CVE-2025-63153Public exploitNetwork attack vector

Persistent service crash via unbounded SSID decoding

Published Nov 10, 2025 · Updated Nov 10, 2025

Stack overflow in TOTOLink A7000R 9.1.0u.6115_B20201022 allows remote attackers to crash router services via a crafted request. The sub_422794 function passes the unbounded ssid value to urldecode, which writes decoded bytes into a fixed 128-byte stack buffer and can overwrite adjacent data or the return address. No authentication or user interaction is required, and successful exploitation persistently interrupts router services.

CVSS severity7.5
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in TOTOLink A7000R 9.1.0u.6115_B20201022 allows remote attackers to crash router services via a crafted request. The sub_422794 function passes the unbounded ssid value to urldecode, which writes decoded bytes into a fixed 128-byte stack buffer and can overwrite adjacent data or the return address. No authentication or user interaction is required, and successful exploitation persistently interrupts router services.

The record

CVE
CVE-2025-63153
Published
Nov 10, 2025
Updated
Nov 10, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 10, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1499.004Application or System Exploitation

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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