CVE-2018-20122
CVE-2018-20122 is a critical-severity vulnerability in Fastweb Fastgate 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-78.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 10.0
- EPSS exploit prediction: 5% (91st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-78
- Affected product: Fastweb Fastgate Firmware
- Published:
- Last modified:
Description
The web interface on FASTGate Fastweb devices with firmware through 0.00.47_FW_200_Askey 2017-05-17 (software through 1.0.1b) exposed a CGI binary that is vulnerable to a command injection vulnerability that can be exploited to achieve remote code execution with root privileges. No authentication is required in order to trigger the vulnerability.
Frequently asked questions
- What is CVE-2018-20122?
- The web interface on FASTGate Fastweb devices with firmware through 0.00.47_FW_200_Askey 2017-05-17 (software through 1.0.1b) exposed a CGI binary that is vulnerable to a command injection vulnerability that can be exploited to achieve remote code execution with root privileges. No authentication is required in order to trigger the vulnerability.
- How severe is CVE-2018-20122?
- CVE-2018-20122 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-2018-20122 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-2018-20122?
- CVE-2018-20122 affects Fastweb Fastgate Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-20122?
- 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-2018-20122 published?
- CVE-2018-20122 was published on 2019-02-21 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:fastweb:fastgate_firmware:*:*:*:*:*:*:*:*
More vulnerabilities in Fastweb Fastgate Firmware
- CVE-2018-6023 — High (CVSS 8.8): Fastweb FASTgate 0.00.47 devices are vulnerable to CSRF, with impacts including Wi-Fi password changing, Guest Wi-Fi…
- CVE-2019-18661 — High (CVSS 7.5): Fastweb FASTGate 1.0.1b devices allow partial authentication bypass by changing a certain check_pwd return value from 0…
All CVEs affecting Fastweb Fastgate Firmware →
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