CVE-2026-113364 PUBLISHED

Assigner: NEC
Reserved: 20.10.2026 Published: 09.11.2026 Updated: 09.11.2026

Buffer Overflow in the data receiving process in NEC Corporation WebSAM WinShare Ver 7.5.0 and earlier, Ver 7.6.0 and Ver 7.7.0 through 7.7.2 on Windows allows a remote unauthenticated attacker to execute arbitrary code with SYSTEM privileges via a crafted packet with a malformed data size value in the protocol header.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	NEC Corporation
Product	WebSAM WinShare
Versions	Default: unaffected Version Ver 7.5.0 and earlier, Ver 7.6.0 and Ver 7.7.0 through 7.7.2 is affected

Credits

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

References

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

Problem Types

CWE-122 Heap-based buffer overflow CWE