CVE-2023-46540

Unauthenticated device compromise via formNtp stack overflow

Published Oct 25, 2023 · Updated Sep 11, 2024

Stack overflow in formNtp in TOTOLINK X2000R Firmware 1.0.0-B20230221.0948.web allows remote attackers to compromise the device. Public records identify the formNtp handler but do not disclose the overflowing request field or unsafe memory-copy operation. Reachability is unauthenticated from an adjacent network, and successful exploitation can read or alter data and interrupt service.

CVSS severity9.8
Critical
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stack overflow in formNtp in TOTOLINK X2000R Firmware 1.0.0-B20230221.0948.web allows remote attackers to compromise the device. Public records identify the formNtp handler but do not disclose the overflowing request field or unsafe memory-copy operation. Reachability is unauthenticated from an adjacent network, and successful exploitation can read or alter data and interrupt service.

The record

CVE
CVE-2023-46540
Published
Oct 25, 2023
Updated
Sep 11, 2024
Vendor
TOTOLINK
Product
TOTOLINK X2000R Firmware
Classifications
CWE-787, T1210
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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
9.8NIST NVDCVSS: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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1210Exploitation of Remote Services

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo