TeamViewer vulnerabilities
- TeamViewer has 44 CVE records published between 28 Oct 2023 and 28 Oct 2026, ranking #219 of 420 vendors on this site by that count.
- Of the 44 with a CVSS score, 21 (47.7%) are rated critical or high; 0 (0% of all) have no CVSS score.
- 1 vulnerability attributed to TeamViewer is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog; the most recent, CVE-2019-18988, was added on 3 Nov 2021.
- 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 635 days.
Records are attributed to TeamViewer 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 | 1 |
| 2021 | 1 |
| 2022 | 3 |
| 2023 | 1 |
| 2024 | 7 |
| 2025 | 17 |
| 2026 | 20 |
2026 is partial (through 28 Oct 2026), shown in a lighter bar.
| Year | Records | Critical | High | Critical or high | Not scored |
|---|---|---|---|---|---|
| 2026 | 20 | 0 | 9 | 45% | 0% |
| 2025 | 17 | 0 | 7 | 41.2% | 0% |
| 2024 | 7 | 0 | 5 | 71.4% | 0% |
| 2023 | 1 | 0 | 0 | 0% | 0% |
| 2022 | 3 | 0 | 1 | 33.3% | 0% |
| 2021 | 1 | 0 | 1 | 100% | 0% |
| 2020 | 1 | 0 | 1 | 100% | 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-2019-18988 | Desktop | TeamViewer Desktop Bypass Remote Login Vulnerability | 2021-11-03 | 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 TeamViewer records today.
| CVE | EPSS | Percentile | Severity | In KEV |
|---|---|---|---|---|
| CVE-2021-34859 | 8.9% | 95.2% | High | No |
| CVE-2019-18988 | 4.7% | 91.8% | High | Yes |
| CVE-2021-34858 | 3.8% | 89.8% | High | No |
| CVE-2026-19042 | 1.8% | 78% | High | No |
| CVE-2025-64986 | 1.2% | 67.8% | High | No |
| CVE-2025-64987 | 1.2% | 67% | High | No |
| CVE-2025-64988 | 1.2% | 67% | High | No |
| CVE-2025-64989 | 1.1% | 65.6% | High | No |
| CVE-2021-35005 | 0.9% | 59.3% | Low | No |
| CVE-2025-64991 | 0.9% | 58.8% | 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.