Cisco Webex Meetings vulnerabilities: known CVEs & security history
Cisco · Communication · 69 tracked CVEs · 0 actively exploited · updated June 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Cisco Webex Meetings release lines — 69 in total. A CVE here doesn't mean your version is affected — check Cisco Webex Meetings's current status and the safe version to run.
Known Cisco Webex Meetings CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2018-0264 | critical | 9.6 | 3% | 2018 |
| CVE-2018-0104 | critical | 9.6 | 4% | 2018 |
| CVE-2017-12372 | critical | 9.6 | 3% | 2017 |
| CVE-2017-12371 | critical | 9.6 | 3% | 2017 |
| CVE-2017-12370 | critical | 9.6 | 3% | 2017 |
| CVE-2017-12369 | critical | 9.6 | 3% | 2017 |
| CVE-2017-12368 | critical | 9.6 | 3% | 2017 |
| CVE-2018-0112 | critical | 9 | 3% | 2018 |
| CVE-2020-3342 | high | 8.8 | 4% | 2020 |
| CVE-2017-6753 | high | 8.8 | 6% | 2017 |
| CVE-2020-3361 | high | 8.1 | 2% | 2020 |
| CVE-2020-3604 | high | 7.8 | 2% | 2020 |
| CVE-2020-3603 | high | 7.8 | 3% | 2020 |
| CVE-2020-3573 | high | 7.8 | 3% | 2020 |
| CVE-2019-15287 | high | 7.8 | 2% | 2020 |
| CVE-2019-15285 | high | 7.8 | 2% | 2020 |
| CVE-2019-15283 | high | 7.8 | 2% | 2020 |
| CVE-2020-3194 | high | 7.8 | 2% | 2020 |
| CVE-2020-3128 | high | 7.8 | 2% | 2020 |
| CVE-2020-3127 | high | 7.8 | 2% | 2020 |
| CVE-2019-1674 | high | 7.8 | 11% | 2019 |
| CVE-2018-0103 | high | 7.8 | 2% | 2018 |
| CVE-2020-3263 | high | 7.5 | 4% | 2020 |
| CVE-2020-3155 | high | 7.4 | 1% | 2020 |
| CVE-2020-3588 | high | 7.3 | 0% | 2020 |
| CVE-2020-3440 | medium | 6.5 | 3% | 2020 |
| CVE-2026-20233 | medium | 6.1 | 0% | 2026 |
| CVE-2025-20250 | medium | 6.1 | 0% | 2025 |
| CVE-2025-20247 | medium | 6.1 | 0% | 2025 |
| CVE-2025-20246 | medium | 6.1 | 0% | 2025 |
| CVE-2022-20654 | medium | 6.1 | 1% | 2024 |
| CVE-2022-20778 | medium | 6.1 | 1% | 2022 |
| CVE-2021-1351 | medium | 6.1 | 1% | 2021 |
| CVE-2020-27126 | medium | 6.1 | 1% | 2020 |
| CVE-2018-0390 | medium | 6.1 | 1% | 2018 |
| CVE-2018-0357 | medium | 6.1 | 2% | 2018 |
| CVE-2018-0356 | medium | 6.1 | 2% | 2018 |
| CVE-2019-1948 | medium | 5.9 | 1% | 2019 |
| CVE-2017-17428 | medium | 5.9 | 15% | 2018 |
| CVE-2021-1544 | medium | 5.5 | 0% | 2021 |
| CVE-2021-1372 | medium | 5.5 | 0% | 2021 |
| CVE-2020-3347 | medium | 5.5 | 0% | 2020 |
| CVE-2025-20328 | medium | 5.4 | 0% | 2025 |
| CVE-2023-20133 | medium | 5.4 | 1% | 2023 |
| CVE-2023-20134 | medium | 5.4 | 0% | 2023 |
| CVE-2023-20132 | medium | 5.4 | 0% | 2023 |
| CVE-2022-20852 | medium | 5.4 | 0% | 2022 |
| CVE-2022-20820 | medium | 5.4 | 0% | 2022 |
| CVE-2021-1311 | medium | 5.4 | 1% | 2021 |
| CVE-2019-15960 | medium | 5.4 | 1% | 2019 |
| CVE-2021-40128 | medium | 5.3 | 1% | 2021 |
| CVE-2020-3441 | medium | 5.3 | 2% | 2020 |
| CVE-2019-16001 | medium | 5.3 | 0% | 2019 |
| CVE-2021-1420 | medium | 4.7 | 1% | 2021 |
| CVE-2021-1310 | medium | 4.7 | 2% | 2021 |
| CVE-2019-1677 | medium | 4.6 | 0% | 2019 |
| CVE-2020-3541 | medium | 4.4 | 0% | 2020 |
| CVE-2025-20291 | medium | 4.3 | 0% | 2025 |
| CVE-2025-20255 | medium | 4.3 | 0% | 2025 |
| CVE-2021-1410 | medium | 4.3 | 1% | 2024 |
| CVE-2023-20180 | medium | 4.3 | 0% | 2023 |
| CVE-2021-34743 | medium | 4.3 | 0% | 2021 |
| CVE-2021-1467 | medium | 4.3 | 1% | 2021 |
| CVE-2020-3345 | medium | 4.3 | 1% | 2020 |
| CVE-2020-3182 | medium | 4.3 | 1% | 2020 |
| CVE-2015-6384 | medium | 4.3 | 2% | 2015 |
| CVE-2021-1221 | medium | 4.1 | 1% | 2021 |
| CVE-2020-3502 | medium | 4.1 | 1% | 2020 |
| CVE-2020-3501 | medium | 4.1 | 1% | 2020 |
Is my Cisco Webex Meetings version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your Cisco Webex Meetings version → · Monitor Cisco Webex Meetings for new CVEs →
Cisco Webex Meetings vulnerabilities — frequently asked
How many known vulnerabilities does Cisco Webex Meetings have?
IsItPatched tracks 69 CVEs for Cisco Webex Meetings. 8 are critical-severity and 17 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Cisco Webex Meetings have any actively-exploited vulnerabilities?
None of Cisco Webex Meetings's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe Cisco Webex Meetings vulnerability?
Among tracked issues, CVE-2018-0264 (CRITICAL, CVSS 9.6) ranks highest — a Improper input validation weakness.
Is Cisco Webex Meetings safe to use?
It depends on the version. The latest supported Cisco Webex Meetings release clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: Cisco Webex Meetings security status · Cisco Webex Meetings end-of-life · actively-exploited CVEs. Always verify against Cisco's advisories — see our disclaimer.