CVE-2019-17067
PuTTY before 0.73 on Windows improperly opens port-forwarding listening sockets, which allows...
CVE-2019-17067 is a critical vulnerability (CVSS 9.8) in Putty, published October 1, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.63%, the 76th percentile. No source names a fixed version.
- Severity
- 9.8 CriticalCVSS 3.1, NVD
- Exploit chance
- 1.63%EPSS, 76th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
PuTTY before 0.73 on Windows improperly opens port-forwarding listening sockets, which allows attackers to listen on the same port to steal an incoming connection.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
puttyUbuntu:16.04:LTS | All versions, plus listed versions 0.65-20.66-10.66-20.66-30.66-4 Show 4 moreShow less0.67-10.67-20.67-3build0.16.04.10.67-3+deb9u1build0.16.04.1 | None known |
puttyUbuntu:18.04:LTS | All versions, plus listed versions 0.70-10.70-20.70-30.70-4 | None known |
puttyUbuntu:20.04:LTS | All versions, plus listed versions 0.72-10.73-10.73-2 | None known |
puttyUbuntu:22.04:LTS | All versions, plus listed versions 0.75-30.76-10.76-2 | None known |
puttyUbuntu:24.04:LTS | All versions, plus listed versions 0.78-30.79-10.80-10.80-1build20.80-1build30.81-1 | None known |
puttyUbuntu:25.10 | All versions, plus listed versions 0.83-20.83-3 | None known |
puttyUbuntu:26.10 | All versions, plus listed versions 0.83-3build10.84-1 | None known |
puttyUbuntu:26.04:LTS | All versions, plus listed versions 0.83-30.83-3build1 | None known |
What each source reports
NVD Score used
PuTTY before 0.73 on Windows improperly opens port-forwarding listening sockets, which allows attackers to listen on the same port to steal an incoming connection.
- Record
CVE-2019-17067- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-770
- Updated
- 2026-11-02
CVE ListNo score
PuTTY before 0.73 on Windows improperly opens port-forwarding listening sockets, which allows attackers to listen on the same port to steal an incoming connection.
- Record
CVE-2019-17067- Updated
- 2026-11-02
EUVDEUVD-2019-7538No score
PuTTY before 0.73 on Windows improperly opens port-forwarding listening sockets, which allows attackers to listen on the same port to steal an incoming connection.
- Record
EUVD-2019-7538- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rfxx-g57q-7c3jNo score
PuTTY before 0.73 on Windows improperly opens port-forwarding listening sockets, which allows...
PuTTY before 0.73 on Windows improperly opens port-forwarding listening sockets, which allows attackers to listen on the same port to steal an incoming connection.
- Record
GHSA-rfxx-g57q-7c3j- Updated
- 2026-11-02
OSVUBUNTU-CVE-2019-17067
PuTTY before 0.73 on Windows improperly opens port-forwarding listening sockets, which allows attackers to listen on the same port to steal an incoming connection.
- Record
UBUNTU-CVE-2019-17067- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.