Security readout for executives and security teams
Plain-English summary
This CVE can let an unauthenticated remote attacker crash affected Matter-based devices by triggering a null pointer dereference. The business impact is availability, not data theft, but repeated crashes can disrupt connected-device operations and customer trust.
Executive priority
Treat as high priority for environments where Matter devices support critical operations or customer-facing services. The main risk is disruption from remote crashes, not confidentiality loss.
Technical view
The issue is CWE-476 in Matter SDK connectedhomeip ReadRevisionAttribute handling across multiple clusters. The function dereferences a delegate pointer without adequate validation. The CVSS 3.1 vector is network, low complexity, no privileges, no user interaction, with high availability impact only.
Likely exposure
Exposure is likely limited to devices or firmware built with vulnerable connectedhomeip Matter SDK code paths. The source bundle does not identify specific vendors, products, CPEs, or deployed device models, so asset and firmware inventory are required.
Exploitation context
The source states remote unauthenticated crafted read requests can crash a device. CISA KEV status is false in the bundle, and no cited source here confirms active exploitation in the wild.
Researcher notes
The bundle contains a version ambiguity: it says connectedhomeip before 1.4.0 is affected, while also saying the issue was confirmed in SDK v1.4 commit ab3d5ae. Validate fixed versions directly with upstream or vendor guidance.
Mitigation direction
- Inventory Matter devices and firmware using connectedhomeip.
- Review project-chip issue 39173 and vendor advisories for fixed guidance.
- Apply vendor firmware or SDK updates when confirmed available.
- Prioritize exposed or operationally critical Matter devices.
- Monitor devices for repeated crash or reboot patterns.
Validation and detection
- Map device firmware to connectedhomeip SDK versions or commits.
- Check whether affected clusters are present in deployed firmware.
- Confirm whether vendor guidance references CVE-2025-56363 or issue 39173.
- Use logs or monitoring to identify unexplained availability failures.
- Do not perform crash testing on production devices.
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-476: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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-2025-56363 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/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.
SSVC decision data
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:N/A:H3.93.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/project-chip/connectedhomeip/issues/39173CVE reference, mitre
- https://github.com/project-chip/connectedhomeip/CVE reference, mitre
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.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.