Improper Input Validation
12,281 CVEs across 261 months on the top 50 list since Feb 2005. Peak rank #1 in 7 months, last Feb 2018.
CWE-20 CVEs per month since Feb 2005
Oct 2021: 47 CVEs · rank #6Nov 2021: 89 CVEs · rank #3Dec 2021: 48 CVEs · rank #10Jan 2022: 108 CVEs · rank #3Feb 2022: 65 CVEs · rank #6Mar 2022: 49 CVEs · rank #10Apr 2022: 71 CVEs · rank #6May 2022: 77 CVEs · rank #5Jun 2022: 60 CVEs · rank #7Jul 2022: 40 CVEs · rank #10Aug 2022: 59 CVEs · rank #7Sep 2022: 64 CVEs · rank #6Oct 2022: 54 CVEs · rank #8Nov 2022: 77 CVEs · rank #5Dec 2022: 53 CVEs · rank #11Jan 2023: 65 CVEs · rank #9Feb 2023: 67 CVEs · rank #6Mar 2023: not on the top 50 that monthApr 2023: 51 CVEs · rank #5May 2023: 89 CVEs · rank #5Jun 2023: 67 CVEs · rank #6Jul 2023: 71 CVEs · rank #6Aug 2023: 89 CVEs · rank #4Sep 2023: 48 CVEs · rank #8Oct 2023: 71 CVEs · rank #6Nov 2023: 72 CVEs · rank #7Dec 2023: 57 CVEs · rank #10Jan 2024: 71 CVEs · rank #8Feb 2024: 58 CVEs · rank #13Mar 2024: 57 CVEs · rank #13Apr 2024: 68 CVEs · rank #14May 2024: 94 CVEs · rank #13Jun 2024: 46 CVEs · rank #14Jul 2024: 60 CVEs · rank #10Aug 2024: 57 CVEs · rank #15Sep 2024: 43 CVEs · rank #15Oct 2024: 46 CVEs · rank #18Nov 2024: 71 CVEs · rank #14Dec 2024: 41 CVEs · rank #17Jan 2025: 33 CVEs · rank #29Feb 2025: 72 CVEs · rank #13Mar 2025: 52 CVEs · rank #21Apr 2025: 67 CVEs · rank #15May 2025: 85 CVEs · rank #17Jun 2025: 58 CVEs · rank #20Jul 2025: 77 CVEs · rank #16Aug 2025: 64 CVEs · rank #20Sep 2025: 71 CVEs · rank #17Oct 2025: 55 CVEs · rank #21Nov 2025: 58 CVEs · rank #13Dec 2025: 93 CVEs · rank #15Jan 2026: 124 CVEs · rank #5Feb 2026: 66 CVEs · rank #25Mar 2026: 118 CVEs · rank #19Apr 2026: 122 CVEs · rank #19May 2026: 195 CVEs · rank #10Jun 2026: 367 CVEs · rank #6Jul 2026: 273 CVEs · rank #10Aug 2026: 251 CVEs · rank #12Sep 2026 so far: 164 CVEs · rank #21
Year by year
Each year's months on the top 50 list of weakness classes. Pick a year to read it in the lens.
The record
- Peak rank
- #1 in 7 months, last Feb 2018
- Busiest month
- Jun 2026, 367 CVEs
- First on the list
- Feb 2005
- On the top 50 list
- 240 of 260 monthly snapshots