CVE-2026-9592

Session hijacking via URL-exposed session token

Published Jul 17, 2026 · Updated Jul 17, 2026

Session token disclosure in SEPPmail Secure Email Gateway & SEPPmail Cloud before 15.0.4.2 allows attackers to hijack GINA portal sessions. The portal places its session token in a URL and an HTTP header, exposing a bearer value that can be captured and replayed. Exploitation requires adjacent-network access and possession of the disclosed token; replay grants the victim's GINA session but does not interrupt service.

CVSS severityUnavailable
Unscored
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session token disclosure in SEPPmail Secure Email Gateway & SEPPmail Cloud before 15.0.4.2 allows attackers to hijack GINA portal sessions. The portal places its session token in a URL and an HTTP header, exposing a bearer value that can be captured and replayed. Exploitation requires adjacent-network access and possession of the disclosed token; replay grants the victim's GINA session but does not interrupt service.

The record

CVE
CVE-2026-9592
Published
Jul 17, 2026
Updated
Jul 17, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-598, CAPEC-593, T1550.001
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 17, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5Switzerland Government Common Vulnerability ProgramCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:U

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-598Use of HTTP Request With Sensitive Query String
CAPEC-593Session Hijacking
T1550.001Use Alternate Authentication Material: Application Access Token

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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