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

Description

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

Scores

EPSS (exploitation in 30 days)

2.4% · top 16% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

• n/a
• CWE-320 (opens in a new tab)All about CWE-320 and its CVEs

Affected products

• n/a

  • affected n/a

References (9)

• https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html (opens in a new tab)x_refsource_MISCx_transferred
• FEDORA-2019-5776dfe300 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• FEDORA-2019-9e1a1cd634 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• openSUSE-SU-2019:1113 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• openSUSE-SU-2019:1123 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 20190403 [SECURITY] [DSA 4423-1] putty security update (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• https://security.netapp.com/advisory/ntap-20190404-0001/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• DSA-4423 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• [debian-lts-announce] 20190424 [SECURITY] [DLA 1763-1] putty security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2019-9894](https://trackcve.app/badge/CVE-2019-9894.svg)](https://trackcve.app/cve/CVE-2019-9894)

Record last updated 4 Aug 2024, 22:01 UTC.