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
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.
9.3$25k-$100k0.00

Summaryinfo

A vulnerability, which was classified as very critical, has been found in Cisco Small Business Series Switch. This impacts an unknown function of the component Web-based User Interface. Performing a manipulation results in buffer overflow. This vulnerability was named CVE-2023-20160. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical has been found in Cisco Small Business Series Switch (affected version unknown). This affects an unknown functionality 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. The summary by CVE is:

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 presented 05/18/2023 as cisco-sa-sg-web-multi-S9g4Nkgv. The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is uniquely identified as CVE-2023-20160 since 10/27/2022. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $25k-$100k at the moment (estimation calculated on 08/25/2025).

We expect the 0-day to have been worth approximately $25k-$100k.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-24339). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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-2023-20160 (🔍)
GCVE (CVE): GCVE-0-2023-20160
GCVE (VulDB): GCVE-100-229293
EUVD: 🔍

Entryinfo

Created: 05/18/2023 09:01
Updated: 08/25/2025 14:31
Changes: 05/18/2023 09:01 (37), 05/18/2023 09:03 (14), 06/10/2023 13:23 (11), 08/25/2025 14:31 (16)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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