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CWE-120

4,423 CVEs • Abstraction: Base • Likelihood of Exploit: High

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

The product 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.

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CVEs (4,423)

CVE
VENDORS
PRODUCTS
UPDATED
PUBLISHED
CVSS
2Ibm
Microsoft
2Exchange Server
Lotus Domino Mail Server
Apr 16, 2026
Jan 1, 1998
N/A· v4
N/A· v3
7.5 HIGH· v2
Denial of service to NT mail servers including Ipswitch, Mdaemon, and Exchange through a buffer overflow in the SMTP HELO command.
7Bsdi
Data GeneralDebian+4 more
8Aix
Bsd OsDebian Linux+5 more
Apr 16, 2026
Apr 26, 1997
N/A· v4
8.4 HIGH· v3
7.2 HIGH· v2
Buffer overflow in xlock program allows local users to execute commands as root.
10Bsdi
DebianDigital+7 more
10Aix
Bsd OsDebian Linux+7 more
Apr 16, 2026
Feb 6, 1997
N/A· v4
N/A· v3
10.0 HIGH· v2
Buffer overflow of rlogin program using TERM environmental variable.