How severe is CVE-2018-18871?

CVE-2018-18871 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-18871 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18871?

CVE-2018-18871 affects Gigasetpro Maxwell Basic Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-18871?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-18871 published?

CVE-2018-18871 was published on 2018-12-20 and last updated on 2026-06-17.

CVE-2018-18871

CVE-2018-18871 is a critical-severity vulnerability in Gigasetpro Maxwell Basic Firmware with a CVSS 3.x base score of 9.8. 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-640.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 5.0
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-640
Affected product: Gigasetpro Maxwell Basic Firmware
Published: 2018-12-20
Last modified: 2026-06-17

Description

Missing password verification in the web interface on Gigaset Maxwell Basic VoIP phones with firmware 2.22.7 would allow a remote attacker (in the same network as the device) to change the admin password without authentication (and without knowing the original password).

Frequently asked questions

What is CVE-2018-18871?: Missing password verification in the web interface on Gigaset Maxwell Basic VoIP phones with firmware 2.22.7 would allow a remote attacker (in the same network as the device) to change the admin password without authentication (and without knowing the original password).
How severe is CVE-2018-18871?: CVE-2018-18871 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-18871 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18871?: CVE-2018-18871 affects Gigasetpro Maxwell Basic Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-18871?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-18871 published?: CVE-2018-18871 was published on 2018-12-20 and last updated on 2026-06-17.

References

https://www.sit.fraunhofer.de/fileadmin/dokumente/CVE/Advisory_Gigaset_Maxwell.pdf?_=1541431343

Affected products (1)

cpe:2.3:o:gigasetpro:maxwell_basic_firmware:2.22.7:*:*:*:*:*:*:*

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