Top 50 Vendors By Total Number Of "Distinct" Vulnerabilities in 2001

Go to year: 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 All Time Leaders

	Vendor Name	Number of Vulnerabilities
1	Microsoft	172
2	IBM	59
3	SUN	57
4	Cisco	55
5	Redhat	48
6	HP	47
7	Freebsd	36
8	Debian	36
9	Mandrakesoft	35
10	Oracle	34
11	Openbsd	30
12	Linux	23
13	Suse	21
14	SCO	20
15	Caldera	20
16	Immunix	19
17	Trend Micro	17
18	Lotus	16
19	Apache	16
20	Netscape	14
21	Netbsd	14
22	SGI	13
23	Conectiva	13
24	SSH	13
25	Macromedia	13
26	Apple	12
27	GNU	12
28	Francisco Burzi	12
29	Ipswitch	11
30	Checkpoint	11
31	AOL	10
32	Mozilla	10
33	Watchguard	9
34	Novell	9
35	Compaq	9
36	Allaire	8
37	Qualcomm	8
38	Network Associates	8
39	PGP	7
40	Recourse Technologies	7
41	Iplanet	7
42	KTH	6
43	Netwin	6
44	Lucent	6
45	Beck Ipc Gmbh	6
46	ISC	6
47	Zope	6
48	Icecast	5
49	Sendmail	5
50	Texas Imperial Software	5

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