How severe is CVE-2025-66315?

CVE-2025-66315 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2025-66315 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66315?

CVE-2025-66315 primarily affects Zte Mf258k Pro Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-66315?

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

Does CVE-2025-66315 have an EU (EUVD) identifier?

Yes. CVE-2025-66315 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1815.

When was CVE-2025-66315 published?

CVE-2025-66315 was published on 2026-01-09 and last updated on 2026-06-17.

CVE-2025-66315

CVE-2025-66315 is a medium-severity vulnerability in Zte Mf258k Pro Firmware with a CVSS 3.x base score of 4.3. 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-863.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1815
Weakness: CWE-863
Affected product: Zte Mf258k Pro Firmware
Published: 2026-01-09
Last modified: 2026-06-17

Description

There is a configuration defect vulnerability in the version server of ZTE MF258K Pro products. Due to improper directory permission settings, an attacker can execute write permissions in a specific directory.

Frequently asked questions

What is CVE-2025-66315?: There is a configuration defect vulnerability in the version server of ZTE MF258K Pro products. Due to improper directory permission settings, an attacker can execute write permissions in a specific directory.
How severe is CVE-2025-66315?: CVE-2025-66315 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2025-66315 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66315?: CVE-2025-66315 primarily affects Zte Mf258k Pro Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-66315?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66315 have an EU (EUVD) identifier?: Yes. CVE-2025-66315 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1815.
When was CVE-2025-66315 published?: CVE-2025-66315 was published on 2026-01-09 and last updated on 2026-06-17.

References

https://support.zte.com.cn/zte-iccp-isupport-webui/bulletin/detail/4891644183717871638

Affected products (2)

cpe:2.3:o:zte:mf258k_pro_firmware:zte_mf258kpro_play_v1.0.0b03:*:*:*:*:*:*:*
cpe:2.3:o:zte:mf258k_pro_firmware:zte_mf258pro_std_v1.0.0b04:*:*:*:*:*:*:*

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