Security readout for executives and security teams
Plain-English summary
CVE-2025-64055 is a critical authentication bypass reported in Fanvil x210 V2 firmware 2.12.20. An unauthenticated attacker on the local network could reach administrative functions such as file upload, firmware update, and reboot. This creates risk of device takeover or disruption where these phones are reachable from untrusted internal networks.
Executive priority
Treat as urgent for environments using the affected Fanvil model. The issue can enable administrative control without credentials from the local network, potentially disrupting communications or enabling deeper compromise. Prioritize inventory, segmentation, and vendor guidance review.
Technical view
The issue is classified as CWE-287 improper authentication. The CVSS 3.1 score is 9.8 with network attack vector, low complexity, no privileges, and no user interaction. Public data identifies crafted authentication bypass access to administrative functions on Fanvil x210 V2 2.12.20, but does not provide confirmed affected CPEs or vendor remediation details.
Likely exposure
Organizations using Fanvil x210 V2 devices running firmware 2.12.20 are the likely exposed group. Risk is highest when device management interfaces are reachable from user, guest, VoIP, or other untrusted local network segments.
Exploitation context
The CVE record and advisory describe unauthenticated local-network access to administrative functions. CISA KEV is not indicated in the provided data, and the sources do not confirm active exploitation in the wild.
Researcher notes
Evidence is limited to the CVE metadata and a public advisory reference. The source bundle names Fanvil x210 V2 2.12.20, but structured affected product data is incomplete. No vendor patch, workaround, exploit status, or KEV listing is provided in the supplied sources.
Mitigation direction
- Inventory Fanvil x210 V2 devices and identify firmware version 2.12.20.
- Check Fanvil and the public advisory for confirmed firmware updates or mitigations.
- Restrict device management access to trusted administration networks only.
- Segment VoIP devices from guest and general user networks.
- Monitor for unexpected firmware updates, reboots, or file upload activity.
Validation and detection
- Confirm whether any Fanvil x210 V2 devices are deployed.
- Record firmware versions and prioritize any running 2.12.20.
- Verify management interfaces are not reachable from untrusted local segments.
- Review administrative logs for unexpected changes, uploads, updates, or reboots.
- Track vendor guidance until a confirmed fix or workaround is published.
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-287: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. 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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program 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-2025-64055 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/SpikeReply/advisories/blob/main/cve/fanvil/cve-2025-64055.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 Authentication
Improper Authentication represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.