CVE-2017-20200Public exploitNetwork attack vector

Wallet-address disclosure via cleartext Electrum subscriptions

Published Sep 23, 2025 · Updated Sep 23, 2025

Cleartext transmission in Coinomi 1.7.0 through 1.7.6 allows man-in-the-middle attackers to read Bitcoin wallet addresses. The Android wallet sends blockchain.address.subscribe JSON-RPC requests containing every derived Bitcoin address over an unencrypted Electrum TCP connection. An attacker able to observe the network path can associate the exposed address set with one wallet and inspect its public transaction history and balances.

CVSS severity3.7
Low
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission in Coinomi 1.7.0 through 1.7.6 allows man-in-the-middle attackers to read Bitcoin wallet addresses. The Android wallet sends blockchain.address.subscribe JSON-RPC requests containing every derived Bitcoin address over an unencrypted Electrum TCP connection. An attacker able to observe the network path can associate the exposed address set with one wallet and inspect its public transaction history and balances.

The record

CVE
CVE-2017-20200
Published
Sep 23, 2025
Updated
Sep 23, 2025
Vendor
Coinomi
Product
Coinomi
Classifications
CWE-319, CWE-310, T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 2025Record 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=1.7.0
  2. Affected versionversion=1.7.1
  3. Affected versionversion=1.7.2
  4. Affected versionversion=1.7.3
  5. Affected versionversion=1.7.4
  6. Affected versionversion=1.7.5
  7. Affected versionversion=1.7.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Coinomi · Coinomiversion=1.7.0; version=1.7.1; version=1.7.2; version=1.7.3; version=1.7.4; version=1.7.5; version=1.7.6

Published CVSS scores

2.6VulDB CNAAV:N/AC:H/Au:N/C:P/I:N/A:N
3.7VulDB CNACVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
CWE-310Cryptographic Issues
T1040Network Sniffing

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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