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TI-2016-02308 Aliases CVE-2016-2563GHSA-4hmm-v4j9-3hw2

Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and…

Priority HIGH 67CWE-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

Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6.3 and earlier allows remote servers to cause a denial of service (stack memory corruption) or execute arbitrary code via a crafted SCP-SINK file-size response to an SCP download request.

Why it matters now

EPSS 0.32805 98th 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

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:9bis:kitty:*:*:*:*:*:*:*:*up to 0.66.6.3Vulnerable9bis
cpe:2.3:a:simon_tatham:putty:*:*:*:*:*:*:*:*up to 0.66VulnerableSimon Tatham
  • cpe:2.3:a:9bis:kitty:*:*:*:*:*:*:*:* Versions up to 0.66.6.3 Vulnerable ·9bis
  • cpe:2.3:a:simon_tatham:putty:*:*:*:*:*:*:*:* Versions up to 0.66 Vulnerable ·Simon Tatham

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-2563
  2. 2026-10-03 Alias added: GHSA-4hmm-v4j9-3hw2

References

Patch 1

Advisory 3

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences