How severe is CVE-2018-18879?

CVE-2018-18879 has a CVSS 3.x base score of 8.8, 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 high.

Is CVE-2018-18879 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18879?

CVE-2018-18879 affects Columbiaweather Weather Microserver Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-18879?

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-2018-18879 published?

CVE-2018-18879 was published on 2019-06-18 and last updated on 2026-06-17.

CVE-2018-18879

CVE-2018-18879 is a high-severity vulnerability in Columbiaweather Weather Microserver Firmware with a CVSS 3.x base score of 8.8. 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-94.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Columbiaweather Weather Microserver Firmware
Published: 2019-06-18
Last modified: 2026-06-17

Description

In firmware version MS_2.6.9900 of Columbia Weather MicroServer, an authenticated web user can pipe commands directly to the underlying operating system as user input is not sanitized in networkdiags.php.

Frequently asked questions

What is CVE-2018-18879?: In firmware version MS_2.6.9900 of Columbia Weather MicroServer, an authenticated web user can pipe commands directly to the underlying operating system as user input is not sanitized in networkdiags.php.
How severe is CVE-2018-18879?: CVE-2018-18879 has a CVSS 3.x base score of 8.8, 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 high.
Is CVE-2018-18879 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18879?: CVE-2018-18879 affects Columbiaweather Weather Microserver Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-18879?: 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-2018-18879 published?: CVE-2018-18879 was published on 2019-06-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:columbiaweather:weather_microserver_firmware:ms_2.6.9900:*:*:*:*:*:*:*

More vulnerabilities in Columbiaweather Weather Microserver Firmware

CVE-2025-61939 — High (CVSS 8.8): An unused function in MicroServer can start a reverse SSH connection to a vendor registered domain, without mutual…
CVE-2018-18877 — High (CVSS 8.8): In firmware version MS_2.6.9900 of Columbia Weather MicroServer, an authenticated web user can access an alternative…
CVE-2025-66620 — High (CVSS 8.0): An unused webshell in MicroServer allows unlimited login attempts, with sudo rights on certain files and directories.…
CVE-2018-18878 — High (CVSS 7.5): In firmware version MS_2.6.9900 of Columbia Weather MicroServer, the BACnet daemon does not properly validate input,…
CVE-2018-18875 — Medium (CVSS 5.4): In firmware version MS_2.6.9900 of Columbia Weather MicroServer, a stored Cross-site scripting (XSS) vulnerability…
CVE-2018-18880 — Medium (CVSS 5.4): In firmware version MS_2.6.9900 of Columbia Weather MicroServer, a networkdiags.php reflected Cross-site scripting…

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