CVE-2026-35095

Session hijacking via unrotated client-set identifier

Published Jun 30, 2026 · Updated Jun 30, 2026

Session fixation in KTM System e-BOK before 06.2026 allows attackers to hijack an authenticated session through a fixed cookie. The application accepts a client-supplied session identifier before login and leaves its value unchanged after successful authentication. Exploitation requires planting a known cookie in the victim's browser and the victim logging in, after which the attacker can assume that authenticated session.

CVSS severity4.8
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session fixation in KTM System e-BOK before 06.2026 allows attackers to hijack an authenticated session through a fixed cookie. The application accepts a client-supplied session identifier before login and leaves its value unchanged after successful authentication. Exploitation requires planting a known cookie in the victim's browser and the victim logging in, after which the attacker can assume that authenticated session.

The record

CVE
CVE-2026-35095
Published
Jun 30, 2026
Updated
Jun 30, 2026
Vendor
KTM System
Product
e-BOK
Classifications
CWE-384, T1550.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 2026Record 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=0 <06.2026

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

KTM System · e-BOKversion=0 <06.2026

Published CVSS scores

4.8CERT.PLCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-384Session Fixation
T1550.004Use Alternate Authentication Material: 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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