CVE-2026-9770Public exploit

Credential interception via fleet-wide private key

Published Jul 15, 2026 · Updated Jul 15, 2026

Hardcoded key exposure in TP-Link Kasa EC70 v4 and EC71 v4 before 2.4.0 Build 20260520 rel.4191 allows remote attackers to intercept traffic. Two SquashFS layers store fleet-wide RSA private keys, and local TLS endpoints serve the certificate for the active 2048-bit key. Access to an affected firmware image and the same network is required; the key supports traffic decryption, while public research did not demonstrate active interception.

CVSS severity8.6
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hardcoded key exposure in TP-Link Kasa EC70 v4 and EC71 v4 before 2.4.0 Build 20260520 rel.4191 allows remote attackers to intercept traffic. Two SquashFS layers store fleet-wide RSA private keys, and local TLS endpoints serve the certificate for the active 2048-bit key. Access to an affected firmware image and the same network is required; the key supports traffic decryption, while public research did not demonstrate active interception.

The record

CVE
CVE-2026-9770
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
TP-Link Systems Inc.
Product
Kasa EC70
Classifications
CWE-321, CAPEC-474, T1557
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.4.0 Build 20260520 rel.4191

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

TP-Link Systems Inc. · Kasa EC70version=0 <2.4.0 Build 20260520 rel.4191
TP-Link Systems Inc. · Kasa EC71version=0 <2.4.0 Build 20260520 rel.4191

Published CVSS scores

8.6TP-Link Systems Inc.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

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-321Use of Hard-coded Cryptographic Key
CAPEC-474Signature Spoofing by Key Theft
T1557Adversary-in-the-Middle

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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