CVE-2018-9843

CRITICALNVD 9.89.8—Trending — 3 sources updated this weekElevated

9.8

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.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 92.8%
KEV: Not listed

Published

April 12, 2018

Last Modified

November 21, 2024

References (10)

cve@mitrehttp://seclists.org/fulldisclosure/2018/Apr/18
cve@mitrehttp://www.securityfocus.com/archive/1/541932/100/0/threaded
cve@mitrehttp://www.securitytracker.com/id/1040675
cve@mitrehttps://www.exploit-db.com/exploits/44429/
cve@mitrehttps://www.redteam-pentesting.de/en/advisories/rt-sa-2017-014/-cyberark-password-vault-web-access-remote-code-execution
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2018/Apr/18
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/archive/1/541932/100/0/threaded
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1040675
af854a3a-2127-422b-91ae-364da2661108https://www.exploit-db.com/exploits/44429/
af854a3a-2127-422b-91ae-364da2661108https://www.redteam-pentesting.de/en/advisories/rt-sa-2017-014/-cyberark-password-vault-web-access-remote-code-execution

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-502Deserialization of Untrusted Data

Data Freshness Timeline

(refreshed 10× in last 7d / 16× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 09:19 UTCEG score recompute
2026-05-28 09:19 UTCGHSA enrichment
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 12:51 UTCOSV refresh

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-44429
First seen Apr 9, 2018
CyberArk Password Vault Web Access < 9.9.5 / < 9.10 / 10.1 - Remote Code Execution
Open source ↗

Frequently asked(5)

What is CVE-2018-9843?

CVE-2018-9843 is a critical vulnerability published on April 12, 2018. 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.

When was CVE-2018-9843 disclosed?

CVE-2018-9843 was first published in the National Vulnerability Database on April 12, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-9843 actively exploited?

CVE-2018-9843 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 92.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-9843?

CVE-2018-9843 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2018-9843?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-9843, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2018-9843

📅 Published

🔄 Last Modified

🔗 References (10)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-9843?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (10)

Frequently asked(5)

Related CVEs(same CWE)