CVE-2019-1806

mediumpriority · track · 32EPSS 0.020 · 81 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.05% (81st) EPSS

CVSS 6.8 · medium

Is it mine?

115 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisco_csaf

EPSS · scored 2026-10-27

A vulnerability in the Simple Network Management Protocol (SNMP) input packet processor of Cisco Small Business Sx200, Sx300, Sx500, ESW2 Series Managed Switches and Small Business Sx250, Sx350, Sx550 Series Switches could allow an authenticated, remote attacker to cause the SNMP application of an affected device to cease processing traffic, resulting in the CPU utilization reaching one hundred percent. Manual intervention may be required before a device resumes normal operations. The vulnerability is due to improper validation of SNMP protocol data units (PDUs) in SNMP packets. An attacker could exploit this vulnerability by sending a malicious SNMP packet to an affected device. A successful exploit could allow the attacker to cause the device to cease forwarding traffic, which could result in a denial of service (DoS) condition. Cisco has released firmware updates that address this vulnerability.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedCisco 550X Series Stackable Managed Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

Technical severity, 0–10. One row per scoring source.

7.7

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–7.7

v2.06.8mediumAV:N/AC:L/Au:S/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 8 · impact 6.9

v3.17.7highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.1 · impact 4

v3.07.7highCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · ENISA EU

v3.07.7highCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · psirt@cisco.com USexploitability 3.1 · impact 4

v3.07.7highCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · Cisco PSIRT US

v3.17.7highAV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-770USprimaryCWE-20USCWE-20US

affected products (115)

Products and version ranges known to be affected.

Cisco Cisco 550X Series Stackable Managed Switchesall versionscisco_csafUS
Cisco Cisco 550X Series Stackable Managed Switchesunspecified → 1.4.10.6enisa_euvdEU
Cisco Cisco 550X Series Stackable Managed Switchesunspecified → 2.5.0.78enisa_euvdEU
Cisco Systems Inc. Small Business ESW2≤ 1.4.10.6fstec_bduRU
Cisco Systems Inc. Small Business Sx200≤ 1.4.10.6fstec_bduRU
Cisco Systems Inc. Small Business Sx250≤ 2.5.0.78fstec_bduRU
Cisco Systems Inc. Small Business Sx300≤ 1.4.10.6fstec_bduRU
Cisco Systems Inc. Small Business Sx350≤ 2.5.0.78fstec_bduRU
Cisco Systems Inc. Small Business Sx500≤ 1.4.10.6fstec_bduRU
Cisco Systems Inc. Small Business Sx550≤ 2.5.0.78fstec_bduRU
cisco esw2-350g52dc firmware< 1.4.10.6nvdUScpe:2.3:o:cisco:esw2-350g52dc_firmware:*:*:*:*:*:*:*:*
cisco esw2-550x48dc firmware< 1.4.10.6nvdUScpe:2.3:o:cisco:esw2-550x48dc_firmware:*:*:*:*:*:*:*:*
cisco sf200-24 firmware< 1.4.10.6nvdUScpe:2.3:o:cisco:sf200-24_firmware:*:*:*:*:*:*:*:*
cisco sf200-24p firmware< 1.4.10.6nvdUScpe:2.3:o:cisco:sf200-24p_firmware:*:*:*:*:*:*:*:*
cisco sf200-48 firmware< 1.4.10.6nvdUScpe:2.3:o:cisco:sf200-48_firmware:*:*:*:*:*:*:*:*
cisco sf200-48p firmware< 1.4.10.6nvdUScpe:2.3:o:cisco:sf200-48p_firmware:*:*:*:*:*:*:*:*
cisco sf250-24 firmware< 2.5.0.78nvdUScpe:2.3:o:cisco:sf250-24_firmware:*:*:*:*:*:*:*:*
cisco sf250-24p firmware< 2.5.0.78nvdUScpe:2.3:o:cisco:sf250-24p_firmware:*:*:*:*:*:*:*:*
cisco sf250-48 firmware< 2.5.0.78nvdUScpe:2.3:o:cisco:sf250-48_firmware:*:*:*:*:*:*:*:*
cisco sf250-48hp firmware< 2.5.0.78nvdUScpe:2.3:o:cisco:sf250-48hp_firmware:*:*:*:*:*:*:*:*

showing 20 of 115

advisories (1)

Vendor and ecosystem advisories describing this.

cisco-sa-20190515-sb-snmpdosCisco Small Business Series Switches Simple Network Management Protocol Denial of Service Vulnerability2019-05-15csaf · cisco_csafUS
A vulnerability in the Simple Network Management Protocol (SNMP) input packet processor of Cisco Small Business Sx200, Sx300, Sx500, ESW2 Series Managed Switches and Small Business Sx250, Sx350, Sx550 Series Switches could allow an authenticated, remote attacker to cause the SNMP application of an affected device to cease processing traffic, resulting in the CPU utilization reaching one hundred percent. Manual intervention may be required before a device resumes normal operations. The vulnerability is due to improper validation of SNMP protocol data units (PDUs) in SNMP packets. An attacker could exploit this vulnerability by sending a malicious SNMP packet to an affected device. A successful exploit could allow the attacker to cause the device to cease forwarding traffic, which could result in a denial of service (DoS) condition. Cisco has released firmware updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-sb-snmpdos ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-sb-snmpdos"]

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisco_csaf nvd NVD CVE.org MITRE

published 2019-05-15modified 2026-06-17

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references (9)

External citations — patches, advisories, analysis.

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