Security readout for executives and security teams
Plain-English summary
CVE-2021-46903 lets an authenticated administrator in the Meinberg LANTIME LTOS web interface delete required user accounts. That can undermine device administration and availability. The issue is medium severity because it requires high privileges, but affected time infrastructure can be operationally important.
Executive priority
Treat this as a scheduled but important remediation for environments relying on Meinberg time appliances. Prioritize faster if administrators are shared, third-party managed, or management interfaces are broadly reachable.
Technical view
The flaw is an expected access-control failure in LTOS-Web-Interface for Meinberg LANTIME-Firmware before 6.24.029 and v7 before 7.04.008. CVSS 3.1 is 6.5, with network access, low complexity, high privileges, no user interaction, and high integrity and availability impact.
Likely exposure
Exposure is likely limited to organizations running Meinberg LANTIME systems with the LTOS web interface on firmware v6 before 6.24.029 or v7 before 7.04.008. Practical risk depends on who has administrative access and whether management interfaces are restricted.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not marked KEV. Exploitation requires an authenticated administrator, so this is mainly an insider, compromised-admin, or over-permissioned-account risk rather than an unauthenticated internet-wide issue.
Researcher notes
Evidence is sparse beyond the CVE description, CVSS vector, and Meinberg advisory reference. The key condition is authenticated admin capability to delete required accounts, mapped to CWE-284. No exploit mechanics or public exploitation evidence are provided.
Mitigation direction
- Update affected LANTIME firmware to 6.24.029, 7.04.008, or later vendor-supported releases.
- Restrict LTOS web interface administration to trusted management networks and authorized administrators.
- Audit administrative accounts and remove unnecessary elevated access.
- Review the Meinberg advisory before maintenance to confirm version-specific guidance.
Validation and detection
- Inventory Meinberg LANTIME systems and record firmware major version and build.
- Compare firmware against v6 before 6.24.029 and v7 before 7.04.008.
- Review administrator account lists for missing required users or unexpected deletions.
- Check management access controls for exposed or broadly reachable LTOS web interfaces.
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-284: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-2021-46903 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
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/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:H/UI:N/S:U/C:N/I:H/A:H1.25.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Source materials
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.
Improper Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.