Security readout for executives and security teams
Plain-English summary
PiiGAB M-Bus SoftwarePack 900S reportedly contains hard-coded credentials used for authentication. If the affected service is reachable, an attacker may be able to authenticate without needing a valid user account. The CVSS score is critical because successful access could affect confidentiality, integrity, and availability.
Executive priority
Treat this as urgent for any exposed or operationally important deployment. Prioritize inventory, isolation, and vendor guidance review before normal maintenance windows if the product is reachable from untrusted networks.
Technical view
CVE-2023-35987 is a CWE-798 hard-coded credential flaw in PiiGAB M-Bus SoftwarePack 900S. The provided CVSS v3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating remote, low-complexity exploitation with no privileges or user interaction required.
Likely exposure
Exposure is most likely where PiiGAB M-Bus SoftwarePack 900S is deployed on reachable operational, building, or metering networks. The source bundle marks other versions as unaffected by default, but product inventory should verify exact deployments.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation evidence. Public source detail is limited, but hard-coded authentication credentials are high-impact because the weakness can bypass normal access control if the affected interface is reachable.
Researcher notes
Evidence supports hard-coded credentials in a specific PiiGAB product/version and a critical CVSS rating. The supplied sources do not provide exploit details, active exploitation confirmation, or a named patch, so remediation should be verified against vendor/CISA guidance.
Mitigation direction
- Identify all PiiGAB M-Bus SoftwarePack 900S deployments and owners.
- Check PiiGAB and CISA guidance for fixed versions or vendor workarounds.
- Remove affected systems from internet and untrusted network exposure.
- Restrict access to necessary management hosts using firewall allowlists or equivalent controls.
- Monitor authentication and configuration changes on affected systems.
- Plan replacement or compensating controls if credentials cannot be changed.
Validation and detection
- Confirm installed product and version against PiiGAB M-Bus SoftwarePack 900S.
- Review network paths to determine whether affected services are remotely reachable.
- Verify whether vendor guidance or updates have been applied.
- Check logs for unexpected authentication, configuration, or service access events.
- Validate firewall rules restrict access to approved administrative sources.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-798: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-35987 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cisa.gov/news-events/ics-advisories/icsa-23-187-01CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.