VDB-211784 · CVE-2022-20933 · Nessus 241195

Cisco Meraki MX/Meraki Z3 AnyConnect VPN Server denial of service

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.1	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Cisco Meraki MX and Meraki Z3. It has been declared as problematic. Affected by this issue is some unknown functionality of the component AnyConnect VPN Server. Such manipulation leads to denial of service. This vulnerability is traded as CVE-2022-20933. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco Meraki MX and Meraki Z3 (version now known) and classified as critical. Affected by this issue is some unknown processing of the component AnyConnect VPN Server. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability.

The weakness was shared 10/19/2022 as cisco-sa-meraki-mx-vpn-dos-vnESbgBf. The advisory is shared for download at tools.cisco.com. This vulnerability is handled as CVE-2022-20933 since 11/02/2021. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 241195 (Cisco Meraki 16.2 < 16.16.6 / 17.x < 17.10.1 DoS (cisco-sa-meraki-mx-vpn-dos-vnESbgBf)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (241195). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Cisco

Name

License

commercial

Website

Vendor: https://www.cisco.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 8.1

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.6
NVD Vector: 🔍

CNA Base Score: 8.6
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 241195
Nessus Name: Cisco Meraki 16.2 < 16.16.6 / 17.x < 17.10.1 DoS (cisco-sa-meraki-mx-vpn-dos-vnESbgBf)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/02/2021 🔍
10/19/2022 +350 days 🔍
10/19/2022 +0 days 🔍
07/03/2025 +987 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-meraki-mx-vpn-dos-vnESbgBf
Status: Confirmed

CVE: CVE-2022-20933 (🔍)
GCVE (CVE): GCVE-0-2022-20933
GCVE (VulDB): GCVE-100-211784

Entryinfo

Created: 10/19/2022 20:29
Updated: 07/03/2025 01:25
Changes: 10/19/2022 20:29 (38), 11/18/2022 09:09 (1), 11/18/2022 09:13 (21), 07/03/2025 01:25 (16)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.