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Public proof of conceptFix available

CVE-2021-34805

A public proof of concept exists; no exploitation attested.

  • Published2022-01-31
  • Fixed in9.0.019.019.7
  • WeaknessCWE-22

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2022-01-3108:15CVE publishedNVD

Versions per branch

NVD
Land-software faust iserver
BranchAffectedFixed in
9.0≥ 9.0.017.017.1-3, < 9.0.019.019.79.0.019.019.7

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Land-software faust iserver to 9.0.019.019.7

Advisories and patches

Detection

read 2026-11-04 22:56 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.17.5read 2026-10-23
  • NVDCVSS 2.07.8read 2026-10-23
  • NVDweakness (CWE)CWE-22read 2026-10-23
  • FIRST EPSSEPSS score26.8 %read 2026-11-04
  • ProjectDiscoverydetectionread 2026-11-04

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2022-01-31
Last Modified
2026-06-17
NVD status
Modified

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.

Is CVE-2021-34805 actively exploited?

Active exploitation of CVE-2021-34805 has not been confirmed. Its EPSS score was 26.8% on 2026-11-04, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-34805?

CVE-2021-34805 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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