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CVE-2026-113364

Quick assessment

Affected
NEC Corporation WebSAM WinShare
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

NEC Corporation WebSAM WinShare 7.5.0 及更早版本、7.6.0 版本以及 7.7.0 至 7.7.2 版本在 Windows 平台上的数据接收过程中存在缓冲区溢出漏洞。该漏洞允许远程未认证攻击者通过构造包含协议头中畸形数据大小值的恶意数据包，以 SYSTEM 权限执行任意代码。

CVSS 9.3 · Critical
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I. Basic Information for CVE-2026-113364

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
NEC Corporation WebSAM WinShare Ver 7.5.0 and earlier, Ver 7.6.0 and Ver 7.7.0 through 7.7.2 -

II. Public POCs for CVE-2026-113364

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-113364

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Other References for CVE-2026-113364 (1)

Same Patch Batch · NEC Corporation · 2026-11-09 · 3 CVEs total

CVE-2026-113363 9.3 CRITICAL NEC WinShare 7.2-7.7.2 远程代码执行漏洞
CVE-2026-113362 8.5 HIGH NEC WebSAM Winshare 7.5.0 及更早版本访问控制漏洞

IV. Related Vulnerabilities

Same product: WebSAM WinShare
Same vendor: NEC Corporation
Same weakness: CWE-122