CVE-2023-36950

Memory corruption via loginAuth http_host overflow

Published Oct 16, 2023 · Updated Sep 12, 2024

Stack overflow in TOTOLINK X5000R 9.1.0u.6118_B20201102 and A7000R 9.1.0u.6115_B20201022 allows attackers to corrupt memory via http_host. The published record identifies loginAuth and the attacker-controlled parameter as the overflow locus but does not disclose the exact copy operation. Adjacent-network access is sufficient without authentication or user interaction; published evidence does not demonstrate code execution or persistence.

CVSS severity9.8
Critical
EPSS probability0.82%
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 X5000R 9.1.0u.6118_B20201102 and A7000R 9.1.0u.6115_B20201022 allows attackers to corrupt memory via http_host. The published record identifies loginAuth and the attacker-controlled parameter as the overflow locus but does not disclose the exact copy operation. Adjacent-network access is sufficient without authentication or user interaction; published evidence does not demonstrate code execution or persistence.

The record

CVE
CVE-2023-36950
Published
Oct 16, 2023
Updated
Sep 12, 2024
Vendor
TOTOLINK
Product
A7000R Firmware
Classifications
CWE-787, CWE-121
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 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=9.1.0u.6115_b20201022

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

TOTOLINK · A7000R Firmwareversion=9.1.0u.6115_b20201022
TOTOLINK · TOTOLINK X5000R Firmwareversion=9.1.0u.6118_b20201102

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NVDCVSS: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.

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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
CWE-121Stack-based Buffer Overflow

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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