How severe is CVE-2016-3989?

CVE-2016-3989 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2016-3989 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-3989?

CVE-2016-3989 primarily affects Meinberg Ntp Server Firmware. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-3989?

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.

When was CVE-2016-3989 published?

CVE-2016-3989 was published on 2016-07-03 and last updated on 2026-06-17.

CVE-2016-3989

CVE-2016-3989 is a high-severity vulnerability in Meinberg Ntp Server Firmware with a CVSS 3.x base score of 8.1. 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-264.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 8.5
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Meinberg Ntp Server Firmware
Published: 2016-07-03
Last modified: 2026-06-17

Description

The NTP time-server interface on Meinberg IMS-LANTIME M3000, IMS-LANTIME M1000, IMS-LANTIME M500, LANTIME M900, LANTIME M600, LANTIME M400, LANTIME M300, LANTIME M200, LANTIME M100, SyncFire 1100, and LCES devices with firmware before 6.20.004 allows remote authenticated users to obtain root privileges for writing to unspecified scripts, and consequently obtain sensitive information or modify data, by leveraging access to the nobody account.

Frequently asked questions

What is CVE-2016-3989?: The NTP time-server interface on Meinberg IMS-LANTIME M3000, IMS-LANTIME M1000, IMS-LANTIME M500, LANTIME M900, LANTIME M600, LANTIME M400, LANTIME M300, LANTIME M200, LANTIME M100, SyncFire 1100, and LCES devices with firmware before 6.20.004 allows remote authenticated users to obtain root privileges for writing to unspecified scripts, and consequently obtain sensitive information or modify data, by leveraging access to the nobody account.
How severe is CVE-2016-3989?: CVE-2016-3989 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2016-3989 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-3989?: CVE-2016-3989 primarily affects Meinberg Ntp Server Firmware. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-3989?: 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.
When was CVE-2016-3989 published?: CVE-2016-3989 was published on 2016-07-03 and last updated on 2026-06-17.

References

Affected products (12)

cpe:2.3:o:meinberg:ntp_server_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:meinberg:ims-lantime_m1000:-:*:*:*:*:*:*:*
cpe:2.3:h:meinberg:ims-lantime_m3000:-:*:*:*:*:*:*:*
cpe:2.3:h:meinberg:ims-lantime_m500:-:*:*:*:*:*:*:*
cpe:2.3:h:meinberg:lantime_m100:-:*:*:*:*:*:*:*
cpe:2.3:h:meinberg:lantime_m200:-:*:*:*:*:*:*:*
cpe:2.3:h:meinberg:lantime_m300:-:*:*:*:*:*:*:*
cpe:2.3:h:meinberg:lantime_m400:-:*:*:*:*:*:*:*
cpe:2.3:h:meinberg:lantime_m600:-:*:*:*:*:*:*:*
cpe:2.3:h:meinberg:lantime_m900:-:*:*:*:*:*:*:*
cpe:2.3:h:meinberg:lces:-:*:*:*:*:*:*:*
cpe:2.3:h:meinberg:syncfire_1100:-:*:*:*:*:*:*:*

More vulnerabilities in Meinberg Ntp Server Firmware

CVE-2014-5417 — High (CVSS 7.5): Cross-site scripting (XSS) vulnerability in Meinberg NTP Server firmware on LANTIME M-Series devices 6.15.019 and…
CVE-2016-3988 — High (CVSS 7.3): Multiple stack-based buffer overflows in the NTP time-server interface on Meinberg IMS-LANTIME M3000, IMS-LANTIME…
CVE-2016-3962 — High (CVSS 7.3): Stack-based buffer overflow in the NTP time-server interface on Meinberg IMS-LANTIME M3000, IMS-LANTIME M1000,…

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