How severe is CVE-2025-65855?

CVE-2025-65855 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-65855 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-65855?

CVE-2025-65855 affects Netun Helpflash Iot Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-65855?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-65855 have an EU (EUVD) identifier?

Yes. CVE-2025-65855 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203902.

When was CVE-2025-65855 published?

CVE-2025-65855 was published on 2025-12-17 and last updated on 2026-06-17.

CVE-2025-65855

CVE-2025-65855 is a medium-severity vulnerability in Netun Helpflash Iot Firmware with a CVSS 3.x base score of 6.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-319.

Key facts

Severity: Medium (CVSS 3.x base score 6.6)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-203902
Weakness: CWE-319
Affected product: Netun Helpflash Iot Firmware
Published: 2025-12-17
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-65855?: 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.
How severe is CVE-2025-65855?: CVE-2025-65855 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-65855 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-65855?: CVE-2025-65855 affects Netun Helpflash Iot Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-65855?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-65855 have an EU (EUVD) identifier?: Yes. CVE-2025-65855 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203902.
When was CVE-2025-65855 published?: CVE-2025-65855 was published on 2025-12-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:netun:helpflash_iot_firmware:18_178_221102_ascii_pro_1r5_50:*:*:*:*:*:*:*

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