Ajax.NET Professional vulnerabilities
- No CVE records attributed to Ajax.NET Professional were published between 28 Oct 2023 and 28 Oct 2026.
- 1 vulnerability attributed to Ajax.NET Professional is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog; the most recent, CVE-2021-23758, was added on 26 Aug 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 1,727 days.
Records are attributed to Ajax.NET Professional 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 | 1 |
| 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 | 1 | 0 | 1 | 100% | 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-2021-23758 | Ajax.NET Professional | Ajax.NET Professional Deserialization of Untrusted Data Vulnerability | 2026-08-26 | 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 1 highest-scoring Ajax.NET Professional records today.
| CVE | EPSS | Percentile | Severity | In KEV |
|---|---|---|---|---|
| CVE-2021-23758 | 82.6% | 99.7% | High | Yes |
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.