Streamsoft Prestiż 18.1.376.37/18.2.377 weak password encoding

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Streamsoft Prestiż. It has been classified as problematic. Impacted is an unknown function. The manipulation leads to weak password encoding. This vulnerability is listed as CVE-2026-0809. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Streamsoft Prestiż and classified as problematic. This issue affects an unknown code block. The manipulation with an unknown input leads to a weak password encoding vulnerability. Using CWE to declare the problem leads to CWE-261. Obscuring a password with a trivial encoding does not protect the password. Impacted is confidentiality. The summary by CVE is:

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.

The weakness was presented by Kamil Dąbkowski. It is possible to read the advisory at streamsoft.pl. The identification of this vulnerability is CVE-2026-0809 since 01/09/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1552 according to MITRE ATT&CK.

Upgrading to version 20.0.380.92 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Weak password encoding
CWE: CWE-261 / CWE-257 / CWE-255
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Prestiż 20.0.380.92

Timelineinfo

01/09/2026 CVE reserved
03/12/2026 +62 days Advisory disclosed
03/12/2026 +0 days VulDB entry created
03/17/2026 +5 days VulDB entry last update

Sourcesinfo

Advisory: streamsoft.pl
Researcher: Kamil Dąbkowski
Status: Confirmed

CVE: CVE-2026-0809 (🔒)
GCVE (CVE): GCVE-0-2026-0809
GCVE (VulDB): GCVE-100-350663

Entryinfo

Created: 03/12/2026 15:36
Updated: 03/17/2026 10:31
Changes: 03/12/2026 15:36 (66), 03/17/2026 10:31 (1)
Complete: 🔍
Cache ID: 216::103

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