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Fencer Vulns
critical 9.8

CVE-2021-36356 in the critical feed json

KRAMER VIAware through August 2021 allows remote attackers to execute arbitrary code because ajaxPages/writeBrowseFilePathAjax.php accepts…

published 2021-08-31 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-22976

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
54.4%
EPSS 54.4% chance of exploitation in 30 days, percentile 99%
public exploits
1
Exploit-DB, plus a Nuclei check

Summary

KRAMER VIAware through August 2021 allows remote attackers to execute arbitrary code because ajaxPages/writeBrowseFilePathAjax.php accepts arbitrary executable pathnames (even though browseSystemFiles.php is no longer reachable via the GUI). NOTE: this issue exists because of an incomplete fix for CVE-2019-17124.

Timeline

  1. Published
  2. First public exploit (EDB-50856)

Exploit prediction

54.39% chance of exploitation in the next 30 days, higher than 99% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-50856 Kramer VIAware - Remote Code Execution (RCE) (Root) remote, 2022-04-07
  • Nuclei template Kramer VIAware - Remote Code Execution nuclei detection template
  • packetstormsecurity.com http://packetstormsecurity.com/files/166623/Kramer-VIAware-Remote-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-434 Unrestricted Upload of File with Dangerous Type

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.