CVE-2025-26202Public exploit

Administrator session hijacking via stored passphrase script

Published Mar 4, 2025 · Updated Mar 14, 2025

Stored XSS in DZS ZNID-GPON-2428B1-0ST firmware S4.2.022 allows remote authenticated users to hijack administrator sessions. The router stores unsanitized JavaScript in either WPA/WAPI passphrase field and renders it in the Status page password pop-up. An administrator must open the stored password display; the script then runs with that administrator's browser privileges and can perform router actions.

CVSS severity4.3
Medium
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in DZS ZNID-GPON-2428B1-0ST firmware S4.2.022 allows remote authenticated users to hijack administrator sessions. The router stores unsanitized JavaScript in either WPA/WAPI passphrase field and renders it in the Status page password pop-up. An administrator must open the stored password display; the script then runs with that administrator's browser privileges and can perform router actions.

The record

CVE
CVE-2025-26202
Published
Mar 4, 2025
Updated
Mar 14, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007, T1203
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. Mar 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 14, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3CISA ADPCVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:C/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.

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript
T1203Exploitation for Client Execution

Public exploit references

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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