CVE-2024-20502 json
A vulnerability in the Cisco AnyConnect VPN server of Cisco Meraki MX and Cisco Meraki Z Series Teleworker Gateway devices could allow an u…
published 2024-10-02 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-18217
- cvss
- 5.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- cisco meraki_mx65_firmware 18.211.2
- cisco meraki_mx64_firmware 18.211.2
- cisco meraki_z4c_firmware 18.211.2
- cisco meraki_z4_firmware 18.211.2
- cisco meraki_z3c_firmware 18.211.2
- cisco meraki_z3_firmware 18.211.2
- cisco meraki_vmx_firmware 18.211.2
- cisco meraki_mx600_firmware 18.211.2
- cisco meraki_mx450_firmware 18.211.2
- cisco meraki_mx400_firmware 18.211.2
- cisco meraki_mx250_firmware 18.211.2
- cisco meraki_mx105_firmware 18.211.2
- cisco meraki_mx100_firmware 18.211.2
- cisco meraki_mx95_firmware 18.211.2
- cisco meraki_mx85_firmware 18.211.2
- cisco meraki_mx84_firmware 18.211.2
- cisco meraki_mx75_firmware 18.211.2
- cisco meraki_mx68w_firmware 18.211.2
- cisco meraki_mx68cw_firmware 18.211.2
- cisco meraki_mx68_firmware 18.211.2
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- Cisco Cisco Meraki MX Firmware
- cisco meraki_mx
- cisco meraki_z1
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
Sources
- CVE List CVE-2024-20502
- NVD CVE-2024-20502
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