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Vulnerability record · CVE-2019-17069 · published 1 October 2019

CVE-2019-17069: Putty use after free vulnerability

Putty · Putty

PuTTY before 0.73 might allow remote SSH-1 servers to cause a denial of service by accessing freed memory locations via an SSH1_MSG_DISCONNECT message.

7.5 CVSS 3.1 High EPSS 2.2% · top 17.8% CWE-416 · Use after free
7.5CVSS 3.1 base score, v2 5.0
2.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
12References
17 Jun 2026Last modified by NVD

Description

PuTTY before 0.73 might allow remote SSH-1 servers to cause a denial of service by accessing freed memory locations via an SSH1_MSG_DISCONNECT message.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00020.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00021.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00030.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html
https://lists.tartarus.org/pipermail/putty-announce/2019/000029.html Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20191127-0003/ Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00020.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00021.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00030.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html
https://lists.tartarus.org/pipermail/putty-announce/2019/000029.html Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20191127-0003/ Third Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-17069), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.