CVE-2023-46556

Memory corruption via formFilter stack overflow

Published Oct 25, 2023 · Updated Sep 11, 2024

Stack-based buffer overflow in formFilter in TOTOLINK X2000R Firmware 1.0.0-B20230221.0948.web allows remote attackers to corrupt memory. The handler writes request data beyond a stack buffer; public sources do not disclose the affected input field or copy primitive. Reachability is limited to an adjacent network without privileges or user interaction, and exploitation can crash the service or alter process execution.

CVSS severity8.8
High
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in formFilter in TOTOLINK X2000R Firmware 1.0.0-B20230221.0948.web allows remote attackers to corrupt memory. The handler writes request data beyond a stack buffer; public sources do not disclose the affected input field or copy primitive. Reachability is limited to an adjacent network without privileges or user interaction, and exploitation can crash the service or alter process execution.

The record

CVE
CVE-2023-46556
Published
Oct 25, 2023
Updated
Sep 11, 2024
Vendor
TOTOLINK
Product
TOTOLINK X2000R Firmware
Classifications
CWE-787
Attack vector
adjacent
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 vectoradjacent
Required privilegesunauthenticated

What is affected?

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

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:A/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.

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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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

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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