CVE-2025-70516

CRITICAL

9.1

CVSS v3

Description

The websocket handler of Fanvil x7a firmware version 2.6.0.1182 does not enforce proper authentication restrictions against sessionless users. The lack of restrictions grants anyone the ability to view any device resources such as operational logs or perform diagnostic requests.

CWE-306Missing Authentication for Critical Function

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploit Intelligence

0.33%probability of exploitation in 30 days

24thpercentile

Low risk: more likely to be exploited than 24% of all known CVEs.

References

Other references3

Related Vulnerabilities

Other CWE-306 (Missing Authentication for Critical Function) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-3248	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2017-10271	High	7.5	100%	KEV + Ransom	-
CVE-2023-42793	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2022-1388	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-21839	High	7.5	100%	KEV	-
CVE-2024-0012	Critical	9.8	100%	KEV + Ransom	-

Common questions

How do I fix CVE-2025-70516?

No published fix for CVE-2025-70516 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

Is CVE-2025-70516 being actively exploited?

Not that we know of. CVE-2025-70516 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.33% is the estimated probability that it will be exploited in the next 30 days. That is higher than 24% of all scored CVEs.

How severe is CVE-2025-70516?

CVE-2025-70516 has a CVSS v3 base score of 9.1, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-07.