Security readout for executives and security teams
Plain-English summary
CVE-2021-44769 affects Lanner IAC-AST2500A standard firmware 1.10.0. A highly privileged network attacker could trigger a failure in TLS certificate generation that causes denial of service. The source states recovery can require a factory reset, making this operationally disruptive despite the medium CVSS score.
Executive priority
Treat as a targeted operational resilience issue. Prioritize if affected devices support production, OT, or remote management functions, because downtime may be prolonged by factory reset recovery.
Technical view
The issue is improper input validation, CWE-20, in the TLS certificate generation function. CVSS 3.1 is 4.9: network reachable, low complexity, high privileges required, no user interaction, and high availability impact. Sources identify only Lanner IAC-AST2500A standard firmware 1.10.0 as affected.
Likely exposure
Exposure is most likely in environments using Lanner IAC-AST2500A BMC firmware version 1.10.0, especially where administrative BMC functions are reachable over a network. The source bundle does not identify other versions or products.
Exploitation context
No source in the bundle states active exploitation, and the CVE is not listed as KEV. Exploitation requires high privileges, reducing broad internet-scale risk, but a successful attack can create a denial-of-service condition that may require factory reset recovery.
Researcher notes
Evidence is specific but limited: one affected product and firmware version, a TLS certificate generation input-validation flaw, and DoS impact. The bundle does not provide patch details, exploit evidence, or expanded affected-version analysis.
Mitigation direction
- Identify IAC-AST2500A devices running standard firmware 1.10.0.
- Check Lanner and Nozomi advisories for supported firmware updates or operational mitigations.
- Restrict BMC and certificate-management access to trusted administrative networks.
- Limit high-privilege accounts and review who can generate TLS certificates.
- Prepare recovery procedures because remediation after failure may require factory reset.
Validation and detection
- Inventory BMC firmware versions and confirm any IAC-AST2500A standard 1.10.0 deployments.
- Review access controls for the TLS certificate generation interface.
- Check logs or change records for recent certificate generation by privileged users.
- Confirm backup, configuration export, and factory-reset recovery procedures are current.
- Monitor vendor advisories for fixed firmware or additional affected versions.
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-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-44769 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
- 4.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/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:N/A:H1.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.9MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/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 Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.