Integer overflow in the terminal emulator in PuTTY before 0.66 allows remote attackers to…
Priority LOW 26CWE-189Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-189 and the CVSS impact.
Summary
Integer overflow in the terminal emulator in PuTTY before 0.66 allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via an ECH (erase characters) escape sequence with a large parameter value, which triggers a buffer underflow.
Why it matters now
EPSS 0.03467 89th 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:o:opensuse:leap:42.1:*:*:*:*:*:*:* | 42.1 | Vulnerable | openSUSE |
| cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:* | 13.1 | Vulnerable | openSUSE |
| cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* | 13.2 | Vulnerable | openSUSE |
| cpe:2.3:a:simon_tatham:putty:*:*:*:*:*:*:*:* | up to 0.65 | Vulnerable | Simon Tatham |
- cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:* Versions 42.1 Vulnerable ·openSUSE
- cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:* Versions 13.1 Vulnerable ·openSUSE
- cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* Versions 13.2 Vulnerable ·openSUSE
- cpe:2.3:a:simon_tatham:putty:*:*:*:*:*:*:*:* Versions up to 0.65 Vulnerable ·Simon Tatham
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2015-5309
- 2026-10-03 Alias added: GHSA-xf6h-8pvx-cg8q
References
Sources
- CVE-2015-5309 · CVE Program
- CVE-2015-5309 · NVD
- FIRST EPSS
- GHSA-xf6h-8pvx-cg8q · GitHub Advisory Database · CC BY 4.0
- CVE-2015-5309 · 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