Cisco Small Business Series Switch Web-based User Interface buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.3$25k-$100k0.00

Summaryinfo

A vulnerability was found in Cisco Small Business Series Switch and classified as very critical. Affected by this issue is some unknown functionality of the component Web-based User Interface. The manipulation results in buffer overflow. This vulnerability is identified as CVE-2023-20189. The attack can be executed remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Cisco Small Business Series Switch (the affected version is unknown). Affected is an unknown code of the component Web-based User Interface. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Multiple vulnerabilities in the web-based user interface of certain Cisco Small Business Series Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition or execute arbitrary code with root privileges on an affected device. These vulnerabilities are due to improper validation of requests that are sent to the web interface. For more information about these vulnerabilities, see the Details section of this advisory.

The weakness was released 05/18/2023 as cisco-sa-sg-web-multi-S9g4Nkgv. The advisory is shared for download at sec.cloudapps.cisco.com. This vulnerability is traded as CVE-2023-20189 since 10/27/2022. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $25k-$100k (estimation calculated on 08/25/2025).

As 0-day the estimated underground price was around $25k-$100k.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-24368). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.4
VulDB Meta Temp Score: 9.3

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

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

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/27/2022 🔍
05/18/2023 +203 days 🔍
05/18/2023 +0 days 🔍
08/25/2025 +830 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-sg-web-multi-S9g4Nkgv
Status: Confirmed

CVE: CVE-2023-20189 (🔍)
GCVE (CVE): GCVE-0-2023-20189
GCVE (VulDB): GCVE-100-229296
EUVD: 🔍

Entryinfo

Created: 05/18/2023 09:04
Updated: 08/25/2025 19:24
Changes: 05/18/2023 09:04 (49), 06/10/2023 13:40 (11), 08/25/2025 19:24 (16)
Complete: 🔍
Cache ID: 216::103

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

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