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I. Basic Information for CVE-2026-0809
Vulnerability Information

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Vulnerability Title
Weak KSeF token encoding in Streamsoft Prestiż
Source: NVD (National Vulnerability Database)
Vulnerability Description
Use of a custom token encoding algorithm in Streamsoft Prestiż software allows the value of the KSeF (Krajowy System e-Faktur) token to be guessed after analyzing how tokens with know values are encoded. This issue was fixed in version 20.0.380.92.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
口令使用弱密码学算法
Source: NVD (National Vulnerability Database)
Vulnerability Title
Streamsoft Prestiz 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Streamsoft Prestiz是Streamsoft公司的一个塑料行业的 ERP 系统。 Streamsoft Prestiz存在安全漏洞,该漏洞源于使用自定义令牌编码算法,可能导致在分析已知值令牌的编码方式后猜测KSeF令牌的值。
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
VendorProductAffected VersionsCPESubscribe
StreamsoftStreamsoft Prestiż 12.2.363.17 ~ 20.0.380.92 -
II. Public POCs for CVE-2026-0809
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III. Intelligence Information for CVE-2026-0809
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IV. Related Vulnerabilities
V. Comments for CVE-2026-0809

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