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Vulnerability details: VCID-7zq7-qzfp-6yav
Vulnerability ID VCID-7zq7-qzfp-6yav
Aliases CVE-2019-9894
Summary A remotely triggerable memory overwrite in RSA key exchange in PuTTY before 0.71 can occur before host key verification.
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-320 Key Management Errors
System Score Found at
epss 0.00939 https://api.first.org/data/v1/epss?cve=CVE-2019-9894
epss 0.00939 https://api.first.org/data/v1/epss?cve=CVE-2019-9894
epss 0.00939 https://api.first.org/data/v1/epss?cve=CVE-2019-9894
epss 0.00939 https://api.first.org/data/v1/epss?cve=CVE-2019-9894
epss 0.00939 https://api.first.org/data/v1/epss?cve=CVE-2019-9894
epss 0.00939 https://api.first.org/data/v1/epss?cve=CVE-2019-9894
epss 0.00939 https://api.first.org/data/v1/epss?cve=CVE-2019-9894
epss 0.00939 https://api.first.org/data/v1/epss?cve=CVE-2019-9894
epss 0.00939 https://api.first.org/data/v1/epss?cve=CVE-2019-9894
epss 0.00939 https://api.first.org/data/v1/epss?cve=CVE-2019-9894
epss 0.00939 https://api.first.org/data/v1/epss?cve=CVE-2019-9894
epss 0.00939 https://api.first.org/data/v1/epss?cve=CVE-2019-9894
epss 0.00939 https://api.first.org/data/v1/epss?cve=CVE-2019-9894
epss 0.00939 https://api.first.org/data/v1/epss?cve=CVE-2019-9894
epss 0.00939 https://api.first.org/data/v1/epss?cve=CVE-2019-9894
epss 0.00939 https://api.first.org/data/v1/epss?cve=CVE-2019-9894
cvssv2 6.4 https://nvd.nist.gov/vuln/detail/CVE-2019-9894
cvssv3 7.5 https://nvd.nist.gov/vuln/detail/CVE-2019-9894
Reference id Reference type URL
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00020.html
https://api.first.org/data/v1/epss?cve=CVE-2019-9894
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9894
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9895
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9897
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9898
https://lists.debian.org/debian-lts-announce/2019/04/msg00023.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36LWQ3NPFIV7DC7TC4KFPRYRH2OR7SZ2/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LDO3F267P347E6U2IILFCYW7JPTLCCES/
https://seclists.org/bugtraq/2019/Apr/6
https://security.netapp.com/advisory/ntap-20190404-0001/
https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
https://www.debian.org/security/2019/dsa-4423
cpe:2.3:a:netapp:oncommand_unified_manager:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:oncommand_unified_manager:-:*:*:*:*:*:*:*
cpe:2.3:a:putty:putty:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
CVE-2019-9894 https://nvd.nist.gov/vuln/detail/CVE-2019-9894
No exploits are available.
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2019-9894
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2019-9894
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.75281
EPSS Score 0.00939
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:34:14.062957+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.12/main.json 37.0.0