Vulnerability Snapshot
CVE-2020-3297 is rated CRITICAL — exploitation is trivial or already observed in the wild and impact is severe. Patch immediately, not on the next maintenance window.
Affected technology: sg250x-24_firmware, sg250x-24, sg250x-24p_firmware, sg250x-24p, sg250x-48_firmware, plus 5 other product variants.
Executive Summary
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.
Why It Matters
CVE-2020-3297 is rated CRITICAL severity, requiring immediate attention from security teams.
CVSS Base Score: 9.8/10
Affected Technologies
Vendors: cisco
Products: sg250x-24_firmware, sg250x-24, sg250x-24p_firmware, sg250x-24p, sg250x-48_firmware, sg250x-48, sg250x-48p_firmware, sg250x-48p, sg250-08_firmware, sg250-08, sg250-08hp_firmware, sg250-08hp, sg250-10p_firmware, sg250-10p, sg250-18_firmware, sg250-18, sg250-26_firmware, sg250-26, sg250-26hp_firmware, sg250-26hp, sg250-26p_firmware, sg250-26p, sg250-50_firmware, sg250-50, sg250-50hp_firmware, sg250-50hp, sg250-50p_firmware, sg250-50p, sf250-24_firmware, sf250-24, sf250-24p_firmware, sf250-24p, sf250-48_firmware, sf250-48, sf250-48hp_firmware, sf250-48hp, sg350-10_firmware, sg350-10, sg350-10p_firmware, sg350-10p, sg350-10mp_firmware, sg350-10mp, sg355-10p_firmware, sg355-10p, sg350-28_firmware, sg350-28, sg350-28p_firmware, sg350-28p, sg350-28mp_firmware, sg350-28mp, sf350-48_firmware, sf350-48, sf350-48p_firmware, sf350-48p, sf350-48mp_firmware, sf350-48mp, sg350xg-2f10_firmware, sg350xg-2f10, sg350xg-24f_firmware, sg350xg-24f, sg350xg-24t_firmware, sg350xg-24t, sg350xg-48t_firmware, sg350xg-48t, sg350x-24_firmware, sg350x-24, sg350x-24p_firmware, sg350x-24p, sg350x-24mp_firmware, sg350x-24mp, sg350x-48_firmware, sg350x-48, sg350x-48p_firmware, sg350x-48p, sg350x-48mp_firmware, sg350x-48mp, sx550x-16ft_firmware, sx550x-16ft, sx550x-24ft_firmware, sx550x-24ft, sx550x-12f_firmware, sx550x-12f, sx550x-24f_firmware, sx550x-24f, sx550x-24_firmware, sx550x-24, sx550x-52_firmware, sx550x-52, sg550x-24_firmware, sg550x-24, sg550x-24p_firmware, sg550x-24p, sg550x-24mp_firmware, sg550x-24mp, sg550x-24mpp_firmware, sg550x-24mpp, sg550x-48_firmware, sg550x-48, sg550x-48p_firmware, sg550x-48p, sg550x-48mp_firmware, sg550x-48mp, sf550x-24_firmware, sf550x-24, sf550x-24p_firmware, sf550x-24p, sf550x-24mp_firmware, sf550x-24mp, sf550x-48_firmware, sf550x-48, sf550x-48p_firmware, sf550x-48p, sf550x-48mp_firmware, sf550x-48mp, sf200-24_firmware, sf200-24, sf200-24fp_firmware, sf200-24fp, sf200-24p_firmware, sf200-24p, sf200-48_firmware, sf200-48, sf200-48p_firmware, sf200-48p, sf200e-24_firmware, sf200e-24, sf200e-24p_firmware, sf200e-24p, sf200e-48_firmware, sf200e-48, sf200e-48p_firmware, sf200e-48p, sg200-08_firmware, sg200-08, sg200-08p_firmware, sg200-08p, sg200-10fp_firmware, sg200-10fp, sg200-18_firmware, sg200-18, sg200-26_firmware, sg200-26, sg200-26fp_firmware, sg200-26fp, sg200-26p_firmware, sg200-26p, sg200-50_firmware, sg200-50, sg200-50fp_firmware, sg200-50fp, sg200-50p_firmware, sg200-50p, sf302-08pp_firmware, sf302-08pp, sf302-08mpp_firmware, sf302-08mpp, sg300-10pp_firmware, sg300-10pp, sg300-10mpp_firmware, sg300-10mpp, sf300-24pp_firmware, sf300-24pp, sf300-48pp_firmware, sf300-48pp, sg300-28pp_firmware, sg300-28pp, sf300-08_firmware, sf300-08, sf300-48p_firmware, sf300-48p, sg300-10mp_firmware, sg300-10mp, sg300-10p_firmware, sg300-10p, sg300-10_firmware, sg300-10, sg300-28p_firmware, sg300-28p, sf300-24p_firmware, sf300-24p, sf302-08mp_firmware, sf302-08mp, sg300-28_firmware, sg300-28, sf300-48_firmware, sf300-48, sg300-20_firmware, sg300-20, sf302-08p_firmware, sf302-08p, sg300-52_firmware, sg300-52, sf300-24_firmware, sf300-24, sf302-08_firmware, sf302-08, sf300-24mp_firmware, sf300-24mp, sg300-10sfp_firmware, sg300-10sfp, sg300-28mp_firmware, sg300-28mp, sg300-52p_firmware, sg300-52p, sg300-52mp_firmware, sg300-52mp, sg500-28mpp_firmware, sg500-28mpp, sg500-52mp_firmware, sg500-52mp, sg500xg-8f8t_firmware, sg500xg-8f8t, sf500-24_firmware, sf500-24, sf500-24p_firmware, sf500-24p, sf500-48_firmware, sf500-48, sf500-48p_firmware, sf500-48p, sg500-28_firmware, sg500-28, sg500-28p_firmware, sg500-28p, sg500-52_firmware, sg500-52, sg500-52p_firmware, sg500-52p, sg500x-24_firmware, sg500x-24, sg500x-24p_firmware, sg500x-24p, sg500x-48_firmware, sg500x-48, sg500x-48p_firmware, sg500x-48p
🛡️What Defenders Should Check
Use Vulnios to continuously monitor your exposure to CVE-2020-3297 and similar vulnerabilities.
References & Sources
How Vulnios Detects This
Vulnios scans for this vulnerability using Trivy and Grype for SBOM-based CVE matching and Vulnios CVE feed continuous monitoring against your asset inventory. Run a scan against your environment to see whether you are exposed; findings are linked back to the original CVE record so triage starts with the patch path already known.
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Affected Products
Sources
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Frequently Asked Questions
What is CVE-2020-3297?
CVE-2020-3297 is a critical-severity vulnerability tracked under the Common Vulnerabilities and Exposures program. 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 protection
Am I affected?
Check whether your environment runs sg250x-24_firmware, sg250x-24, sg250x-24p_firmware, sg250x-24p, sg250x-48_firmware. If you operate any of those, treat yourself as in scope until you have evidence otherwise. A Vulnios scan will identify the exact assets carrying the affected version.
How urgent is the response?
Critical: do not wait for your normal patch cycle. Verify exposure today, apply the vendor patch immediately, and add detection rules for any post-exploit indicators.
How do I remediate?
Apply the vendor patch listed in the upstream advisory linked under Sources. If the patch is not yet available, follow the vendor-supplied workaround (often a config flag or feature disable) and add detections for the published exploit pattern in your SIEM. Re-scan after the patch lands to confirm the finding clears.
Where can I track exploitation activity?
Watch CISA's Known Exploited Vulnerabilities catalog for CVE-2020-3297. Cross-reference with public exploit databases and your own SIEM/IDS for indicator-of-compromise patterns. Vulnios tracks KEV status automatically and surfaces it on the asset findings view.
How does Vulnios help with this?
Vulnios continuously cross-references your asset inventory against the live CVE feed (NVD, vendor advisories, CISA KEV, and curated OSINT). When a new CVE matches your environment, you get a prioritized finding with the severity, KEV status, exploit-prediction (EPSS), and a direct path to the vendor patch. You can start a free scan from the homepage.
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