CVE-2025-64091
CVE-2025-64091 is a high-severity vulnerability in Zenitel Tcis-3 Firmware with a CVSS 3.x base score of 8.6. 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-78.
Key facts
- Severity: High (CVSS 3.x base score 8.6)
- EPSS exploit prediction: 0% (29th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-1764
- Weakness: CWE-78
- Affected product: Zenitel Tcis-3 Firmware
- Published:
- Last modified:
Description
This vulnerability allows authenticated attackers to execute commands via the NTP-configuration of the device.
Frequently asked questions
- What is CVE-2025-64091?
- This vulnerability allows authenticated attackers to execute commands via the NTP-configuration of the device.
- How severe is CVE-2025-64091?
- CVE-2025-64091 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2025-64091 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-64091?
- CVE-2025-64091 affects Zenitel Tcis-3 Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-64091?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-64091 have an EU (EUVD) identifier?
- Yes. CVE-2025-64091 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1764.
- When was CVE-2025-64091 published?
- CVE-2025-64091 was published on 2026-01-09 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:zenitel:tcis-3_firmware:*:*:*:*:*:*:*:*
More vulnerabilities in Zenitel Tcis-3 Firmware
- CVE-2025-59818 — Critical (CVSS 10.0): This vulnerability allows authenticated attackers to execute arbitrary commands on the underlying system using the file…
- CVE-2025-64090 — Critical (CVSS 10.0): This vulnerability allows authenticated attackers to execute commands via the hostname of the device.
All CVEs affecting Zenitel Tcis-3 Firmware →
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