Buffer Overflow Vulnerability in NEC Corporation WebSAM WinShare
CVE-2026-113364

9.3CRITICAL

Key Information:

Vendor

Nec Corporation

Status
Websam Winshare
Vendor
CVE Published:
9 November 2026

What is CVE-2026-113364?

A buffer overflow vulnerability exists in the data receiving process of NEC Corporation's WebSAM WinShare. This flaw affects versions 7.5.0 and earlier, as well as versions 7.6.0 and 7.7.0 through 7.7.2 on Windows. An unauthenticated remote attacker could exploit this vulnerability by sending a crafted packet with a malformed data size value in the protocol header, potentially allowing the execution of arbitrary code with SYSTEM privileges.

Affected Version(s)

WebSAM WinShare Ver 7.5.0 and earlier, Ver 7.6.0 and Ver 7.7.0 through 7.7.2

References

https://jpn.nec.com/security-info/secinfo/nv26-006_en.html

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

reported by Ruslan Sayfiev and Denis Faiustov of Fujitsu Limited, and Masahiro Kawada.
.