2021 Security Vulnerability Report
CVE Statistics for 2021

Growth Curve
There have been 16251 security vulnerabilities (CVEs) published so far in 2021. In 2020 there were 17039.

The average severity is 7.1 out of 10, which was about the same as in 2020.

Products & Vendors with the most security vulnerabilities published in 2021 Vulnerabilities may exist in multiple products or vendors

By Product

#1

Fedora Project Fedora

695 vulnerabilities in 2021

#2

Debian Linux

448 vulnerabilities in 2021

#3

Microsoft Windows Server 2016

440 vulnerabilities in 2021

#4

Microsoft Windows 10

431 vulnerabilities in 2021

#5

Microsoft Windows Server 2019

410 vulnerabilities in 2021

#6

Google Android

394 vulnerabilities in 2021

#7

Canonical Ubuntu Linux

300 vulnerabilities in 2021

#8

Microsoft Windows Server 2012

293 vulnerabilities in 2021

#9

Apple Macos

291 vulnerabilities in 2021

#10

Microsoft Windows 8.1

267 vulnerabilities in 2021

#11

Google Chrome

265 vulnerabilities in 2021

#12

Microsoft Windows Rt 8 1

257 vulnerabilities in 2021

#13

Microsoft Windows Server 2008

245 vulnerabilities in 2021

#14

Apple iOS

244 vulnerabilities in 2021

#15

Apple Mac OSX

229 vulnerabilities in 2021

#16

Microsoft Windows 7

222 vulnerabilities in 2021

#17

Google Tensorflow

167 vulnerabilities in 2021

#18

Apple iPad OS

167 vulnerabilities in 2021

#19

Apple Watch OS

166 vulnerabilities in 2021

#20

Apple TV OS

159 vulnerabilities in 2021

By Vendor

#1

Microsoft

914 vulnerabilities in 2021

#2

Google

843 vulnerabilities in 2021

#3

Fedora Project

695 vulnerabilities in 2021

#4

Red Hat

684 vulnerabilities in 2021

#5

Cisco

493 vulnerabilities in 2021

#6

Oracle

475 vulnerabilities in 2021

#7

Debian

448 vulnerabilities in 2021

#8

Apple

401 vulnerabilities in 2021

#9

Canonical

325 vulnerabilities in 2021

#10

IBM

323 vulnerabilities in 2021

#11

Adobe

273 vulnerabilities in 2021

#12

NetApp

188 vulnerabilities in 2021

#13

SAP

187 vulnerabilities in 2021

#14

Siemens

179 vulnerabilities in 2021

#15

F5 Networks

156 vulnerabilities in 2021

#16

Linux

155 vulnerabilities in 2021

#17

Apache

154 vulnerabilities in 2021

#18

GitLab

119 vulnerabilities in 2021

#19

Mozilla

115 vulnerabilities in 2021

#20
 
Aruba Networks

115 vulnerabilities in 2021

By Weakness

#1
XSS
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
2089
 
12.9%
#2
Memory Corruption
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
1050
 
6.5%
#3
Improper Privilege Management
The software does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
605
 
3.7%
#4
SQL Injection
The software constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.
533
 
3.3%
#5
Out-of-bounds Read
The software reads data past the end, or before the beginning, of the intended buffer. Typically, this can allow attackers to read sensitive information from other memory locations or cause a crash. A crash can occur when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string. The expected sentinel might not be located in the out-of-bounds memory, causing excessive data to be read, leading to a segmentation fault or a buffer overflow. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent read operation then produces undefined or unexpected results.
504
 
3.1%
#6
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
465
 
2.9%
#7
AuthZ
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
449
 
2.8%
#8
Dangling pointer
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
403
 
2.5%
#9
Directory traversal
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
372
 
2.3%
#10
Information Disclosure
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
358
 
2.2%
#11
Session Riding
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. When a web server is designed to receive a request from a client without any mechanism for verifying that it was intentionally sent, then it might be possible for an attacker to trick a client into making an unintentional request to the web server which will be treated as an authentic request. This can be done via a URL, image load, XMLHttpRequest, etc. and can result in exposure of data or unintended code execution.
326
 
2.0%
#12
Classic Buffer Overflow
The program copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. A buffer overflow condition exists when a program attempts to put more data in a buffer than it can hold, or when a program attempts to put data in a memory area outside of the boundaries of a buffer. The simplest type of error, and the most common cause of buffer overflows, is the "classic" case in which the program copies the buffer without restricting how much is copied. Other variants exist, but the existence of a classic overflow strongly suggests that the programmer is not considering even the most basic of security protections.
304
 
1.9%
#13
Command Injection
The software constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
302
 
1.9%
#14
authentification
When an actor claims to have a given identity, the software does not prove or insufficiently proves that the claim is correct.
298
 
1.8%
#15
NULL Pointer Dereference
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions.
288
 
1.8%
#16
Buffer Overflow
The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.
262
 
1.6%
#17
Shell injection
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
220
 
1.4%
#18
Resource Exhaustion
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
219
 
1.3%
#19
Unrestricted File Upload
The software allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment.
215
 
1.3%
#20
Integer Overflow or Wraparound
The software performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. An integer overflow or wraparound occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may wrap to become a very small or negative number. While this may be intended behavior in circumstances that rely on wrapping, it can have security consequences if the wrap is unexpected. This is especially the case if the integer overflow can be triggered using user-supplied inputs. This becomes security-critical when the result is used to control looping, make a security decision, or determine the offset or size in behaviors such as memory allocation, copying, concatenation, etc.
181
 
1.1%
#21
Marshaling, Unmarshaling
The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
169
 
1.0%
#22
Exposure of Resource to Wrong Sphere
The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.
152
 
0.9%
#23
XSPA
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.
149
 
0.9%
#24
Use of Hard-coded Credentials
The software contains hard-coded credentials, such as a password or cryptographic key, which it uses for its own inbound authentication, outbound communication to external components, or encryption of internal data.
133
 
0.8%
#25
Injection
The software constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. Software has certain assumptions about what constitutes data and control respectively. It is the lack of verification of these assumptions for user-controlled input that leads to injection problems. Injection problems encompass a wide variety of issues -- all mitigated in very different ways and usually attempted in order to alter the control flow of the process. For this reason, the most effective way to discuss these weaknesses is to note the distinct features which classify them as injection weaknesses. The most important issue to note is that all injection problems share one thing in common -- i.e., they allow for the injection of control plane data into the user-controlled data plane. This means that the execution of the process may be altered by sending code in through legitimate data channels, using no other mechanism. While buffer overflows, and many other flaws, involve the use of some further issue to gain execution, injection problems need only for the data to be parsed. The most classic instantiations of this category of weakness are SQL injection and format string vulnerabilities.
130
 
0.8%

By Category

Content Management

MediaWiki

39 vulnerabilities in 2021

Joomla

28 vulnerabilities in 2021

TYPO3

16 vulnerabilities in 2021

Database

Oracle MySQL

83 vulnerabilities in 2021

Couchbase Server

9 vulnerabilities in 2021

Redis Labs Redis

8 vulnerabilities in 2021

Desktop Software

Microsoft Office

53 vulnerabilities in 2021

Mozilla Thunderbird

44 vulnerabilities in 2021

Microsoft Excel

25 vulnerabilities in 2021

Development Tools

Jenkins

15 vulnerabilities in 2021

Microsoft Visual Studio

5 vulnerabilities in 2021

Oracle Java Development Kit (JDK)

4 vulnerabilities in 2021

DevOps

GitLab

118 vulnerabilities in 2021

Kubernetes

6 vulnerabilities in 2021

Docker

2 vulnerabilities in 2021

Email

Microsoft Exchange Server

28 vulnerabilities in 2021

Exim

22 vulnerabilities in 2021

Java Application Servers

Oracle Weblogic Server

24 vulnerabilities in 2021

Apache Tomcat

8 vulnerabilities in 2021

Eclipse Jetty

7 vulnerabilities in 2021

Java Libraries

FasterXML Jackson Databind

12 vulnerabilities in 2021

Libraries

Google Tensorflow

167 vulnerabilities in 2021

Microsoft .NET Core

7 vulnerabilities in 2021

OpenSSL

7 vulnerabilities in 2021

Operating Systems

Debian Linux

448 vulnerabilities in 2021

Microsoft Windows Server 2016

440 vulnerabilities in 2021

Microsoft Windows 10

431 vulnerabilities in 2021

Runtime Environments

GoLang Go

15 vulnerabilities in 2021

nodejs node.js

9 vulnerabilities in 2021

Oracle OpenJDK

5 vulnerabilities in 2021

Server Software

Microsoft Sharepoint Server

43 vulnerabilities in 2021

Microsoft Sharepoint Enterprise Server

25 vulnerabilities in 2021

OpenBSD OpenSSH

3 vulnerabilities in 2021

Virtualization

Oracle VM VirtualBox

42 vulnerabilities in 2021

QEMU

25 vulnerabilities in 2021

Citrix Xen Desktop

1 vulnerability in 2021

Web Application Framework

Django Project Django

7 vulnerabilities in 2021

Microsoft ASP.NET Core

2 vulnerabilities in 2021

Laravel

1 vulnerability in 2021

Web Applications

Apple iCloud

10 vulnerabilities in 2021

Web Browsers

Google Chrome

264 vulnerabilities in 2021

Mozilla Firefox

89 vulnerabilities in 2021

Web Servers

Apache HTTP Server

15 vulnerabilities in 2021

nginx

1 vulnerability in 2021


Report Last Updated: October 23, 2021