Security readout for executives and security teams
Plain-English summary
CVE-2021-31573 is a critical MediaTek Config Manager command-injection flaw affecting EN7528 and EN7580 Linux SDK versions before TLM7.3.275.0-82. An unauthenticated attacker could escalate privileges without user interaction. The provided sources do not show confirmed active exploitation.
Executive priority
Treat this as urgent for affected device fleets because unauthenticated command injection can lead to full compromise. Priority depends on whether your environment actually contains EN7528 or EN7580 firmware before the fixed SDK version.
Technical view
The issue is improper input validation in Config Manager, mapped to CWE-77. The CVSS 3.1 score is 9.8 with no privileges or user interaction required and high confidentiality, integrity, and availability impact. MediaTek identifies patch ID A20210009 and issue ID OSBNB00123234.
Likely exposure
Organizations may be exposed through products or firmware built with MediaTek EN7528 or EN7580 Linux SDK versions earlier than TLM7.3.275.0-82. The bundle does not identify downstream device brands, public routes, or deployment-specific exposure.
Exploitation context
The CVE text describes remote escalation of privilege by a proximal attacker, while the CVSS vector lists network attack vector. No KEV listing or cited source in the bundle confirms exploitation in the wild.
Researcher notes
Evidence is limited to the CVE record and MediaTek acknowledgement. The affected scope names chipsets and SDK versions, not downstream products. Avoid assuming exploit availability or specific attack paths without additional vendor or device evidence.
Mitigation direction
- Identify devices using MediaTek EN7528 or EN7580 chipsets.
- Confirm Linux SDK version with device vendors or firmware records.
- Apply vendor firmware containing MediaTek patch A20210009.
- Prioritize exposed or remotely managed devices first.
- Check MediaTek and OEM guidance for supported updates.
Validation and detection
- Inventory firmware images and vendor SBOMs for EN7528 or EN7580.
- Verify SDK version is TLM7.3.275.0-82 or later.
- Confirm OEM advisory references MediaTek patch A20210009.
- Review exposure of management or Config Manager interfaces.
- Track exceptions where vendor fix status is unknown.
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-77: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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 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-2021-31573 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://corp.mediatek.com/product-security-acknowledgementsCVE 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.
Improper Neutralization of Special Elements used in a Command ('Command Injection')
Improper Neutralization of Special Elements used in a Command ('Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.