Skip to content
Back to Blog
medium severity December 05, 2016 · 1 min read

MrExcel Data Breach (2016)

If you are a customer of MrExcel, here’s what’s now in circulation.

In December 2016, the forum for the Microsoft Excel tips and solutions site Mr Excel suffered a data breach. The hack of the vBulletin forum led to the exposure of over 366k accounts along with email and IP addresses, dates of birth and salted passwords hashed with MD5. The owner of the MrExcel forum subsequently self-submitted the data to HIBP.

MrExcel Data Breach (2016)

What the free scan actually returns

Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

These listings are live, public, and legal to remove — and removing them is what we do.

value redacted in this sampleage, relatives, address historySpokeo
value redacted in this samplephone, household, property recordsBeenVerified
value redacted in this sample582 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach
unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

Were you a MrExcel customer?
MrExcel is one listing. Your email is probably in others.
366K accounts were exposed here. Check whether yours is one — and find every other leak tied to the same address, in about 15 seconds. No account, no card.

By running your scan you agree to the Terms and Conditions and the Privacy Policy, and to GalaxyWarden emailing you the results of this scan.

Report details & sourcing

Severity Medium
Disclosed December 05, 2016
Last reviewed July 22, 2026
Affected 366K
Data exposed Dates of birthEmail addressesIP addressesPasswordsSocial connectionsUsernamesWebsite activity
By GalaxyWarden Threat Research · Editorial & sourcing standards
Editorial & sourcing policy
GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.
Sources: Have I Been Pwned
Share this Post on X Reddit Email

Related breaches

critical January 29, 2026

Match Group (Tinder, Hinge, OkCupid) Data Breach — January 2026

ShinyHunters claimed responsibility for stealing over 10 million Match Group user records in early 2…
critical January 23, 2026

149 Million Credential Mega-Exposure — January 2026

Security researchers discovered a publicly exposed 96 GB database with 149 million unique logins cov…
high January 21, 2026

Under Armour 72M Customer Email Dataset Resurfaces — January 2026

72 million user emails from a prior Under Armour breach were reposted publicly in January 2026, ampl…