CVE-2026-54364Network attack vector

Authentication bypass via serialized session variable injection

Published Jul 30, 2026 · Updated Jul 30, 2026

Session variable injection in Gladinet CentreStack before 17.4 allows remote attackers to bypass authentication through a crafted AccountName. SelectProvider.aspx accepts newline and tab characters in AccountName and writes them into a custom session serialization format without sanitization, allowing insertion of resellerid. No credentials or user interaction are required; the forged resellerid passes IsValidRSession and grants access to management pages.

CVSS severity6.9
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session variable injection in Gladinet CentreStack before 17.4 allows remote attackers to bypass authentication through a crafted AccountName. SelectProvider.aspx accepts newline and tab characters in AccountName and writes them into a custom session serialization format without sanitization, allowing insertion of resellerid. No credentials or user interaction are required; the forged resellerid passes IsValidRSession and grants access to management pages.

The record

CVE
CVE-2026-54364
Published
Jul 30, 2026
Updated
Jul 30, 2026
Vendor
Gladinet
Product
CentreStack
Classifications
CWE-116, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 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 <17.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gladinet · CentreStackversion=0 <17.4

Published CVSS scores

6.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
6.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A: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.

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

No observations available

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

Weakness, pattern, technique

CWE-116Improper Encoding or Escaping of Output
T1190Exploit Public-Facing Application

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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