Security readout for executives and security teams
Plain-English summary
CVE-2021-37774 is a high-severity arbitrary code execution issue reported in TL-WDR7660 firmware version 2.0.30. A successful attacker could gain control over the affected device. The public record does not name a vendor fix, and the structured affected-product data is incomplete.
Executive priority
Prioritize identifying any affected routers because compromise could expose traffic, change routing, or disrupt network availability. Urgency is high where untrusted users share the same local network or device management is broadly reachable.
Technical view
The CVE describes arbitrary code execution in the httpProcDataSrv function of TL-WDR7660 2.0.30, mapped to CWE-94. CVSS 3.1 is 8.0 with adjacent-network access, low complexity, low privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely limited to environments running TL-WDR7660 firmware 2.0.30. The CVSS vector suggests the attacker must have adjacent-network reach and low privileges. The source bundle does not provide CPEs or a complete affected-product list.
Exploitation context
The CVE is not listed as KEV in the supplied data. A public GitHub reference exists, but the bundle does not confirm active exploitation, exploit maturity, or real-world targeting. Treat public-facing or broadly reachable management interfaces as higher risk.
Researcher notes
Evidence is sparse. The record identifies httpProcDataSrv and CWE-94 but does not describe root cause details, affected build range, authentication path, or remediation. Avoid assuming broader TL-WDR7660 versions are affected without vendor or CVE evidence.
Mitigation direction
- Check the device vendor for fixed firmware or official mitigation guidance.
- Limit management access to trusted administrative networks only.
- Remove untrusted users from networks that can reach the device interface.
- Retire or replace affected devices if no maintained firmware is available.
- Monitor affected networks for unexpected router configuration or service changes.
Validation and detection
- Inventory TL-WDR7660 devices and record firmware versions.
- Confirm whether any device runs firmware version 2.0.30.
- Verify management interfaces are not reachable from untrusted networks.
- Review vendor advisories for corrected firmware or configuration guidance.
- Document compensating controls where patch 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-94: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process 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-2021-37774 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
- 8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:L/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:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.15.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8HighVector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/fishykz/TP-POCCVE 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 Control of Generation of Code ('Code Injection')
Improper Control of Generation of Code ('Code Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.