ISC vulnerabilities
- ISC has 63 CVE records published between 28 Oct 2023 and 28 Oct 2026, ranking #205 of 420 vendors on this site by that count.
- Of the 63 with a CVSS score, 47 (74.6%) are rated critical or high; 0 (0% of all) have no CVSS score.
- 1 vulnerability attributed to ISC is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog; the most recent, CVE-2015-5477, was added on 8 Oct 2026.
- It is marked as known to be used in ransomware campaigns.
- For the 1 KEV entry with a published CVE record, the median time from CVE publication to KEV listing is 4,089 days.
Records are attributed to ISC 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 | 33 |
| 2020 | 9 |
| 2021 | 7 |
| 2022 | 13 |
| 2023 | 9 |
| 2024 | 10 |
| 2025 | 14 |
| 2026 | 39 |
2026 is partial (through 28 Oct 2026), shown in a lighter bar.
| Year | Records | Critical | High | Critical or high | Not scored |
|---|---|---|---|---|---|
| 2026 | 39 | 0 | 26 | 66.7% | 0% |
| 2025 | 14 | 0 | 12 | 85.7% | 0% |
| 2024 | 10 | 0 | 9 | 90% | 0% |
| 2023 | 9 | 0 | 9 | 100% | 0% |
| 2022 | 13 | 0 | 7 | 53.8% | 0% |
| 2021 | 7 | 0 | 5 | 71.4% | 0% |
| 2020 | 9 | 0 | 5 | 55.6% | 0% |
| 2019 | 33 | 0 | 12 | 36.4% | 0% |
| 2018 | 0 | 0 | 0 | — | — |
| 2017 | 0 | 0 | 0 | — | — |
| Before 2017 | 2 | ||||
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-2015-5477 | BIND | ISC BIND Data Processing Errors Vulnerability | 2026-10-08 | Unknown |
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 10 highest-scoring ISC records today.
| CVE | EPSS | Percentile | Severity | In KEV |
|---|---|---|---|---|
| CVE-2015-5477 | 99.6% | 99.9% | High | Yes |
| CVE-2020-8617 | 93.3% | 99.8% | High | No |
| CVE-2021-25216 | 83% | 99.7% | High | No |
| CVE-2017-3144 | 72.7% | 99.4% | Medium | No |
| CVE-2020-8625 | 64.2% | 99.2% | High | No |
| CVE-2018-5740 | 60.2% | 99.1% | High | No |
| CVE-2022-3736 | 48.4% | 98.9% | High | No |
| CVE-1999-0043 | 44.6% | 98.8% | Critical | No |
| CVE-2017-3145 | 27.7% | 98.1% | High | No |
| CVE-2018-5733 | 20.2% | 97.5% | 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.