In PuTTY versions before 0.71 on Unix, a remotely triggerable buffer overflow exists in…
Priority MEDIUM 47CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
In PuTTY versions before 0.71 on Unix, a remotely triggerable buffer overflow exists in any kind of server-to-client forwarding.
Why it matters now
EPSS 0.02496 84th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:putty:putty:*:*:*:*:*:*:*:* | before 0.71 | Vulnerable | PuTTY |
| cpe:2.3:o:opengroup:unix:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Opengroup |
| cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:* | 28 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:* | 29 | Vulnerable | Fedoraproject |
- cpe:2.3:a:putty:putty:*:*:*:*:*:*:*:* Versions before 0.71 Vulnerable ·PuTTY
- cpe:2.3:o:opengroup:unix:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Opengroup
- cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:* Versions 28 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:* Versions 29 Vulnerable ·Fedoraproject
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2019-9895
- 2026-10-03 Alias added: GHSA-cgq7-vh72-wc5f
References
Sources
- CVE-2019-9895 · CVE Program
- CVE-2019-9895 · NVD
- FIRST EPSS
- GHSA-cgq7-vh72-wc5f · GitHub Advisory Database · CC BY 4.0
- CVE-2019-9895 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences