Cyber Resilience

CWE · MITRE source

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Abstraction: Base · CVEs in our corpus: 4,292

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.

Last updated: 04 July 2026 00:28 UTC

Cumulative inbound coverage

How completely the frameworks we cross-walk collectively cover this — the verdict is the strongest single mapping (overlapping partials are not summed); breadth shows the corroboration behind it.

Collective: mostly · 17 mapping(s) from 2 framework(s): CAPEC 12 (partial) · ATT&CK 5 (mostly)

See the full cumulative-coverage rollup →

NIST 800-53 r5 controls that address this weakness (1)AI

Control Title Family Why it addresses this CWE
SC-27Platform-independent ApplicationsSCPlatform-independent managed code eliminates the need for unchecked native buffer copies that are the root cause of classic buffer overflows.

MITRE ATT&CK techniques this weakness enables

Our own two-way CWE↔ATT&CK cross-walk — a direct mapping with no public source (the CWE→CAPEC→ATT&CK chain leaves most top weaknesses, incl. XSS and SQLi, mapped to nothing). Drafted by Grok and spot-checked by Claude Opus 4.8.

Direction: ← other covers this; → this covers other (F/M/P = full / mostly / partial).

T1068 Exploitation for Privilege Escalation←M →MT1190 Exploit Public-Facing Application←P →MT1203 Exploitation for Client Execution←M →MT1210 Exploitation of Remote Services←P →MT1212 Exploitation for Credential Access←P →P

Top CVEs of this weakness type, ranked by Risk Priority

CVE Risk CVSS EPSS Published
CVE-2004-0210 KEV10.07.80.07612004-08-06
CVE-2006-2492 KEV10.08.80.48392006-05-20
CVE-2007-5659 KEV10.07.80.94222008-02-12
CVE-2010-2572 KEV10.07.80.62602010-11-10
CVE-2013-0641 KEV10.07.80.32452013-02-14
CVE-2013-1331 KEV10.07.80.81882013-06-12
CVE-2016-0099 KEV10.07.80.37162016-03-09
CVE-2016-6366 KEV10.08.80.87502016-08-18
CVE-2016-10174 KEV10.09.80.83452017-01-30
CVE-2017-7269 KEV10.09.80.99822017-03-27
CVE-2017-6862 KEV10.09.80.42702017-05-26
CVE-2018-6789 KEV10.09.80.82242018-02-08
CVE-2019-11043 KEV10.08.70.99472019-10-28
CVE-2020-15069 KEV10.09.80.10672020-06-29
CVE-2020-5135 KEV10.09.80.26872020-10-12
CVE-2020-15999 KEV10.09.60.50632020-11-03
CVE-2021-30983 KEV10.07.80.02932021-08-24
CVE-2022-37055 KEV10.09.80.57042022-08-28
CVE-2023-33009 KEV10.09.80.28142023-05-24
CVE-2023-33010 KEV10.09.80.28812023-05-24
CVE-2023-41064 KEV10.07.80.15262023-09-07
CVE-2025-31277 KEV UPD10.08.80.01482025-07-30
CVE-2025-20333 KEV10.09.90.40392025-09-25
CVE-2025-43520 KEV10.05.50.00402025-12-12
CVE-1999-00468.00.00.52811997-02-06