Security readout for executives and security teams
Plain-English summary
CVE-2021-31575 is a critical command injection flaw in MediaTek Config Manager affecting EN7528 and EN7580 Linux SDK builds before TLM7.3.275.0-82. A successful attacker could gain remote elevated privileges without authentication or user interaction. The provided sources do not identify specific branded devices.
Executive priority
Treat this as urgent for any environment using MediaTek EN7528 or EN7580 based devices, especially internet-facing or broadly reachable infrastructure. The main business task is supply-chain confirmation: identify affected devices, obtain vendor-fixed firmware, and reduce exposure while waiting for validated updates.
Technical view
The CVE describes improper input validation in Config Manager, classified as CWE-77 command injection. MediaTek lists affected EN7528 and EN7580 Linux SDK versions below TLM7.3.275.0-82, with patch ID A20210009 and issue ID OSBNB00123234. CVSS 3.1 is 9.8 with network attack vector, low complexity, no privileges, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely in embedded or network devices built on MediaTek EN7528 or EN7580 using the vulnerable Linux SDK. The bundle does not map the SDK to specific end-user product models, so organizations need OEM, ODM, SBOM, or firmware evidence to confirm scope.
Exploitation context
The provided data does not show CISA KEV listing or active exploitation evidence. The risk remains high because the CVSS vector indicates unauthenticated, no-user-interaction network exploitation with full impact. The source description also says proximal attacker, creating ambiguity that should be resolved through vendor guidance.
Researcher notes
Do not assume all MediaTek products are affected. The source bundle names only EN7528 and EN7580 Linux SDK versions below TLM7.3.275.0-82. No exploit details, product model mapping, or active exploitation evidence are provided. The network-vector CVSS and proximal-attacker wording should be reconciled against MediaTek or OEM advisories.
Mitigation direction
- Apply MediaTek patch ID A20210009 through the OEM or firmware supply chain.
- Upgrade affected SDK or firmware to TLM7.3.275.0-82 or later where available.
- Ask device vendors whether shipped firmware includes OSBNB00123234 fixes.
- Restrict management access to affected devices until firmware status is confirmed.
- Monitor vendor advisories for device-specific fixed firmware and deployment instructions.
Validation and detection
- Inventory devices or firmware using MediaTek EN7528 or EN7580 chipsets.
- Confirm Linux SDK version from vendor documentation, SBOMs, or firmware release notes.
- Check whether firmware references patch A20210009 or issue OSBNB00123234.
- Verify exposed management interfaces are limited to trusted networks.
- Track remediation status by device model, firmware version, and vendor confirmation.
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-2021-31575 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.