Security readout for executives and security teams
Plain-English summary
This vulnerability affects Lanner IAC-AST2500A BMC firmware 1.10.0. An unauthenticated network attacker could change BMC network settings, which may disrupt remote management or weaken control over affected hardware. The provided sources do not show active exploitation or name broader affected products.
Executive priority
Treat as a targeted operational risk for environments using the named Lanner BMC firmware. Prioritize inventory and management-plane isolation before broad emergency action, unless affected devices are internet-exposed or support critical operations.
Technical view
CVE-2021-26732 is broken access control in spx_restservice First_network_func. The CVSS vector is network-accessible, low complexity, no privileges, and no user interaction, with low integrity and availability impact. The documented affected product is Lanner IAC-AST2500A standard firmware 1.10.0.
Likely exposure
Exposure is likely limited to organizations running Lanner IAC-AST2500A devices with standard firmware 1.10.0, especially where BMC management interfaces are reachable from untrusted networks or flat internal segments.
Exploitation context
The source bundle and KEV status do not support a claim of active exploitation. The CVSS vector indicates remote unauthenticated reachability, but the described impact is limited to arbitrary BMC network configuration changes.
Researcher notes
Evidence is specific to First_network_func in spx_restservice on IAC-AST2500A firmware 1.10.0. The bundle does not provide patch details, exploit observations, or evidence that other Lanner firmware branches are affected.
Mitigation direction
- Identify Lanner IAC-AST2500A systems and confirm BMC firmware versions.
- Check Lanner and Nozomi guidance for any firmware update or vendor mitigation.
- Restrict BMC management access to trusted administration networks only.
- Block untrusted network paths to BMC management services.
- Monitor for unexpected BMC network configuration changes.
Validation and detection
- Inventory BMC hardware models and firmware versions.
- Confirm whether any device runs IAC-AST2500A standard firmware 1.10.0.
- Review firewall rules and routing to BMC management interfaces.
- Check BMC logs or configuration history for unauthorized network changes.
- Track vendor advisories for updated remediation details.
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
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Open ATT&CK lookupCVE-2021-26732 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:N/UI:N/S:U/C:N/I:L/A:L
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:N/I:L/A:L3.92.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
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.