Cisco Systems Inc. Cisco 550X Series Stackable Managed Switches

Name: Cisco Systems Inc. Cisco 550X Series Stackable Managed Switches
Brand: Cisco Systems Inc.

productRU

A product tracked in the threat graph; the vulnerabilities below are known to affect it.

KEV-listed

by severity

10critical4high2medium0low

updated 2026-10-28

vulnerabilities (16)

Related CVEs.

sort

ID	severity	EPSS	exploitable	patched	published	affected
CVE-2018-15439US	critical9.8OT high	49.7% (99th)	Exploit	no fix	2018-11-08	—
CVE-2023-20189US	critical9.8	12.0% (96th)	—	no fix	2023-05-18	≤ 2.5.9.16
CVE-2023-20161US	critical9.8	11.1% (96th)	—	no fix	2023-05-18	≤ 2.5.9.16
CVE-2023-20160US	critical9.8	11.1% (96th)	—	no fix	2023-05-18	≤ 2.5.9.16
CVE-2023-20159US	critical9.8	11.1% (96th)	—	no fix	2023-05-18	≤ 2.5.9.16
CVE-2020-3297US	critical9.8	3.04% (87th)	—	no fix	2020-07-02	≤ 2.5.5.47
CVE-2020-3496US	medium5.3	1.74% (78th)	—	no fix	2020-08-26	≤ 2.5.5.47
CVE-2021-34739US	high8.1	1.67% (77th)	—	no fix	2021-11-04	≤ 2.5.8.12
CVE-2023-20024US	high7.5	1.58% (75th)	—	no fix	2023-05-18	≤ 2.5.9.16
CVE-2023-20162US	critical9.8	1.51% (74th)	—	no fix	2023-05-18	≤ 2.5.9.16
CVE-2023-20158US	critical9.8	1.51% (74th)	—	no fix	2023-05-18	≤ 2.5.9.16
CVE-2023-20157US	critical9.8	1.51% (74th)	—	no fix	2023-05-18	≤ 2.5.9.16
CVE-2023-20156US	critical9.8	1.51% (74th)	—	no fix	2023-05-18	≤ 2.5.9.16
CVE-2020-3121US	medium6.1	1.07% (65th)	—	no fix	2020-01-26	≤ 2.5.0.90
CVE-2019-1859US	high7.2	0.84% (58th)	—	no fix	2019-05-03	≤ 2.5.0.78
CVE-2024-20263US	high7.2	0.45% (39th)	—	no fix	2024-01-26	≤ 2.5.9.54

The flaw types (CWEs) most of these CVEs share.

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')9 CVEs
CWE-20Improper Input Validation2 CVEs
CWE-121Stack-based Buffer Overflow1 CVEs
CWE-122Heap-based Buffer Overflow1 CVEs
CWE-200Exposure of Sensitive Information to an Unauthorized Actor1 CVEs
CWE-284Improper Access Control1 CVEs
CWE-285Improper Authorization1 CVEs
CWE-287Improper Authentication1 CVEs

Which sources assert this record, and when.

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