CVE-2021-34805

CVE-2021-34805 is a high-severity vulnerability in Land-software Faust Iserver with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 27% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-22.

Key facts

Description

An issue was discovered in FAUST iServer before 9.0.019.019.7. For each URL request, it accesses the corresponding .fau file on the operating system without preventing %2e%2e%5c directory traversal.

Frequently asked questions

What is CVE-2021-34805?
An issue was discovered in FAUST iServer before 9.0.019.019.7. For each URL request, it accesses the corresponding .fau file on the operating system without preventing %2e%2e%5c directory traversal.
How severe is CVE-2021-34805?
CVE-2021-34805 has a CVSS 3.x base score of 7.5, 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-2021-34805 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 27% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-34805?
CVE-2021-34805 affects Land-software Faust Iserver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-34805?
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-2021-34805 published?
CVE-2021-34805 was published on 2022-01-31 and last updated on 2026-06-17.

References

Affected products (1)

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