CVE-2025-59487Public exploit

Authenticated code execution via user-controlled TLV offset

Published Feb 3, 2026 · Updated Feb 3, 2026

Heap-based buffer overflow in TP-Link Archer AX53 v1.0 through 1.3.1 Build 20241120 allows remote authenticated users to execute code. The tmpServer opcode 0x441 handler lets TLV type 0x449 set an offset that type 0x442 uses as a static-buffer destination, creating a write-what-where condition. Reaching the service requires authentication and an adjacent-network or cloud-tunneled path; exploitation can crash tmpServer or run arbitrary code on the router.

CVSS severity7.3
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in TP-Link Archer AX53 v1.0 through 1.3.1 Build 20241120 allows remote authenticated users to execute code. The tmpServer opcode 0x441 handler lets TLV type 0x449 set an offset that type 0x442 uses as a static-buffer destination, creating a write-what-where condition. Reaching the service requires authentication and an adjacent-network or cloud-tunneled path; exploitation can crash tmpServer or run arbitrary code on the router.

The record

CVE
CVE-2025-59487
Published
Feb 3, 2026
Updated
Feb 3, 2026
Vendor
TP-Link Systems Inc.
Product
Archer AX53
Classifications
CWE-122, CWE-123, CAPEC-100, T1210
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 3, 2026Record 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=0 <=1.3.1 Build 20241120

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

TP-Link Systems Inc. · Archer AX53version=0 <=1.3.1 Build 20241120

Published CVSS scores

8.0NIST NVDCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.3TP-Link Systems Inc.CVSS:4.0/AV:A/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.1Cisco TalosCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-123Write-what-where Condition
CAPEC-100Overflow Buffers
T1210Exploitation of Remote Services

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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