2021 Microsoft Exchange Server data breach

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2021 Microsoft Exchange Server data breach

Quality:

2021 Microsoft Exchange Server data breach - series of cyberattacks exploiting Microsoft's email and calendar server software. Article "2021 Microsoft Exchange Server data breach" in English Wikipedia has 60.2 points for quality (as of July 1, 2025). The article contains 92 references and 7 sections.

In this language version of Wikipedia the article has the best quality. Also, this article is the most popular in that language version.

Since the creation of article "2021 Microsoft Exchange Server data breach", its content was written by 51 registered users of English Wikipedia and edited by 87 registered Wikipedia users in all languages.

The article is cited 135 times in English Wikipedia and cited 145 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (English): #603 in March 2021
  • Global: #3376 in March 2021

The highest popularity rank from 2008:

  • Local (English): #8816 in March 2021
  • Global: #24297 in March 2021

There are 7 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2025 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

Languages with the highest quality

#LanguageQuality gradeQuality score
1English (en)
2021 Microsoft Exchange Server data breach
60.2166
2Chinese (zh)
2021年Microsoft Exchange Server数据泄露
33.8708
3Spanish (es)
Violación de datos en Microsoft Exchange Server en 2021
23.4673
4Simple English (simple)
2021 Microsoft Exchange Server data breach
22.5114
5Arabic (ar)
هجمات انترنت ضد ميكروسوفت إكستشينج 2021
22.427
6Norwegian (no)
Microsoft Exchange Server datainnbrudd i 2021
21.9898
7Dutch (nl)
Hafnium-affaire
20.5497
More...

The following table shows the most popular language versions of the article.

Most popular in all the time

The most popular language versions of the article "2021 Microsoft Exchange Server data breach" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
2021 Microsoft Exchange Server data breach
247 711
2Chinese (zh)
2021年Microsoft Exchange Server数据泄露
3 497
3Arabic (ar)
هجمات انترنت ضد ميكروسوفت إكستشينج 2021
1 864
4Simple English (simple)
2021 Microsoft Exchange Server data breach
1 254
5Spanish (es)
Violación de datos en Microsoft Exchange Server en 2021
1 161
6Dutch (nl)
Hafnium-affaire
578
7Norwegian (no)
Microsoft Exchange Server datainnbrudd i 2021
306
More...

The following table shows the language versions of the article with the highest popularity in the last month.

Most popular in June 2025

The most popular language versions of the article "2021 Microsoft Exchange Server data breach" in June 2025
#LanguagePopularity awardRelative popularity
1English (en)
2021 Microsoft Exchange Server data breach
1 298
2Simple English (simple)
2021 Microsoft Exchange Server data breach
87
3Chinese (zh)
2021年Microsoft Exchange Server数据泄露
43
4Spanish (es)
Violación de datos en Microsoft Exchange Server en 2021
19
5Arabic (ar)
هجمات انترنت ضد ميكروسوفت إكستشينج 2021
12
6Dutch (nl)
Hafnium-affaire
12
7Norwegian (no)
Microsoft Exchange Server datainnbrudd i 2021
3
More...

The following table shows the language versions of the article with the highest Authors’ Interest.

The highest AI

Language versions of the article "2021 Microsoft Exchange Server data breach" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
2021 Microsoft Exchange Server data breach
51
2Arabic (ar)
هجمات انترنت ضد ميكروسوفت إكستشينج 2021
10
3Spanish (es)
Violación de datos en Microsoft Exchange Server en 2021
6
4Norwegian (no)
Microsoft Exchange Server datainnbrudd i 2021
6
5Simple English (simple)
2021 Microsoft Exchange Server data breach
5
6Chinese (zh)
2021年Microsoft Exchange Server数据泄露
5
7Dutch (nl)
Hafnium-affaire
4
More...

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

The highest AI in June 2025

Language versions of the article "2021 Microsoft Exchange Server data breach" with the highest AI in June 2025
#LanguageAI awardRelative AI
1Arabic (ar)
هجمات انترنت ضد ميكروسوفت إكستشينج 2021
0
2English (en)
2021 Microsoft Exchange Server data breach
0
3Spanish (es)
Violación de datos en Microsoft Exchange Server en 2021
0
4Dutch (nl)
Hafnium-affaire
0
5Norwegian (no)
Microsoft Exchange Server datainnbrudd i 2021
0
6Simple English (simple)
2021 Microsoft Exchange Server data breach
0
7Chinese (zh)
2021年Microsoft Exchange Server数据泄露
0
More...

The following table shows the language versions of the article with the highest number of citations.

The highest CI

Language versions of the article "2021 Microsoft Exchange Server data breach" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1English (en)
2021 Microsoft Exchange Server data breach
135
2Chinese (zh)
2021年Microsoft Exchange Server数据泄露
5
3Norwegian (no)
Microsoft Exchange Server datainnbrudd i 2021
2
4Simple English (simple)
2021 Microsoft Exchange Server data breach
2
5Arabic (ar)
هجمات انترنت ضد ميكروسوفت إكستشينج 2021
1
6Spanish (es)
Violación de datos en Microsoft Exchange Server en 2021
0
7Dutch (nl)
Hafnium-affaire
0
More...

Scores

Estimated value for Wikipedia:
English:
Global:
Popularity in June 2025:
English:
Global:
Popularity in all years:
English:
Global:
Authors in June 2025:
English:
Global:
Registered authors in all years:
English:
Global:
Citations:
English:
Global:

Quality measures

Interwikis

#LanguageValue
arArabic
هجمات انترنت ضد ميكروسوفت إكستشينج 2021
enEnglish
2021 Microsoft Exchange Server data breach
esSpanish
Violación de datos en Microsoft Exchange Server en 2021
nlDutch
Hafnium-affaire
noNorwegian
Microsoft Exchange Server datainnbrudd i 2021
simpleSimple English
2021 Microsoft Exchange Server data breach
zhChinese
2021年Microsoft Exchange Server数据泄露

Popularity rank trends

Best Rank English:
#8816
03.2021
Global:
#24297
03.2021

AI rank trends

Best Rank English:
#603
03.2021
Global:
#3376
03.2021

Local popularity rank history

Local AI rank history

Global AI rank history

Languages comparison

Important global interconnections (July 2024 – June 2025)

Wikipedia readers most often find their way to information on 2021 Microsoft Exchange Server data breach from Wikipedia articles about List of security hacking incidents, HAFNIUM, Jake Sullivan, Microsoft Exchange Server and Zero-day. Whereas reading the article about 2021 Microsoft Exchange Server data breach people most often go to Wikipedia articles on HAFNIUM, Zero-day, Microsoft Exchange Server, 2020 United States federal government data breach and China Chopper.

Cumulative results of quality and popularity of the Wikipedia article

List of Wikipedia articles in different languages (starting with the most popular):

News from 12 August 2025

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In English Wikipedia the most popular articles on that day were: Weapons (2025 film), Danielle Spencer (American actress), Cristiano Ronaldo, Deaths in 2025, Taylor Swift, Wednesday (TV series), Superman (2025 film), Georgina Rodríguez, Coolie (2025 film), The Fantastic Four: First Steps.

About WikiRank

The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 44 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2025. When calculating current popularity and AI of articles data from June 2025 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2025... More information