Accellion vulnerabilities
- No CVE records attributed to Accellion were published between 28 Oct 2023 and 28 Oct 2026.
- 4 vulnerabilities attributed to Accellion are listed in CISA's Known Exploited Vulnerabilities (KEV) catalog; the most recent, CVE-2021-27101, was added on 3 Nov 2021.
- 4 of them (100%) are marked as known to be used in ransomware campaigns.
- For the 4 KEV entries with a published CVE record, the median time from CVE publication to KEV listing is 260 days.
Records are attributed to Accellion 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 | 2 |
| 2019 | 0 |
| 2020 | 2 |
| 2021 | 4 |
| 2022 | 0 |
| 2023 | 0 |
| 2024 | 0 |
| 2025 | 0 |
| 2026 | 0 |
2026 is partial (through 28 Oct 2026), shown in a lighter bar.
| Year | Records | Critical | High | Critical or high | Not scored |
|---|---|---|---|---|---|
| 2026 | 0 | 0 | 0 | — | — |
| 2025 | 0 | 0 | 0 | — | — |
| 2024 | 0 | 0 | 0 | — | — |
| 2023 | 0 | 0 | 0 | — | — |
| 2022 | 0 | 0 | 0 | — | — |
| 2021 | 4 | 3 | 1 | 100% | 0% |
| 2020 | 2 | 0 | 0 | — | 100% |
| 2019 | 0 | 0 | 0 | — | — |
| 2018 | 2 | 0 | 0 | — | 100% |
| 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-2021-27101 | FTA | Accellion FTA SQL Injection Vulnerability | 2021-11-03 | Known |
| CVE-2021-27102 | FTA | Accellion FTA OS Command Injection Vulnerability | 2021-11-03 | Known |
| CVE-2021-27103 | FTA | Accellion FTA Server-Side Request Forgery (SSRF) Vulnerability | 2021-11-03 | Known |
| CVE-2021-27104 | FTA | Accellion FTA OS Command Injection Vulnerability | 2021-11-03 | 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 8 highest-scoring Accellion records today.
| CVE | EPSS | Percentile | Severity | In KEV |
|---|---|---|---|---|
| CVE-2021-27104 | 56.7% | 99.1% | Critical | Yes |
| CVE-2021-27103 | 11.4% | 96% | Critical | Yes |
| CVE-2016-9499 | 7.7% | 94.6% | Not scored | No |
| CVE-2021-27101 | 6% | 93.3% | Critical | Yes |
| CVE-2016-9500 | 5.4% | 92.7% | Not scored | No |
| CVE-2021-27102 | 3.7% | 89.6% | High | Yes |
| CVE-2019-5623 | 1.6% | 75.4% | Not scored | No |
| CVE-2019-5622 | 1.1% | 65.6% | Not scored | 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.