Security readout for executives and security teams
Plain-English summary
A weakness in some Intel TDX environments could let a highly privileged local attacker expose protected data and make limited integrity changes. Exploitation requires system-level access, specific conditions, and a complex attack. Availability is not affected, so the primary business concern is confidentiality in TDX-enabled infrastructure.
Executive priority
Prioritize targeted assessment rather than emergency-wide action. TDX hosts handling sensitive workloads deserve timely review because confidentiality impact can be high, but exploitation requires privileged local access, complexity, and specific conditions. Escalate remediation if Intel's advisory confirms affected versions in production.
Technical view
CVE-2025-31356 is a CWE-345 authenticity-verification weakness within the Intel TDX Ring 0 hypervisor context. A privileged system-software adversary may achieve high confidentiality impact and low integrity impact locally, without user interaction. CVSS 4.0 is 5.6, reflecting high complexity, required attack conditions, and high privileges.
Likely exposure
Exposure is limited to organizations running affected Intel TDX implementations. The supplied data does not identify affected versions, platforms, or configurations beyond referring readers to Intel's advisory. Systems without Intel TDX are not implicated by the provided sources.
Exploitation context
The attack is local, high complexity, requires privileged access, and depends on additional conditions. No user interaction is required. The supplied bundle marks the CVE as absent from KEV and provides no evidence of active exploitation or public weaponization.
Researcher notes
The CVSS 4.0 vector is AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N. The source bundle does not provide affected version ranges, technical root-cause detail beyond insufficient authenticity verification, named fixes, or exploitation indicators. Consult Intel's advisory before making version-specific conclusions.
Mitigation direction
- Inventory systems using Intel TDX and identify their platform, firmware, and hypervisor versions.
- Review Intel advisory INTEL-SA-01419 for affected-version and remediation details.
- Apply Intel and system-vendor updates according to their published guidance.
- Minimize privileged local and system-software access to TDX hosts pending remediation.
Validation and detection
- Confirm whether each host enables Intel TDX and processes sensitive workloads.
- Compare installed platform, firmware, and hypervisor versions with Intel's advisory.
- Verify recommended updates are installed and recorded in asset management.
- Review privileged access to TDX hosts for unnecessary accounts or software.
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-345: 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-2025-31356 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
- 5.6 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N
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:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N——intelVulnerability scoring details
Base CVSS 4.0 score
5.6MediumVector: CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N
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://intel.com/content/www/us/en/security-center/advisory/intel-sa-01419.htmlCVE reference, intel
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.
Insufficient Verification of Data Authenticity
Insufficient Verification of Data Authenticity represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.