CVE-2024-20502: cisco cisco meraki mx firmware Uncontrolled Resource Consumption
Vulnerability summary
CVE-2024-20502 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in cisco cisco meraki mx firmware. EPSS estimates a 0.52% chance of exploitation in the next 30 days, higher than 42.9% of scored vulnerabilities.
Timeline
- 02-10-2024PublishedVulnerability first disclosed.
- 04-06-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 2 sources · 1 version- CVE.orgCNA5.8MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:LDiffers
EPSS trend
Probability
0.52%
Chance of exploitation in the next 30 days
Percentile
43%
Versus all other CVEs
30-day change
0.00 pp
From 0.52% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Cisco26 products
- cisco meraki mx firmwareN/A
- meraki_mx100_firmware≥ 16.2, < 18.211.2
- meraki_mx105_firmware≥ 16.2, < 18.211.2
- meraki_mx250_firmware≥ 16.2, < 18.211.2
- meraki_mx400_firmware≥ 16.2, < 18.211.2
1 vendor · 26 products
References
1 links- sec.cloudapps.cisco.com/security/…Vendor Advisory