CVE-2020-3297
Cisco Small Business Smart and Managed Switches Session Management Vulnerability
A vulnerability in session management for the web-based interface of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to defeat authentication protections and gain unauthorized access to the management interface. The attacker could obtain the privileges of the highjacked session account, which could include administrator privileges on the device. The vulnerability is due to the use of weak entropy generation for session identifier values. An attacker could exploit this vulnerability to determine a current session identifier through brute force and reuse that session identifier to take over an ongoing session. In this way, an attacker could take actions within the management interface with privileges up to the level of the administrative user.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
8.1
Cisco Small Business Smart and Managed Switches Session Management Vulnerability
A vulnerability in session management for the web-based interface of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to defeat authentication protections and gain unauthorized access to the management interface. The attacker could obtain the privileges of the highjacked session account, which could include administrator privileges on the device. The vulnerability is due to the use of weak entropy generation for session identifier values. An attacker could exploit this vulnerability to determine a current session identifier through brute force and reuse that session identifier to take over an ongoing session. In this way, an attacker could take actions within the management interface with privileges up to the level of the administrative user.
- Record
CVE-2020-3297- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
EUVDEUVD-2020-24568
8.1
A vulnerability in session management for the web-based interface of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to defeat authentication protections and gain unauthorized access to the management interface. The attacker could obtain the privileges of the highjacked session account, which could include administrator privileges on the device. The vulnerability is due to the use of weak entropy generation for session identifier values. An attacker could exploit this vulnerability to determine a current session identifier through brute force and reuse that session identifier to take over an ongoing session. In this way, an attacker could take actions within the management interface with privileges up to the level of the administrative user.
- Record
EUVD-2020-24568- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6c5p-w2ph-4fw7 No score
A vulnerability in session management for the web-based interface of Cisco Small Business Smart...
A vulnerability in session management for the web-based interface of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to defeat authentication protections and gain unauthorized access to the management interface. The attacker could obtain the privileges of the highjacked session account, which could include administrator privileges on the device. The vulnerability is due to the use of weak entropy generation for session identifier values. An attacker could exploit this vulnerability to determine a current session identifier through brute force and reuse that session identifier to take over an ongoing session. In this way, an attacker could take actions within the management interface with privileges up to the level of the administrative user.
- Record
GHSA-6c5p-w2ph-4fw7- Updated
- 2026-11-02
NVD
9.8
A vulnerability in session management for the web-based interface of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to defeat authentication protections and gain unauthorized access to the management interface. The attacker could obtain the privileges of the highjacked session account, which could include administrator privileges on the device. The vulnerability is due to the use of weak entropy generation for session identifier values. An attacker could exploit this vulnerability to determine a current session identifier through brute force and reuse that session identifier to take over an ongoing session. In this way, an attacker could take actions within the management interface with privileges up to the level of the administrative user.
- Record
CVE-2020-3297- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-287
- Updated
- 2026-11-02
Affected products
- cisco small business 200 series smart switches
- cisco sf200-24 firmware
- cisco sf200-24fp firmware
- cisco sf200-24p firmware
- cisco sf200-48 firmware
- cisco sf200-48p firmware
- cisco sf200e-24 firmware
- cisco sf200e-24p firmware
- cisco sf200e-48 firmware
- cisco sf200e-48p firmware
- cisco sf250-24 firmware
- cisco sf250-24p firmware
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- cisco sf250-48 firmware
- cisco sf250-48hp firmware
- cisco sf300-08 firmware
- cisco sf300-24 firmware
- cisco sf300-24mp firmware
- cisco sf300-24p firmware
- cisco sf300-24pp firmware
- cisco sf300-48 firmware
- cisco sf300-48p firmware
- cisco sf300-48pp firmware
- cisco sf302-08 firmware
- cisco sf302-08mp firmware
- cisco sf302-08mpp firmware
- cisco sf302-08p firmware
- cisco sf302-08pp firmware
- cisco sf350-48 firmware
- cisco sf350-48mp firmware
- cisco sf350-48p firmware
- cisco sf500-24 firmware
- cisco sf500-24p firmware
- cisco sf500-48 firmware
- cisco sf500-48p firmware
- cisco sf550x-24 firmware
- cisco sf550x-24mp firmware
- cisco sf550x-24p firmware
- cisco sf550x-48 firmware
- cisco sf550x-48mp firmware
- cisco sf550x-48p firmware
- cisco sg200-08 firmware
- cisco sg200-08p firmware
- cisco sg200-10fp firmware
- cisco sg200-18 firmware
- cisco sg200-26 firmware
- cisco sg200-26fp firmware
- cisco sg200-26p firmware
- cisco sg200-50 firmware
- cisco sg200-50fp firmware
- cisco sg200-50p firmware
- cisco sg250-08 firmware
- cisco sg250-08hp firmware
- cisco sg250-10p firmware
- cisco sg250-18 firmware
- cisco sg250-26 firmware
- cisco sg250-26hp firmware
- cisco sg250-26p firmware
- cisco sg250-50 firmware
- cisco sg250-50hp firmware
- cisco sg250-50p firmware
- cisco sg250x-24 firmware
- cisco sg250x-24p firmware
- cisco sg250x-48 firmware
- cisco sg250x-48p firmware
- cisco sg300-10 firmware
- cisco sg300-10mp firmware
- cisco sg300-10mpp firmware
- cisco sg300-10p firmware
- cisco sg300-10pp firmware
- cisco sg300-10sfp firmware
- cisco sg300-20 firmware
- cisco sg300-28 firmware
- cisco sg300-28mp firmware
- cisco sg300-28p firmware
- cisco sg300-28pp firmware
- cisco sg300-52 firmware
- cisco sg300-52mp firmware
- cisco sg300-52p firmware
- cisco sg350-10 firmware
- cisco sg350-10mp firmware
- cisco sg350-10p firmware
- cisco sg350-28 firmware
- cisco sg350-28mp firmware
- cisco sg350-28p firmware
- cisco sg350x-24 firmware
- cisco sg350x-24mp firmware
- cisco sg350x-24p firmware
- cisco sg350x-48 firmware
- cisco sg350x-48mp firmware
- cisco sg350x-48p firmware
- cisco sg350xg-24f firmware
- cisco sg350xg-24t firmware
- cisco sg350xg-2f10 firmware
- cisco sg350xg-48t firmware
- cisco sg355-10p firmware
- cisco sg500-28 firmware
- cisco sg500-28mpp firmware
- cisco sg500-28p firmware
- cisco sg500-52 firmware
- cisco sg500-52mp firmware
- cisco sg500-52p firmware
- cisco sg500x-24 firmware
- cisco sg500x-24p firmware
- cisco sg500x-48 firmware
- cisco sg500x-48p firmware
- cisco sg500xg-8f8t firmware
- cisco sg550x-24 firmware
- cisco sg550x-24mp firmware
- cisco sg550x-24mpp firmware
- cisco sg550x-24p firmware
- cisco sg550x-48 firmware
- cisco sg550x-48mp firmware
- cisco sg550x-48p firmware
- cisco sx550x-12f firmware
- cisco sx550x-16ft firmware
- cisco sx550x-24 firmware
- cisco sx550x-24f firmware
- cisco sx550x-24ft firmware
- cisco sx550x-52 firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-3297 is a high vulnerability (CVSS 8.1) in Cisco Small Business 200 Series Smart Switches, published July 2, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.04%, the 87th percentile. No source names a fixed version.