Is CVE-2025-65855 in the CISA KEV catalog?

No. CVE-2025-65855 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-65855?

CVE-2025-65855 has a CVSS v3 base score of 6.6 (MEDIUM).

What is the EPSS score for CVE-2025-65855?

CVE-2025-65855 has an EPSS score of 0.08% (0th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2025-65855?

No published fix for CVE-2025-65855 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2025-65855

MEDIUM

6.6

CVSS v3

NVD

Description

The OTA firmware update mechanism in Netun Solutions HelpFlash IoT (firmware v18_178_221102_ASCII_PRO_1R5_50) uses hard-coded WiFi credentials identical across all devices and does not authenticate update servers or validate firmware signatures. An attacker with brief physical access can activate OTA mode (8-second button press), create a malicious WiFi AP using the known credentials, and serve malicious firmware via unauthenticated HTTP to achieve arbitrary code execution on this safety-critical emergency signaling device.

CWE-319 CWE-494 CWE-798Hard-coded Credentials

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.

CVSS v3 Vector

Exploitability

Attack VectorPhysical

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.08%probability of exploitation in 30 days

0thpercentile

Low risk: more likely to be exploited than 0% of all known CVEs.

References

Third-Party Advisory1

luismirandaacebedo.github.io

Product1

docs.espressif.com

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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 2026-01-06.