Code execution via unchecked website-name copy
Published Apr 8, 2026 · Updated Apr 8, 2026
Stack-based buffer overflow in tmpServer in TP-Link Archer AX53 v1.0 before 1.7.1 Build 20260213 allows remote authenticated users to execute code. The opcode 0x436 handler copies website names from restored parental-control configuration into a 0x100-byte stack buffer one byte at a time without enforcing its length. Exploitation requires authenticated management access, a restored configuration containing a website name longer than 0x100 bytes, and a request for that owner's filtered-site list; the overflow can crash tmpServer or execute code on the router.
Summary
What happened
Stack-based buffer overflow in tmpServer in TP-Link Archer AX53 v1.0 before 1.7.1 Build 20260213 allows remote authenticated users to execute code. The opcode 0x436 handler copies website names from restored parental-control configuration into a 0x100-byte stack buffer one byte at a time without enforcing its length. Exploitation requires authenticated management access, a restored configuration containing a website name longer than 0x100 bytes, and a request for that owner's filtered-site list; the overflow can crash tmpServer or execute code on the router.
The record
- CVE
- CVE-2026-30814
- Published
- Apr 8, 2026
- Updated
- Apr 8, 2026
- Vendor
- TP-Link Systems Inc.
- Product
- Archer AX53
- Classifications
- CWE-121, CAPEC-100, T1190
- Attack vector
- adjacent
- Privileges
- admin
Timeline
How it unfolded
- Apr 8, 2026CVE publishedPublication date reported by the CVE source.
- Apr 8, 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.
- Affected versionversion=0 <1.7.1 Build 20260213
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- Cisco Talos opcode 0x436 proof of conceptproof of concept · demonstrated
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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