Security readout for executives and security teams
Plain-English summary
CVE-2025-64057 affects Fanvil X210 V2 firmware 2.12.20. A nearby unauthenticated attacker on the local network could write files to unintended locations, which may let them change device configuration or disrupt operation. This is mainly a risk for exposed or poorly segmented VoIP networks, not a confirmed internet-wide exploit from the provided sources.
Executive priority
Prioritize remediation for environments using Fanvil X210 V2 phones, especially where voice networks are reachable from untrusted internal segments. Treat as high priority for segmentation review and vendor update tracking, but do not assume active exploitation from current evidence.
Technical view
The issue is a CWE-22 directory traversal vulnerability. The CVSS 3.1 score is 8.3 high, with adjacent-network attack vector, low complexity, no privileges, and no user interaction. Reported impact includes low confidentiality and high integrity and availability impact. Public data identifies Fanvil X210 V2 2.12.20; broader affected versions are not established in the provided sources.
Likely exposure
Organizations using Fanvil X210 V2 phones on firmware 2.12.20 are the clearest exposed population. Exposure is most relevant where attackers can reach the same local or adjacent network as the phones, including guest, voice, or compromised internal networks.
Exploitation context
The CVE is not listed as CISA KEV in the provided data, and no cited source confirms active exploitation. The vulnerability does not require authentication or user interaction, but the CVSS vector indicates adjacent-network access is required.
Researcher notes
Evidence is limited to the CVE record and a public advisory reference. The source bundle does not provide a vendor patch, workaround, or confirmed affected-version range beyond Fanvil X210 V2 2.12.20. Avoid extrapolating to other Fanvil models without vendor confirmation.
Mitigation direction
- Identify Fanvil X210 V2 devices and record firmware versions.
- Check Fanvil or advisory guidance for fixed firmware or official mitigations.
- Restrict phone management and device access to trusted network segments.
- Separate voice devices from guest and general user networks.
- Monitor for unexpected configuration changes or file-write indicators on affected phones.
Validation and detection
- Confirm whether any Fanvil X210 V2 devices run firmware 2.12.20.
- Review network paths that can reach affected phones from adjacent segments.
- Verify whether vendor firmware or mitigation guidance is available.
- Check device configuration baselines for unexpected changes.
- Document compensating controls if no vendor fix is available.
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-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2025-64057 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 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/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:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H2.85.5CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
8.3HighVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/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-2025-64057.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.