Security readout for executives and security teams
Plain-English summary
CVE-2025-51390 is a critical command injection flaw reported in TOTOLINK N600R firmware V4.3.0cu.7647_B20210106. An unauthenticated network attacker may be able to run system commands through the WPS PIN configuration path. This can lead to full device compromise if the vulnerable interface is reachable.
Executive priority
Treat as urgent for any organization using the named router firmware, especially at branch offices, small sites, or exposed network edges. Prioritize discovery and isolation now, then apply vendor guidance when available. Business risk is device takeover, traffic interception, and network foothold creation.
Technical view
The CVE describes CWE-78 command injection in the setWiFiWpsConfig function, specifically through the pin parameter. The CVSS 3.1 score is 9.8 with network attack vector, low complexity, no privileges, and no user interaction. Public affected-product metadata is incomplete, but the description names TOTOLINK N600R V4.3.0cu.7647_B20210106.
Likely exposure
Highest concern is internet- or untrusted-network-reachable TOTOLINK N600R devices running the named firmware. Internal exposure also matters where attackers can reach the router management or WPS configuration surface. The CVE record does not provide complete CPE or vendor-validated affected-version data.
Exploitation context
The CVE references public GitHub research and assigns a critical CVSS score. The provided sources do not show CISA KEV listing or confirmed active exploitation. Treat exploitability as plausible because the vector is unauthenticated network command injection, but do not assume observed in-the-wild exploitation from these sources alone.
Researcher notes
Public data is thin: affected CPE fields are n/a, and the CVE record relies on external GitHub references. The vulnerability is described as command injection through a WPS PIN parameter in setWiFiWpsConfig. Avoid overstating exploit activity; KEV is false in the provided bundle.
Mitigation direction
- Check TOTOLINK support channels for firmware updates or official mitigation guidance.
- Identify and prioritize N600R devices running V4.3.0cu.7647_B20210106.
- Remove router administration interfaces from internet exposure where possible.
- Restrict management access to trusted networks only.
- Monitor perimeter logs for suspicious access to router configuration endpoints.
Validation and detection
- Inventory TOTOLINK N600R devices and record firmware versions.
- Confirm whether V4.3.0cu.7647_B20210106 is deployed.
- Review firewall rules for external access to router management services.
- Check whether WPS configuration features are exposed to untrusted networks.
- Track CVE and vendor pages for updated affected-version or fix details.
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-78: 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-2025-51390 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.
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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADPVulnerability 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
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/Luanruy/qianxin/blob/main/overflow-0x41ca08.mdCVE reference, mitre
- https://github.com/Luanruy/qianxin/blob/main/CVE-2025-51390.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.