Weakness / #29
CWE-120: Classic buffer overflow in CISA KEV
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Answer 12 KEV entries list CWE-120 (Classic buffer overflow) as of catalog 2026.09.23, 0.7% of the catalog and rank 29 of 185 weaknesses. The most affected vendor is Apple (2).
- KEV entries
- 120.7% of catalog
- Vendors
- 9affected
- Ransomware: known
- 216.7%
- First added
- 2022-03-03
- Latest added
- 2026-03-20
VVendors
TAdditions by year
| Year | Added |
|---|---|
| 2021 | 0 |
| 2022 | 5 |
| 2023 | 3 |
| 2024 | 0 |
| 2025 | 3 |
| 2026 | 1 |
PProducts
| Product | Entries | Share |
|---|---|---|
| Zyxel Multiple Firewalls | 2 | 16.7% |
| Apple Multiple Products | 1 | 8.3% |
| D-Link Routers | 1 | 8.3% |
| Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense | 1 | 8.3% |
| Sophos XG Firewall | 1 | 8.3% |
| Apple iOS, iPadOS, and macOS | 1 | 8.3% |
| Microsoft Word | 1 | 8.3% |
| PHP FastCGI Process Manager (FPM) | 1 | 8.3% |
EAll entries
| CVE | Vendor | Product | Added | Ransomware |
|---|---|---|---|---|
| CVE-2025-43520 | Apple | Multiple Products | Unknown | |
| CVE-2022-37055 | D-Link | Routers | Unknown | |
| CVE-2025-20333 | Cisco | Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense | Unknown | |
| CVE-2020-15069 | Sophos | XG Firewall | Unknown | |
| CVE-2023-41064 | Apple | iOS, iPadOS, and macOS | Unknown | |
| CVE-2023-33010 | Zyxel | Multiple Firewalls | Unknown | |
| CVE-2023-33009 | Zyxel | Multiple Firewalls | Unknown | |
| CVE-2006-2492 | Microsoft | Word | Unknown | |
| CVE-2019-11043 | PHP | FastCGI Process Manager (FPM) | Known | |
| CVE-2020-5135 | SonicWall | SonicOS | Known | |
| CVE-2013-0641 | Adobe | Reader | Unknown | |
| CVE-2004-0210 | Microsoft | Windows | Unknown |
Cite this
12 CISA KEV entries list CWE-120 (Classic buffer overflow), 0.7% of the catalog. Source: Telemetry analysis of the CISA Known Exploited Vulnerabilities catalog, version 2026.09.23 (released 2026-09-23). https://glide-telemetry.pages.dev/cwe/cwe-120/
Source: CISA KEV catalog v2026.09.23, released 2026-09-23. Windows end 2026-09-23.