CVE-2019-9894

Name: CVE-2019-9894
Creator: NVD / NIST
Published: 2019-03-21T16:01:17.733+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.45%

Last modified Jun 17, 2026

CVE-2019-9894 is a vulnerability of currently unknown severity. A remotely triggerable memory overwrite in RSA key exchange in PuTTY before 0.71 can occur before host key verification.. EPSS estimates a 2.45% chance of exploitation in the next 30 days.

Description

A remotely triggerable memory overwrite in RSA key exchange in PuTTY before 0.71 can occur before host key verification.

Metrics

EPSS Probability

2.45%

82.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-320

Affected Software

Vendor	Product	Versions
Putty	Putty	< 0.71
Fedoraproject	Fedora	28
Fedoraproject	Fedora	29
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Netapp	Oncommand Unified Manager	All versions
Opensuse	Leap	15.0

References

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00004.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00020.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/04/msg00023.htmlMailing List, Third Party Advisory
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/6Mailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20190404-0001/Patch, Third Party Advisory
https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.htmlThird Party Advisory
https://www.debian.org/security/2019/dsa-4423Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00004.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00020.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/04/msg00023.htmlMailing List, Third Party Advisory
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/6Mailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20190404-0001/Patch, Third Party Advisory
https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.htmlThird Party Advisory
https://www.debian.org/security/2019/dsa-4423Third Party Advisory

Timeline

Published: Mar 21, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-9894?

A remotely triggerable memory overwrite in RSA key exchange in PuTTY before 0.71 can occur before host key verification.

How severe is CVE-2019-9894?

Severity scoring for CVE-2019-9894 is pending analysis. The EPSS model estimates a 2.45% probability of exploitation in the next 30 days.

How do I fix CVE-2019-9894?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-9894?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST