Cleo vulnerabilities
- Cleo has 4 CVE records published between 28 Oct 2023 and 28 Oct 2026, ranking #312 of 420 vendors on this site by that count.
- Of the 4 with a CVSS score, 2 (50%) are rated critical or high; 0 (0% of all) have no CVSS score.
- 2 vulnerabilities attributed to Cleo are listed in CISA's Known Exploited Vulnerabilities (KEV) catalog; the most recent, CVE-2024-55956, was added on 17 Dec 2024.
- 2 of them (100%) are marked as known to be used in ransomware campaigns.
- For the 2 KEV entries with a published CVE record, the median time from CVE publication to KEV listing is 26 days.
Records are attributed to Cleo from the vendor named in the source records. About the data.
CVE records per year
Show data as a table
| Year | CVE records |
|---|---|
| 2017 | 0 |
| 2018 | 0 |
| 2019 | 0 |
| 2020 | 0 |
| 2021 | 0 |
| 2022 | 1 |
| 2023 | 0 |
| 2024 | 2 |
| 2025 | 0 |
| 2026 | 2 |
2026 is partial (through 28 Oct 2026), shown in a lighter bar.
| Year | Records | Critical | High | Critical or high | Not scored |
|---|---|---|---|---|---|
| 2026 | 2 | 0 | 0 | 0% | 0% |
| 2025 | 0 | 0 | 0 | — | — |
| 2024 | 2 | 2 | 0 | 100% | 0% |
| 2023 | 0 | 0 | 0 | — | — |
| 2022 | 1 | 0 | 0 | 0% | 0% |
| 2021 | 0 | 0 | 0 | — | — |
| 2020 | 0 | 0 | 0 | — | — |
| 2019 | 0 | 0 | 0 | — | — |
| 2018 | 0 | 0 | 0 | — | — |
| 2017 | 0 | 0 | 0 | — | — |
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Exploited vulnerabilities in CISA's KEV catalog
| CVE | Product | Name | Added | Ransomware |
|---|---|---|---|---|
| CVE-2024-55956 | Multiple Products | Cleo Multiple Products Unauthenticated File Upload Vulnerability | 2024-12-17 | Known |
| CVE-2024-50623 | Multiple Products | Cleo Multiple Products Unrestricted File Upload Vulnerability | 2024-12-13 | Known |
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.27, as of 27 Oct 2026. About the data.
Highest exploit-prediction scores (EPSS)
EPSS estimates the probability that a vulnerability is exploited in the next 30 days. These are the 5 highest-scoring Cleo records today.
| CVE | EPSS | Percentile | Severity | In KEV |
|---|---|---|---|---|
| CVE-2024-50623 | 98.6% | 99.9% | Critical | Yes |
| CVE-2024-55956 | 94% | 99.8% | Critical | Yes |
| CVE-2022-42966 | 1% | 62.5% | Medium | No |
| CVE-2026-84115 | 0.5% | 40.7% | Medium | No |
| CVE-2026-84114 | 0.5% | 39.6% | Medium | No |
Source: FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.27, as of 27 Oct 2026. About the data.