M Bus 900S Firmware
CVE-2023-35987
CRITICAL
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Credential externalization
MITRE ATT&CK
2 techniques across 2 tactics: Persistence, Credential Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. |
| Exploit ScenarioDerived | A remote attacker could gain access using credentials embedded in source code by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAI
PiiGAB M-Bus contains hard-coded credentials which it uses for authentication. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Remove hard-coded credentials, use environment variables or secrets management, rotate exposed credentials immediately.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Use of Hard-coded Credentials (CWE-798), which allows attackers to gain access using credentials embedded in source code. PiiGAB M-Bus contains hard-coded credentials which it uses for authentication. Affected products include: Piigab M-Bus 900S Firmware.
Know when M Bus 900S Firmware gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
PiiGAB M-Bus contains hard-coded credentials which it uses for authentication.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Affected Products (CPE)NVD
More in M Bus 900S Firmware
View allThere are no requirements for setting a complex password for PiiGAB M-Bus, which could contribute to a successful brute
PiiGAB M-Bus stores passwords using a weak hash algorithm. Rated critical severity (CVSS 9.8), this vulnerability is rem
PiiGAB M-Bus SoftwarePack 900S does not correctly sanitize user input, which could allow an attacker to inject arbitrary
The number of login attempts is not limited. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploita
PiiGAB M-Bus is vulnerable to cross-site request forgery. Rated high severity (CVSS 8.8), this vulnerability is remotely
PiiGAB M-Bus transmits credentials in plaintext format. Rated high severity (CVSS 7.5), this vulnerability is remotely e
PiiGAB M-Bus stores credentials in a plaintext file, which could allow a low-level user to gain admin credentials. Rated
PiiGAB M-Bus does not validate identification strings before processing, which could make it vulnerable to cross-site sc
GitHub PoC
Exploit-DB