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CVE-2026-11747— Reflected XSS in Seres Software's syWEB

Quick assessment

Affected
Seres Software syWEB
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.

Seres Software syWEB是土耳其Seres Software公司的一款嵌入式Web服务器中间件。 Seres Software syWEB 27082026及之前版本存在跨站脚本漏洞，该漏洞源于网页生成期间输入中和不当，容易受到反射型跨站脚本攻击。

CVSS 6.1 · Medium EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1189.001

Affected Version Matrix 1

VendorProduct Version RangeStatus
Seres Software syWEB ≤ 27082026 affected
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I. Basic Information for CVE-2026-11747

Vulnerability Information
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Vulnerability Title
Reflected XSS in Seres Software's syWEB
Source: CVE Program / CVE List V5
Vulnerability Description
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Seres Software syWEB allows Reflected XSS. This issue affects syWEB: through 27082026. NOTE: The vendor was contacted and it was learned that the product is not supported.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Seres Software syWEB 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Seres Software syWEB是土耳其Seres Software公司的一款嵌入式Web服务器中间件。 Seres Software syWEB 27082026及之前版本存在跨站脚本漏洞，该漏洞源于网页生成期间输入中和不当，容易受到反射型跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Seres Software syWEB 0 ~ 27082026 -

II. Public POCs for CVE-2026-11747

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III. Intelligence Information for CVE-2026-11747

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Vendor Advisories for CVE-2026-11747 (1)

IV. Related Vulnerabilities

Same product: syWEB
Same vendor: Seres Software
Same weakness: CWE-79

V. Comments for CVE-2026-11747

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