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Fencer Vulns
critical 9.8

CVE-2018-9843 in the critical feed json

The REST API in CyberArk Password Vault Web Access before 9.9.5 and 10.x before 10.1 allows remote attackers to execute arbitrary code via…

published 2018-04-12 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-21437

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
16.7%
EPSS 16.7% chance of exploitation in 30 days, percentile 97%
public exploits
1
Exploit-DB

Summary

The REST API in CyberArk Password Vault Web Access before 9.9.5 and 10.x before 10.1 allows remote attackers to execute arbitrary code via a serialized .NET object in an Authorization HTTP header.

Patch / fix

  • cyberark password_vault 9.9.5, 10.1

Timeline

  1. First public exploit (EDB-44429)
  2. Published

Exploit prediction

16.70% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-44429 CyberArk Password Vault Web Access < 9.9.5 / < 9.10 / 10.1 - Remote Code Execution webapps, 2018-04-09
  • seclists.org http://seclists.org/fulldisclosure/2018/Apr/18 referenced PoC, tagged "exploit" by a source, unverified
  • redteam-pentesting.de https://www.redteam-pentesting.de/en/advisories/rt-sa-2017-014/-cyberark-password-vault-web-access-remote-code-execution referenced PoC, tagged "exploit" by a source, unverified
  • securityfocus.com http://www.securityfocus.com/archive/1/541932/100/0/threaded referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data

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.