Synacor vulnerabilities
- Synacor has 8 CVE records published between 28 Oct 2023 and 28 Oct 2026, ranking #290 of 420 vendors on this site by that count.
- Of the 8 with a CVSS score, 5 (62.5%) are rated critical or high; 0 (0% of all) have no CVSS score.
- 19 vulnerabilities attributed to Synacor are listed in CISA's Known Exploited Vulnerabilities (KEV) catalog; the most recent, CVE-2026-73570, was added on 21 Aug 2026.
- 6 of them (31.6%) are marked as known to be used in ransomware campaigns.
- For the 19 KEV entries with a published CVE record, the median time from CVE publication to KEV listing is 113 days.
Records are attributed to Synacor 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 | 1 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 0 |
| 2022 | 8 |
| 2023 | 2 |
| 2024 | 3 |
| 2025 | 3 |
| 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 | 2 | 100% | 0% |
| 2025 | 3 | 0 | 1 | 33.3% | 0% |
| 2024 | 3 | 2 | 0 | 66.7% | 0% |
| 2023 | 2 | 1 | 0 | 50% | 0% |
| 2022 | 8 | 3 | 2 | 71.4% | 12.5% |
| 2021 | 0 | 0 | 0 | — | — |
| 2020 | 1 | 1 | 0 | 100% | 0% |
| 2019 | 2 | 1 | 1 | 100% | 0% |
| 2018 | 1 | 0 | 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-2026-73570 | Zimbra Collaboration Suite (ZCS) | Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerability | 2026-08-21 | Unknown |
| CVE-2025-48700 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability | 2026-04-20 | Unknown |
| CVE-2025-66376 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting Vulnerability | 2026-03-18 | Unknown |
| CVE-2020-7796 | Zimbra Collaboration Suite | Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery Vulnerability | 2026-02-17 | Unknown |
| CVE-2025-68645 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) PHP Remote File Inclusion Vulnerability | 2026-01-22 | Unknown |
| CVE-2025-27915 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability | 2025-10-07 | Unknown |
| CVE-2019-9621 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery (SSRF) Vulnerability | 2025-07-07 | Unknown |
| CVE-2024-27443 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability | 2025-05-19 | Unknown |
| CVE-2023-34192 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability | 2025-02-25 | Unknown |
| CVE-2024-45519 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Command Execution Vulnerability | 2024-10-03 | Unknown |
| CVE-2023-37580 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability | 2023-07-27 | Unknown |
| CVE-2022-27926 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability | 2023-04-03 | Unknown |
| CVE-2022-41352 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability | 2022-10-20 | Known |
| CVE-2022-27925 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability | 2022-08-11 | Known |
| CVE-2022-37042 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability | 2022-08-11 | Known |
| CVE-2022-27924 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Command Injection Vulnerability | 2022-08-04 | Known |
| CVE-2018-6882 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability | 2022-04-19 | Known |
| CVE-2022-24682 | Zimbra Collaborate Suite (ZCS) | Synacor Zimbra Collaborate Suite (ZCS) Cross-Site Scripting Vulnerability | 2022-02-25 | Known |
| CVE-2019-9670 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Reference | 2022-01-10 | 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 Synacor records today.
| CVE | EPSS | Percentile | Severity | In KEV |
|---|---|---|---|---|
| CVE-2019-9670 | 100% | 100% | Critical | Yes |
| CVE-2024-45519 | 99.9% | 100% | Critical | Yes |
| CVE-2022-27925 | 98.7% | 99.9% | High | Yes |
| CVE-2022-41352 | 95.5% | 99.9% | Critical | Yes |
| CVE-2022-27924 | 93.9% | 99.8% | Critical | Yes |
| CVE-2020-7796 | 93.6% | 99.8% | Critical | Yes |
| CVE-2022-37042 | 92.1% | 99.8% | Critical | Yes |
| CVE-2019-9621 | 81% | 99.6% | High | Yes |
| CVE-2023-34192 | 77.3% | 99.6% | Critical | Yes |
| CVE-2026-73570 | 71.7% | 99.4% | 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.