Breach Intelligence Report 16 Sep 2026

15,261 Hotmail Passwords Leaked in the 15.7K Combolist File

HEROIC
HEROIC Threat Intelligence Team
Email Addresses Plaintext Password Urls
Combolist 15.7K Hotmail Combo list Full Valid uploaded by a Telegram User
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Records Exposed 15,261
Source Type Combolist
Origin United States
Password Type plaintext

The file itself is titled 15.7K Hotmail Combo List Full Valid, and HEROIC analysts confirmed it was uploaded to Telegram on August 14, 2026, containing 15,261 verified email and plaintext password pairs, each one tied to the URL where the login worked. It is a companion release to a smaller Hotmail-focused file from the same week, but this one carries the larger of the two counts.


Why a Hotmail-Specific File Deserves Attention

Because this list targets one provider instead of mixing several, the accounts inside are concentrated rather than scattered, making the file more efficient for an attacker to work through. A compromised Hotmail or Outlook login often unlocks password resets on other services tied to that inbox, extending the reach of a single leaked password.


What Was Exposed

  • Email addresses: serve as the Hotmail login identifier and a direct phishing target.
  • Plaintext passwords: readable in full, usable immediately, with no cracking step involved.
  • URLs: confirm the exact login page tied to each password, removing any guesswork for an attacker.

Why This Matters

Since these passwords are already readable and paired to a specific inbox, anyone in this file faces direct account takeover risk on their Hotmail account, plus further risk on any other account sharing that password. With over 15,000 confirmed pairs, the file supports automated testing at real scale.


How a File Like This Gets Assembled

Sellers typically filter larger breach and stealer malware collections down to one provider, verify which pairs still work, then label the result full valid before distributing it on Telegram. The advertised 15.7K figure reflects the seller's listing; HEROIC confirmed 15,261 of those records as genuine.


Is Your Hotmail Login in This File?

Use HEROIC's scan your email tool to check your address against these 15,261 records and every other leak we track. If it turns up, change your Hotmail password immediately, and change it anywhere else you reused it, prioritizing accounts linked to that inbox for password resets. Set a unique password on every account from here on so a single provider-specific leak can't reach further than it should. This check matters for a work-linked Hotmail address just as much as a personal one.

Breach Breakdown

Domain 15.7K Hotmail Combo list Full Valid uploaded by a Telegram User
Leaked Data Email Addresses,Plaintext Password,URLs
Password Types plaintext
Date Leaked 16 Sep 2026
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Private & Secure No Account Needed 2,543 scanned today
Breach Rank #N/A by affected users
Impact Score
1
sensitivity + scale + recency
Est. Financial Impact $110.4K fraud, phishing & misuse risk
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Identity Theft Risk Score

Risk Score: 8.7/10 - Critical

Data Exposure Analysis

Passwords Critical
Financial High
Personal Medium
Social High
Security Critical

Breach Timeline Analysis

March 2024 Multiple credentials exposed in recent data breach
January 2024 Password found in dark web marketplace
December 2023 Personal information leaked in major security incident

Security Recommendations

High Priority
Password Security

Critical: Change compromised passwords immediately and enable 2FA on all accounts

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