Wertheim SafeController 5400 Hardware for VAULT ROOMS 6.11.8130.22320 authentication replay

Summaryinfo

A vulnerability marked as problematic has been reported in Wertheim SafeController 5400 Hardware for VAULT ROOMS 6.11.8130.22320. This impacts an unknown function. This manipulation causes authentication replay. This vulnerability is registered as CVE-2026-34021. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in Wertheim SafeController 5400 Hardware for VAULT ROOMS 6.11.8130.22320 and classified as problematic. Affected by this vulnerability is an unknown code. The manipulation with an unknown input leads to a authentication replay vulnerability. The CWE definition for the vulnerability is CWE-294. A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The Wertheim SafeController 5400, Controller 5400 - AssemblyVersion 6.11.8130.22320, uses RS-485 communication between the server and the microcontroller without cryptographic protection. An attacker with access to the communication path between the server and the microcontroller can sniff RS-485 messages and replay previously observed messages. This can be used, for example, to spoof a "quit alarm" message and continuously deactivate the safe alarm.

The weakness was published by Gorazd Jank. The advisory is shared at wertheim-safes.com. This vulnerability is known as CVE-2026-34021 since 03/25/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/15/2026). MITRE ATT&CK project uses the attack technique T1040 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Wertheim

Name

• SafeController 5400 Hardware for VAULT ROOMS

Version

• 6.11.8130.22320

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion