HIGH
A remotely triggerable memory overwrite in RSA key exchange in PuTTY before 0.71 can occur before host key verification
Published Mar 21, 2019
7.5
HIGHCVSS 3.0
EPSS 2.45%
Description
A remotely triggerable memory overwrite in RSA key exchange in PuTTY before 0.71 can occur before host key verification.
Affected products
No data.
Configuration 2
OR
- 28
- 29
Configuration 3
OR
- 8.0
- 9.0
Configuration 4
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact High
Availability Impact None
6.4 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
2.45% 0.02447
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.02447
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 2.45% (0.02447) | 83.80th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.45% (0.02447) | 82.18th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.86% (0.00860) | 73.43th | v4 (v2025.03.14) |
| Dec 17, 2024 | 6.82% (0.06820) | 93.81th | v3 (v2023.03.01) |
| Sep 20, 2024 | 3.50% (0.03502) | 91.70th | v3 (v2023.03.01) |
| Aug 11, 2024 | 2.50% (0.02500) | 90.28th | v3 (v2023.03.01) |
| Mar 14, 2024 | 3.50% (0.03502) | 91.29th | v3 (v2023.03.01) |
| Nov 8, 2023 | 2.77% (0.02768) | 89.48th | v3 (v2023.03.01) |
| Jul 14, 2023 | 17.35% (0.17347) | 95.39th | v3 (v2023.03.01) |
| Mar 7, 2023 | 22.76% (0.22763) | 95.74th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 16.31% (0.16306) | 92.84th | v2 (v2022.01.01) |
| Feb 3, 2022 | 8.66% (0.08659) | 85.81th | v1 |
| Jan 6, 2022 | 8.66% (0.08659) | 85.64th | v1 |
| Jan 5, 2022 | 2.07% (0.02069) | 78.02th | v5 (v2026.06.15) |
| Apr 14, 2021 | 2.07% (0.02069) | 0.00th | v1 |
Weaknesses (1)
References (9)
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00004.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00020.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/04/msg00023.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36LWQ3NPFIV7DC7TC4KFPRYRH2OR7SZ2/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LDO3F267P347E6U2IILFCYW7JPTLCCES/ vendor-advisoryx_refsource_FEDORA
- https://seclists.org/bugtraq/2019/Apr/6 mailing-listx_refsource_BUGTRAQMailing ListThird Party Advisory
- https://security.netapp.com/advisory/ntap-20190404-0001/ x_refsource_CONFIRMPatchThird Party Advisory
- https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html x_refsource_MISCThird Party Advisory
- https://www.debian.org/security/2019/dsa-4423 vendor-advisoryx_refsource_DEBIANThird Party Advisory
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Mar 21, 2019
Updated Aug 4, 2024
Reserved Mar 20, 2019
Link CVE-2019-9894
CISA Vulnrichment
Updated n/a