CVE-2025-61983

Code execution via zero-length TLV pointer advance

Published Feb 3, 2026 · Updated Feb 3, 2026

An out-of-bounds write in TP-Link Archer AX53 v1.0 firmware through 1.3.1 Build 20241120 allows authenticated adjacent attackers to execute code. In tmpServer opcode 0x442, each zero-length type-length-value field advances the destination by 0x1f bytes while consuming only eight input bytes, eventually writing beyond the 0x8000-byte global buffer. Access requires HomeShield authentication and its cloud SSH forwarding path to the localhost service; the demonstrated result is a tmpServer crash, with adjacent global corruption enabling code execution.

CVSS severity7.3
High
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds write in TP-Link Archer AX53 v1.0 firmware through 1.3.1 Build 20241120 allows authenticated adjacent attackers to execute code. In tmpServer opcode 0x442, each zero-length type-length-value field advances the destination by 0x1f bytes while consuming only eight input bytes, eventually writing beyond the 0x8000-byte global buffer. Access requires HomeShield authentication and its cloud SSH forwarding path to the localhost service; the demonstrated result is a tmpServer crash, with adjacent global corruption enabling code execution.

The record

CVE
CVE-2025-61983
Published
Feb 3, 2026
Updated
Feb 3, 2026
Vendor
TP-Link Systems Inc.
Product
Archer AX53
Classifications
CWE-122, CWE-787, CAPEC-100, T1190
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

9.1Cisco TalosCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/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

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-787Out-of-bounds Write
CAPEC-100Overflow Buffers
T1190Exploit Public-Facing Application

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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