CVE-2023-46563Public exploitNetwork attack vector

Service interruption via formIpQoS stack overflow

Published Oct 25, 2023 · Updated Sep 11, 2024

Stack overflow in TOTOLINK X2000R Firmware 1.0.0-B20230221.0948.web allows attackers to interrupt router service via formIpQoS. The formIpQoS handler overflows a stack buffer while processing QoS request data; public sources do not identify the parameter or copy operation. Triggering the flaw requires access to the router interface; published assessments disagree on whether authentication is required.

CVSS severity9.8
Critical
EPSS probability0.81%
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 X2000R Firmware 1.0.0-B20230221.0948.web allows attackers to interrupt router service via formIpQoS. The formIpQoS handler overflows a stack buffer while processing QoS request data; public sources do not identify the parameter or copy operation. Triggering the flaw requires access to the router interface; published assessments disagree on whether authentication is required.

The record

CVE
CVE-2023-46563
Published
Oct 25, 2023
Updated
Sep 11, 2024
Vendor
TOTOLINK
Product
TOTOLINK X2000R Firmware
Classifications
CWE-121, CWE-787, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2024Record 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=1.0.0-b20230221.0948.web

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TOTOLINK · TOTOLINK X2000R Firmwareversion=1.0.0-b20230221.0948.web

Published CVSS scores

8.0CISA-ADPCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

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 exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
T1190Exploit Public-Facing Application

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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