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CVE-2026-102812— Hardcoded AES-128 Key and Fixed IV in Configuration Backup Encryption in TP-Link RE305 and Archer C7

Quick assessment

Affected

TP-Link Systems Inc. RE305 v3

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TP-Link RE305 V3 和 Archer C7 V5 的用户配置备份机制中存在硬编码加密密钥漏洞。固件的配置管理组件中嵌入了固定的 AES-128 密钥和初始化向量（IV）。若攻击者获取了受影响的配置备份文件，便可从固件中提取该加密材料，并据此对备份文件进行解密。成功利用此漏洞可能泄露备份文件中包含的敏感配置信息，例如管理员密码和 Wi-Fi 凭证。

CVSS 6.9 · Medium Updated Oct 28, 2026

Possible ATT&CK Techniques 3 AI

T1552 · Unsecured Credentials T1003 · OS Credential Dumping T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

Vendor	Product	Version Range	Status
TP-Link Systems Inc.	Archer C7 v5	`< 1.3.1 Build 20260821 Rel. 41256`	affected
TP-Link Systems Inc.	RE305 v3	`< 1.1.8 Build 20260921 Rel. 42853`	affected

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Vulnerability Information

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Vulnerability Title

Hardcoded AES-128 Key and Fixed IV in Configuration Backup Encryption in TP-Link RE305 and Archer C7

Source: CVE Program / CVE List V5

Vulnerability Description

A hard-coded cryptographic key vulnerability exists in the user-configuration backup mechanism of TP-Link RE305 V3 and Archer C7 V5. A fixed AES-128 key and initialization vector are embedded in the firmware configuration-management component. An attacker who obtains an affected configuration backup file may extract the cryptographic material from the firmware and use it to decrypt the backup. Successful exploitation may disclose sensitive configuration information contained in a backup file, including administrator passwords and Wi-Fi credentials.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Source: CVE Program / CVE List V5

Vulnerability Type

使用硬编码的密码学密钥

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
TP-Link Systems Inc.	RE305 v3	0 ~ 1.1.8 Build 20260921 Rel. 42853	-
TP-Link Systems Inc.	Archer C7 v5	0 ~ 1.3.1 Build 20260821 Rel. 41256	-

II. Public POCs for CVE-2026-102812

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-102812

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Vendor Advisories for CVE-2026-102812 (1)

🔗 Security Advisory: Multiple Vulnerabilities in TP-Link RE305 and Archer C7 (CVE-2026-18330, CVE-2026-102812, CVE-2026-102813, CVE-2026-102814, CVE-2026-102815 & CVE-2026-102816) Read full article vendor-advisory

Vendor Pages for CVE-2026-102812 (4)

🔗 Download for Archer C7 | TP-Link patch
🔗 Download for RE305 | TP-Link patch
🔗 Download for Archer C7 | TP-Link Read full article patch
🔗 Download for RE305 | TP-Link patch

https://www.cve.org/CVERecord?id=CVE-2026-102812

Same Patch Batch · TP-Link Systems Inc. · 2026-10-27 · 5 CVEs total

CVE-2026-102814	8.7 HIGH	Improper Authentication in TP-Link TDDP v2 Allows Root Command Execution in TP-Link RE305
CVE-2026-102815	6.9 MEDIUM	Command Injection in tmpServer Allows Local Privilege Escalation in TP-Link RE305
CVE-2026-102813	6.1 MEDIUM	Administrator Password Reset Through the Verification-Code Interface in TP-Link RE305
CVE-2026-102816	5.3 MEDIUM	Unauthenticated Wireless Regulatory Region Configuration in TP-Link RE305

IV. Related Vulnerabilities

Same product: RE305 v3

Same vendor: TP-Link Systems Inc.

Same weakness: CWE-321