CVE-2026-113364

Untrusted Input Buffer Overflow in NEC WebSAM WinShare 7.5–7.7.x Enables Remote Code Execution

Published Nov 9, 2026 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Nec
Nec websam Winshare
Vendors & Products Nec
Nec websam Winshare
Type Values Removed Values Added
Title Untrusted Input Buffer Overflow in NEC WebSAM WinShare 7.5–7.7.x Enables Remote Code Execution
Type Values Removed Values Added
Description 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.
Weaknesses CWE-122
References
Metrics cvssV4_0

{'score': 9.3, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
NEC
Published
Updated
Nov 10, 2026, 2:09 PM
Reserved
Oct 20, 2026, 1:52 AM
Status
Deferred
Published
Nov 9, 2026, 5:18 AM
Modified
Nov 12, 2026, 10:11 PM