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CVE-2026-9770— Hardcoded Cryptographic Key Information Disclosure Vulnerability on TP-Link Kasa EC70 and EC71

Quick assessment

Affected
TP-Link Systems Inc. Kasa EC71 v4
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 Systems Inc Kasa EC71 v4是TP-Link Systems Inc公司的一款智能家居摄像头。 TP-Link Systems Inc Kasa EC71 v4存在加密问题漏洞，该漏洞源于固件中存储了静态加密私钥且共享于设备之间，攻击者访问固件镜像可提取嵌入密钥，可能导致同一网络上的未经验证攻击者在Web管理服务中使用此密钥，破坏加密通信的机密性，实现被动解密流量或主动中间人攻击。以下版本受到影响：2.4.0 Build 20260520 rel.4191之前版本。

AI Predicted 7.5 Difficulty: Easy EPSS 0.31% · P22

Affected Version Matrix 2

VendorProduct Version RangeStatus
TP-Link Systems Inc. Kasa EC70 v4 < 2.4.0 Build 20260520 rel.4191 affected
TP-Link Systems Inc. Kasa EC71 v4 < 2.4.0 Build 20260520 rel.4191 affected
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I. Basic Information for CVE-2026-9770

Vulnerability Information
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Vulnerability Title
Hardcoded Cryptographic Key Information Disclosure Vulnerability on TP-Link Kasa EC70 and EC71
Source: CVE Program / CVE List V5
Vulnerability Description
Kasa EC71 v4 and EC70 v4 firmware contains a static cryptographic private key stored in a read-only filesystem that is shared across devices.  An attacker with access to the firmware image can extract the embedded key.  Successful exploitation may allow an unauthenticated attacker on the same network to use this key in the web management service, compromising the confidentiality of encrypted communications. This may enable passive decryption of traffic or active man-in-the-middle (MITM) attacks
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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
Vulnerability Title
TP-Link Systems Inc Kasa EC71 v4 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TP-Link Systems Inc Kasa EC71 v4是TP-Link Systems Inc公司的一款智能家居摄像头。 TP-Link Systems Inc Kasa EC71 v4存在加密问题漏洞，该漏洞源于固件中存储了静态加密私钥且共享于设备之间，攻击者访问固件镜像可提取嵌入密钥，可能导致同一网络上的未经验证攻击者在Web管理服务中使用此密钥，破坏加密通信的机密性，实现被动解密流量或主动中间人攻击。以下版本受到影响：2.4.0 Build 20260520 rel.4191之前版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TP-Link Systems Inc. Kasa EC71 v4 0 ~ 2.4.0 Build 20260520 rel.4191 -
TP-Link Systems Inc. Kasa EC70 v4 0 ~ 2.4.0 Build 20260520 rel.4191 -

II. Public POCs for CVE-2026-9770

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III. Intelligence Information for CVE-2026-9770

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Vendor Advisories for CVE-2026-9770 (1)

Vendor Pages for CVE-2026-9770 (4)

IV. Related Vulnerabilities

Same product: Kasa EC71 v4
Same vendor: TP-Link Systems Inc.
Same weakness: CWE-321

V. Comments for CVE-2026-9770

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