Security readout for executives and security teams
Plain-English summary
CVE-2023-21406 affects AXIS A1001 Network Door Controllers running AXIS OS 1.65.4 or earlier. A malformed OSDP message can corrupt memory in the controller process that handles OSDP, potentially enabling code execution. This matters because the device controls physical access, so integrity and availability impact can become operational, not just IT-focused.
Executive priority
Treat this as a high-priority physical access-control risk if AXIS A1001 devices are present. The business concern is potential compromise or disruption of door-control infrastructure. Urgency should be driven by asset presence, AXIS OS version, and how exposed OSDP communication is in the environment.
Technical view
The flaw is a heap-based buffer overflow in the pacsiod process during OSDP communication. Appending invalid data to an OSDP message can write beyond the allocated heap buffer. The CVSS 3.1 score is 7.1, with adjacent attack vector, high complexity, no privileges, no user interaction, and high integrity and availability impact.
Likely exposure
Exposure is likely limited to organizations that deployed AXIS A1001 Network Door Controllers running AXIS OS 1.65.4 or earlier and using reachable OSDP communication paths. The source bundle marks later or other products as not established here.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The CVSS vector indicates adjacent access, high attack complexity, no required privileges, and no user interaction. The described outcome is potentially arbitrary code execution, but no exploit steps or public weaponization evidence are provided.
Researcher notes
Key constraints are the adjacent attack vector and high complexity. The vulnerability class is CWE-120/CWE-122 memory corruption in pacsiod. The bundle names AXIS A1001 and AXIS OS 1.65.4 or earlier, but does not include detailed patch version text beyond referring to the Axis advisory.
Mitigation direction
- Inventory AXIS A1001 controllers and record AXIS OS versions.
- Prioritize AXIS OS 1.65.4 or earlier for vendor-guided remediation.
- Review and apply the Axis security advisory guidance.
- Restrict access to OSDP communication paths where operationally possible.
- Monitor controllers for crashes, unexpected restarts, or abnormal access-control behavior.
Validation and detection
- Confirm whether any deployed device is AXIS A1001.
- Verify the AXIS OS version on each identified controller.
- Check whether OSDP communication is enabled and reachable.
- Review change records for remediation aligned with Axis guidance.
- Confirm compensating access restrictions around affected controllers.
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
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ATT&CK lookup starting points
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CWE-120: Exact CWE lookup
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Open ATT&CK lookupCWE-122: Exact CWE lookup
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Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2023-21406 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/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:A/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H1.65.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.axis.com/dam/public/1b/21/5f/cve-2023-21406-en-US-407245.pdfCVE 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.