CVE-2026-14837 PUBLISHED

SSH Enablement Signature Verification Bypass

Assigner: CERTVDE
Reserved: 06.07.2026 Published: 27.07.2026 Updated: 27.07.2026

Multiple Lenze products are affected by an improper signature verification vulnerability in the SSH enablement mechanism. A low-privileged local attacker can bypass verification of the SSH enable file signature and enable SSH access on the device. Successful exploitation may result in unauthorized administrative access and complete system compromise.

CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 8.5

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 7.8

Attack Vector	Local	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Lenze
Product	c430
Versions	Default: unaffected affected from 1.0.0 to 1.15.2 (excl.)

Vendor	Lenze
Product	c520
Versions	Default: unaffected affected from 1.0.0 to 1.15.2 (excl.)

Vendor	Lenze
Product	c550
Versions	Default: unaffected affected from 1.0.0 to 1.15.2 (excl.)

Vendor	Lenze
Product	i950 GenA
Versions	Default: unaffected affected from 1.0.0 to 1.14.2 (excl.)

Vendor	Lenze
Product	i950 GenB
Versions	Default: unaffected affected from 2.0.0 to 2.0.3 (excl.)

References

https://www.certvde.com/en/advisories/VDE-2026-077/

Problem Types

CWE-347 Improper Verification of Cryptographic Signature CWE