Security readout for executives and security teams
Plain-English summary
CVE-2024-35401 is a command injection issue reported in TOTOLINK CP900L firmware v4.1.5cu.798_B20221228. A vulnerable firmware upload handler may process a filename unsafely. The public record rates it medium severity. Evidence does not show known active exploitation or a named vendor patch in the supplied sources.
Executive priority
Prioritize identification and containment over emergency response unless exposed devices are broadly reachable. Medium severity and no KEV listing reduce urgency, but unmanaged router firmware can become a persistence and network-control risk.
Technical view
The issue is described as CWE-77 command injection through the FileName parameter in UploadFirmwareFile. CVSS 3.1 is 5.9 with local attack vector, low complexity, no privileges, no user interaction, and low confidentiality, integrity, and availability impact. Public affected CPE data is incomplete in the bundle.
Likely exposure
Exposure appears limited to TOTOLINK CP900L devices running firmware v4.1.5cu.798_B20221228. The CVSS vector indicates local attack requirements, but teams should still verify management-interface access paths because the flaw is in firmware upload handling.
Exploitation context
The supplied sources include a public vulnerability report, but KEV is false and no cited source states active exploitation. Treat public technical disclosure as increasing research and opportunistic testing risk, without claiming in-the-wild exploitation.
Researcher notes
The record names a specific function and parameter but lacks normalized vendor/product CPE data and patch information. Keep analysis scoped to TOTOLINK CP900L v4.1.5cu.798_B20221228 unless additional vendor evidence expands affected versions.
Mitigation direction
- Check TOTOLINK guidance for patched firmware or official mitigation.
- Inventory CP900L devices and identify firmware v4.1.5cu.798_B20221228.
- Restrict device management access to trusted administrative networks only.
- Disable unnecessary remote administration if enabled in your environment.
- Replace or isolate affected devices if no vendor fix is available.
Validation and detection
- Confirm device model and firmware version from trusted inventory records.
- Review whether CP900L management interfaces are reachable by untrusted users.
- Compare findings against CVE-2024-35401 and the linked researcher report.
- Check logs for unexpected firmware upload or management activity.
- 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-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-2024-35401 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
- 5.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L2.53.4CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
5.9MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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/s4ndw1ch136/IOT-vuln-reports/blob/main/TOTOLINK%20CP900L/UploadFirmwareFile/README.mdCVE 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.
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.