🛡️ CVE-2025-27396 — scalance-lpe9403-firmware

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level 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:L/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: Low — an ordinary user account is enough.
• 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-2025-27396 is classified as CWE-273: Improper Check for Dropped Privileges. The product attempts to drop privileges but does not check or incorrectly checks to see if the drop succeeded.

Affected software

CVE-2025-27396 is recorded against 1 package.

• scalance-lpe9403-firmware (fixed in 4.0)

Timeline and source

Published on 11 March 2025 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

cert-portal.siemens.com

Other advisories for this package

scalance-lpe9403-firmware has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2025-40583 (4.4 Medium, published 13 May 2025)
• CVE-2025-40576 (4.3 Medium, published 13 May 2025)
• CVE-2025-40582 (7.8 High, published 13 May 2025)
• CVE-2025-40575 (4.3 Medium, published 13 May 2025)
• CVE-2025-40581 (7.1 High, published 13 May 2025)
• CVE-2025-40574 (7.8 High, published 13 May 2025)
• CVE-2025-40580 (6.7 Medium, published 13 May 2025)
• CVE-2025-40573 (4.4 Medium, published 13 May 2025)

Same weakness in other software

These advisories are the same class of weakness (CWE-273: Improper Check for Dropped Privileges) in other software:

• CVE-2026-54552 (8.0 High, published 18 Aug 2026)
• CVE-2026-60085 (7.5 High, published 15 Jul 2026)
• CVE-2021-37839 (published 6 Jul 2026)
• CVE-2026-35370 (published 6 Jul 2026)
• CVE-2026-0099 (7.8 High, published 1 Jun 2026)
• CVE-2026-44073 (5.0 Medium, published 21 May 2026)
• CVE-2026-32107 (8.8 High, published 17 Apr 2026)
• CVE-2025-62175 (5.0 Medium, published 15 Oct 2025)

Details

Affected Packages

References