Security readout for executives and security teams
Plain-English summary
CVE-2025-64054 is a critical reflected XSS issue reported for Fanvil X210 firmware 2.12.20. A crafted request to the device web configuration upload endpoint could cause denial of service or possibly command execution. The public record is sparse, and no vendor fix is named in the provided sources.
Executive priority
Treat as urgent if Fanvil X210 2.12.20 devices are deployed, especially if management interfaces are exposed. Prioritize exposure reduction while waiting for or confirming vendor remediation.
Technical view
The issue is classified as CWE-79 and scored CVSS 9.6. The vector is network-accessible, low complexity, no privileges required, but user interaction is required. The referenced endpoint is /cgi-bin/webconfig?page=upload&action=submit. Sources describe reflected XSS with potential availability, confidentiality, and integrity impact.
Likely exposure
Organizations using Fanvil X210 devices running firmware 2.12.20 are the clearest potential exposure. Risk is higher where the web management interface is reachable from untrusted networks or where administrators can be induced to interact with crafted content.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. Public details indicate a crafted POST request is involved, but evidence is insufficient to assess exploit maturity or real-world use.
Researcher notes
Affected product metadata in the CVE bundle is incomplete despite the title naming Fanvil X210 2.12.20. Avoid broad product assumptions. The reported impact extends beyond typical reflected XSS, but public evidence is limited to the CVE description and advisory reference.
Mitigation direction
- Check Fanvil guidance and the referenced advisory for any firmware update or workaround.
- Remove public internet access to the device management interface.
- Restrict management access to trusted admin networks or VPN.
- Use network filtering to limit access to the affected web endpoint.
- Monitor for unusual requests to the webconfig upload endpoint.
Validation and detection
- Inventory Fanvil X210 devices and record firmware versions.
- Identify any devices running firmware 2.12.20.
- Confirm whether web management is exposed to untrusted networks.
- Review web logs for requests to /cgi-bin/webconfig?page=upload&action=submit.
- Track the CVE record and advisory 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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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 lookupCVE-2025-64054 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
- 9.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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:R/S:C/C:H/I:H/A:H2.86CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.6CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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/SpikeReply/advisories/blob/main/cve/fanvil/cve-2025-64054.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 Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.