CVE-2019-9896

HIGHNVD 7.87.8—Trending — 3 sources updated this weekElevated

7.8

In PuTTY versions before 0.71 on Windows, local attackers could hijack the application by putting a malicious help file in the same directory as the executable.

CVSS v3: 7.8
EG Score: 7.8(medium)
EPSS: 84.6%
KEV: Not listed

Published

March 21, 2019

Last Modified

November 21, 2024

References (8)

cve@mitrehttp://lists.opensuse.org/opensuse-security-announce/2019-04/msg00004.html
cve@mitrehttp://lists.opensuse.org/opensuse-security-announce/2019-04/msg00020.html
cve@mitrehttps://security.netapp.com/advisory/ntap-20190404-0001/
cve@mitrehttps://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00004.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00020.html
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20190404-0001/
af854a3a-2127-422b-91ae-364da2661108https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html

Weakness Classification(1)

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

CWE-427Uncontrolled Search Path Element

Data Freshness Timeline

(refreshed 13× in last 7d / 20× 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
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 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 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 21:32 UTCEG score recompute
2026-05-27 21:32 UTCGHSA enrichment
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 16:47 UTCepss_batch

Publicly available exploits

(1 reference)

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

GitHub PoCyasinyilmaz/vuln-chm-hijack
First seen May 13, 2019
Potential malicious code execution via CHM hijacking (CVE-2019-9896)
Open source ↗

Frequently asked(5)

What is CVE-2019-9896?

CVE-2019-9896 is a high vulnerability published on March 21, 2019. In PuTTY versions before 0.71 on Windows, local attackers could hijack the application by putting a malicious help file in the same directory as the executable.

When was CVE-2019-9896 disclosed?

CVE-2019-9896 was first published in the National Vulnerability Database on March 21, 2019, 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-2019-9896 actively exploited?

CVE-2019-9896 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 84.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2019-9896?

CVE-2019-9896 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2019-9896?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-9896, 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-2019-9896

📅 Published

🔄 Last Modified

🔗 References (8)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2019-9896?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (8)

Frequently asked(5)

Related CVEs(same CWE)