🛡️ CVE-2026-21662 — fms-employee

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: High — total loss, or loss the attacker controls.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2026-21662 is classified as CWE-434: Unrestricted Upload of File with Dangerous Type. Uploads are accepted without restricting type, so an executable file can be placed where the server will run it.

Affected software

CVE-2026-21662 is recorded against 1 package.

• fms-employee (fixed in 2025.3.1)

Timeline and source

Published on 31 July 2026 and last revised on 10 August 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

www.johnsoncontrols.com

Other advisories for this package

fms-employee has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2026-34497 (5.4 Medium, published 31 Jul 2026)
• CVE-2026-34495 (5.4 Medium, published 31 Jul 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-434: Unrestricted Upload of File with Dangerous Type) in other software:

• CVE-2026-72592 (9.8 Critical, published 10 Aug 2026)
• CVE-2026-19089 (9.8 Critical, published 10 Aug 2026)
• CVE-2026-16985 (8.8 High, published 10 Aug 2026)
• CVE-2026-63223 (9.8 Critical, published 7 Aug 2026)
• CVE-2022-4995 (9.8 Critical, published 7 Aug 2026)
• CVE-2026-66665 (10.0 Critical, published 6 Aug 2026)
• CVE-2026-71434 (5.3 Medium, published 6 Aug 2026)
• CVE-2026-67688 (9.8 Critical, published 6 Aug 2026)

Details

Affected Packages

References