CVE-2023-27333

Root code execution via unchecked command copy

Published May 3, 2024 · Updated Sep 18, 2024

Stack-based buffer overflow in TP-Link Archer AX21 1.1.3 Build 20221125 allows remote authenticated users to execute code as root. The tmpServer handler for command 0x422 copies user-supplied data into a fixed-length stack buffer without first validating its length. Access to the adjacent-network service requires authentication, and successful exploitation takes control of the router with root privileges.

CVSS severity6.8
Medium
EPSS probability0.74%
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 TP-Link Archer AX21 1.1.3 Build 20221125 allows remote authenticated users to execute code as root. The tmpServer handler for command 0x422 copies user-supplied data into a fixed-length stack buffer without first validating its length. Access to the adjacent-network service requires authentication, and successful exploitation takes control of the router with root privileges.

The record

CVE
CVE-2023-27333
Published
May 3, 2024
Updated
Sep 18, 2024
Vendor
TP-Link
Product
Archer AX21
Classifications
CWE-121, T1210
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. May 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=-
  2. Affected versionversion=1.1.3 Build 20221125

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

TP-Link · Archer AX21version=-; version=1.1.3 Build 20221125

Published CVSS scores

6.8Zero Day InitiativeCVSS:3.0/AV:A/AC:L/PR:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
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

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Your stack

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