CVE-2025-2859

Session hijacking via captured web cookies

Published Mar 28, 2025 · Updated Apr 4, 2025

Improper authentication in Arteche saTECH BCU firmware 2.1.3 allows remote attackers on the device network to hijack sessions via captured cookies. The published record states that network traffic exposes an active user's session cookie, but it does not identify the web endpoint or specific cookie-handling error. A user must have an active session and generate observable traffic; the stolen session permits web changes only within that user's privileges.

CVSS severity6.9
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Arteche saTECH BCU firmware 2.1.3 allows remote attackers on the device network to hijack sessions via captured cookies. The published record states that network traffic exposes an active user's session cookie, but it does not identify the web endpoint or specific cookie-handling error. A user must have an active session and generate observable traffic; the stolen session permits web changes only within that user's privileges.

The record

CVE
CVE-2025-2859
Published
Mar 28, 2025
Updated
Apr 4, 2025
Vendor
Arteche
Product
saTECH BCU
Classifications
CWE-287, T1539
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.1.3

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Arteche · saTECH BCUversion=2.1.3

Published CVSS scores

6.9INCIBE-CERTCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1539Steal Web Session Cookie

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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