Technology · Cisco
Cisco Meraki MX Security Appliances vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 9 vulnerabilities in Cisco Meraki MX Security Appliances: 0 in the last 7 days and 8 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-76489, was published on 21 October 2026. 8 vulnerabilities in the last four weeks, up from none in the four before. 1 critical against 0.
- Last 7 days
- 0
- Last 90 days
- 8
- Critical, all time
- 1
- Exploited in the wild
- 0
About Cisco Meraki MX Security Appliances
Cisco cloud-managed security appliances providing network firewall and threat protection.
Latest Cisco Meraki MX Security Appliances vulnerabilities
- CVE-2026-76489: Cisco Snort 3 memory management denial of servicemediumCVSS 5.8
- CVE-2026-20356: Cisco Snort 3 uncontrolled resource consumptionhighCVSS 7.5
- CVE-2026-20291: Cisco Snort 3 improper privilege managementhighCVSS 7.8
- CVE-2026-20236: Cisco Snort 3 incorrect calculation vulnerabilityhighCVSS 7.5
- CVE-2026-20221: Cisco multiple products Snort 3 GRE tunnel denial of servicemediumCVSS 5.8
- CVE-2026-20179: Cisco Snort 3 GRE detection engine denial of servicemediumCVSS 5.8
- CVE-2026-20043: Cisco Snort 3 out-of-bounds writecriticalCVSS 9
- CVE-2026-20011: Cisco multiple products SMTP MIME parsing denial of service in Snort 3mediumCVSS 5.8
- CVE-2026-20068: Cisco Snort 3 detection engine denial of servicemediumCVSS 5.8EPSS 0.4%
Most severe Cisco Meraki MX Security Appliances vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-20043: Cisco Snort 3 out-of-bounds writecriticalCVSS 9
- CVE-2026-20291: Cisco Snort 3 improper privilege managementhighCVSS 7.8
- CVE-2026-20356: Cisco Snort 3 uncontrolled resource consumptionhighCVSS 7.5
- CVE-2026-20236: Cisco Snort 3 incorrect calculation vulnerabilityhighCVSS 7.5
- CVE-2026-20068: Cisco Snort 3 detection engine denial of servicemediumCVSS 5.8EPSS 0.4%
- CVE-2026-76489: Cisco Snort 3 memory management denial of servicemediumCVSS 5.8
- CVE-2026-20221: Cisco multiple products Snort 3 GRE tunnel denial of servicemediumCVSS 5.8
- CVE-2026-20179: Cisco Snort 3 GRE detection engine denial of servicemediumCVSS 5.8
- CVE-2026-20011: Cisco multiple products SMTP MIME parsing denial of service in Snort 3mediumCVSS 5.8
Vulnerabilities per week
8 vulnerabilities in the last four weeks, up from none in the four before. 1 critical against 0. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 8 | 1 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
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A live badge for a README, a status page or an internal wiki: how many Cisco Meraki MX Security Appliances vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/meraki-mx-security-appliances)<a href="https://junglewise.ai/threats/technologies/meraki-mx-security-appliances"><img src="https://junglewise.ai/threats/technologies/meraki-mx-security-appliances/badge.svg" alt="Cisco Meraki MX Security Appliances vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/meraki-mx-security-appliances.json, and this page as text at https://junglewise.ai/threats/technologies/meraki-mx-security-appliances.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Cisco Meraki MX Security Appliances vulnerabilities", https://junglewise.ai/threats/technologies/meraki-mx-security-appliances, 11 November 2026.