Is CVE-2019-1859 in the CISA KEV catalog?

No. CVE-2019-1859 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-1859?

CVE-2019-1859 has a CVSS v3 base score of 7.2 (HIGH).

What is the EPSS score for CVE-2019-1859?

CVE-2019-1859 has an EPSS score of 0.85% (54th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-1859?

Upgrade sf200-24 firmware to 1.4.10.6 or later. Fixes are available for 114 affected products.

CVE & CISA-KEV Catalog

CVE-2019-1859

HIGH

7.2

CVSS v3

NVD

Description

A vulnerability in the Secure Shell (SSH) authentication process of Cisco Small Business Switches software could allow an attacker to bypass client-side certificate authentication and revert to password authentication. The vulnerability exists because OpenSSH mishandles the authentication process. An attacker could exploit this vulnerability by attempting to connect to the device via SSH. A successful exploit could allow the attacker to access the configuration as an administrative user if the default credentials are not changed. There are no workarounds available; however, if client-side certificate authentication is enabled, disable it and use strong password authentication. Client-side certificate authentication is disabled by default.

CWE-285 CWE-295Improper Certificate Validation

How to fix

Remediation Available

sf200-24 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf200-24fp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf200-24p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf200-48 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf200-48p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf250-24 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sf250-24p firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sf250-48 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sf250-48hp firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sf300-08 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf300-24 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf300-24mp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf300-24p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf300-24pp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf300-48 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf300-48p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf300-48pp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf302-08 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf302-08mp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf302-08mpp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf302-08p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf302-08pp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf350-48 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sf350-48mp firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sf350-48p firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sf500-24 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf500-24p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf500-48 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf500-48p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sf550x-24 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sf550x-24mp firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sf550x-24p firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sf550x-48 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sf550x-48mp firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sf550x-48p firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg200-08 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg200-08p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg200-10fp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg200-18 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg200-26 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg200-26fp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg200-26p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg200-50 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg200-50fp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg200-50p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg250-08 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg250-08hp firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg250-10p firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg250-18 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg250-26 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg250-26hp firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg250-26p firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg250-50 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg250-50hp firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg250-50p firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg250x-24 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg250x-24p firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg250x-48 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg250x-48p firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg300-10 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg300-10mp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg300-10mpp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg300-10p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg300-10pp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg300-10sfp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg300-20 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg300-28 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg300-28mp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg300-28p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg300-28pp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg300-52 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg300-52mp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg300-52p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg350-10 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg350-10mp firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg350-10p firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg350-28 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg350-28mp firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg350-28p firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg350x-24 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg350x-24mp firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg350x-24p firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg350x-48 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg350x-48mp firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg350x-48p firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg350xg-24f firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg350xg-24t firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg350xg-2f10 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg350xg-48t firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg355-10p firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg500-28 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg500-28mpp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg500-28p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg500-52 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg500-52mp firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg500-52p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg500x-24 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg500x-24p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg500x-48 firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg500x-48p firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg500xg-8f8t firmwareNVD

Affected:< 1.4.10.6Fixed in:1.4.10.6CVE-2019-1859derived from NVD

sg550x-24 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg550x-24mp firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg550x-24mpp firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg550x-24p firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg550x-48 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg550x-48mp firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sg550x-48p firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sx550x-12f firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sx550x-16ft firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sx550x-24 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sx550x-24f firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sx550x-24ft firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

sx550x-52 firmwareNVD

Affected:< 2.5.0.78Fixed in:2.5.0.78CVE-2019-1859derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.85%probability of exploitation in 30 days

54thpercentile

Moderate risk: more likely to be exploited than 54% of all known CVEs.

References

Vendor Advisory1

tools.cisco.com

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CVE-2025-29927	Critical	9.1	100%	-	Fix
CVE-2021-28799	Critical	10.0	78%	KEV + Ransom	Fix
CVE-2023-32707	High	8.8	74%	-	Fix
CVE-2023-48241	High	7.5	73%	-	Fix
CVE-2023-22480	High	7.3	67%	-	Fix
CVE-2022-3229	Critical	9.8	66%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.