# CVE-2024-20502: Denial of service in Cisco Meraki MX Firmware > Unauthenticated remote attackers can cause a denial of service on Cisco Meraki MX and Z Series devices by exhausting resources during SSL VPN session establishment. - **Severity:** Medium 5.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** No - **Published:** 2 Oct 2024 - **Updated:** 4 Jun 2025 - **Also known as:** GHSA-2r9m-635c-rmwj ## What is CVE-2024-20502? CVE-2024-20502 is a medium-severity denial of service vulnerability in Cisco Meraki MX Firmware, published on 2 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description A vulnerability in the Cisco AnyConnect VPN server of Cisco Meraki MX and Cisco Meraki Z Series Teleworker Gateway devices could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to insufficient resource management while establishing SSL VPN sessions. An attacker could exploit this vulnerability by sending a series of crafted HTTPS requests to the VPN server of an affected device. A successful exploit could allow the attacker to cause the Cisco AnyConnect VPN server to stop accepting new connections, preventing new SSL VPN connections from being established. Existing SSL VPN sessions are not impacted. Note: When the attack traffic stops, the Cisco AnyConnect VPN server recovers gracefully without requiring manual intervention. Weakness: CWE-400 (Uncontrolled Resource Consumption) ## Which versions are affected by CVE-2024-20502? It affects 25 products. Products: Cisco Meraki Mx100 Firmware, Cisco Meraki Mx105 Firmware, Cisco Meraki Mx250 Firmware, Cisco Meraki Mx400 Firmware, Cisco Meraki Mx450 Firmware, Cisco Meraki Mx600 Firmware, Cisco Meraki Mx64 Firmware, Cisco Meraki Mx64w Firmware, Cisco Meraki Mx65 Firmware, Cisco Meraki Mx65w Firmware, Cisco Meraki Mx67 Firmware, Cisco Meraki Mx67c Firmware, Cisco Meraki Mx67w Firmware, Cisco Meraki Mx68 Firmware, Cisco Meraki Mx68cw Firmware, Cisco Meraki Mx68w Firmware, Cisco Meraki Mx75 Firmware, Cisco Meraki Mx84 Firmware, Cisco Meraki Mx85 Firmware, Cisco Meraki Mx95 Firmware and 5 more. ## How do I fix CVE-2024-20502? No fix has been published for CVE-2024-20502 yet. Limit exposure of the affected software until one is available. ## Is CVE-2024-20502 being exploited? There is no known exploitation of CVE-2024-20502 in the wild and no public exploit code. ## Other vulnerabilities in Cisco Meraki MX Firmware - [CVE-2024-20498](https://insights.sbomify.com/CVE-2024-20498/): Denial of service in Cisco Meraki MX Firmware (high 8.6) - [CVE-2024-20499](https://insights.sbomify.com/CVE-2024-20499/): Denial of service in Cisco Meraki MX Firmware (high 8.6) - [CVE-2024-20501](https://insights.sbomify.com/CVE-2024-20501/): Denial of service in Cisco Meraki MX Firmware (high 8.6) - [CVE-2022-20933](https://insights.sbomify.com/CVE-2022-20933/): Cisco Meraki MX and Z3 Teleworker Gateway VPN Denial of Service Vulnerability (high 8.6) - [CVE-2024-20500](https://insights.sbomify.com/CVE-2024-20500/): Denial of service in Cisco Meraki MX Firmware (medium 5.8) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2024-20502 and fix it if it is affected. What it is: CVE-2024-20502 is a medium-severity denial of service vulnerability in Cisco Meraki MX Firmware, published on 2 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: There is no known exploitation of CVE-2024-20502 in the wild and no public exploit code. Affected product: Cisco Meraki MX Firmware. No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2024-20502/ (Markdown: https://insights.sbomify.com/CVE-2024-20502/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2024-20502 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-20502 - OSV: https://osv.dev/vulnerability/CVE-2024-20502 --- From sbomify Insights: https://insights.sbomify.com/CVE-2024-20502/ Summaries are generated and may contain mistakes; the official description above is the record.