity, with a CVSS score of 7.1, published 19 June 2026.

**Which products and versions are affected?** Flexera FlexNet Manager Suite 2025 R1, 2025 R2.

**Is there a fix for CVE-2026-4027?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-4027 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-4027?** Check whether you run Flexera FlexNet Manager Suite at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An improper access control vulnerability (CWE-284) exists in Flexera FlexNet Manager Suite 2025 R1 and R2. The flaw allows a network-based attacker with low privileges (PR:L) to bypass intended access restrictions and view attachment files without proper authorization. The vulnerability stems from insufficient validation of user permissions when requesting file attachments. According to the vendor, version 2026 R1 is unaffected, implying a fix is available in that release or subsequent updates.

## Affected products

- Flexera FlexNet Manager Suite 2025 R1, 2025 R2

## Timeline

- 2026-06-19: disclosed
- 2026-06-19: advisory

## References

- [https://community.flexera.com/s/feed/0D5PL00000ssjNi0AI](https://community.flexera.com/s/feed/0D5PL00000ssjNi0AI)

## Related threats

- [Flexera FlexNet Beacon missing authentication](https://junglewise.ai/threats/cve-2026-110390-missing-authentication-in-the-flexnet-beacon-component-of)
- [Flexera FlexNet Manager Suite privilege escalation in account settings](https://junglewise.ai/threats/cve-2026-4026-flexera-flexnet-manager-suite-privilege-escalation-in-account)