A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition.

This vulnerability is due to improper error handling when parsing SNMP requests. This vulnerability affects all versions of SNMP — Versions 1, 2c, and 3. An attacker could exploit this vulnerability by sending a malformed SNMP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly. The attacker must have the SNMPv1 or v2c read-only or read-write community string or valid SNMPv3 user credentials on the affected device.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Cisco Cisco IOS XE Software unknown
Version Status Constraints
17.2.1a affected —
3.18.7SP affected —
16.12.1y affected —
16.12.3s affected —
16.7.1b affected —
16.6.2 affected —
16.6.5 affected —
16.12.1w affected —
3.18.4S affected —
16.9.1d affected —
17.3.1 affected —
16.9.4c affected —
16.7.1 affected —
17.2.1 affected —
16.6.8 affected —
16.9.1b affected —
3.16.8S affected —
16.9.2s affected —
16.12.4 affected —
16.12.3a affected —
17.1.1s affected —
16.11.1a affected —
16.7.2 affected —
16.11.1b affected —
16.9.1s affected —
16.9.3h affected —
16.9.1c affected —
16.6.5a affected —
16.6.3 affected —
16.10.1f affected —
17.2.1v affected —
16.8.1e affected —
16.9.3a affected —
16.12.1a affected —
16.12.1x affected —
3.16.10aS affected —
16.6.4s affected —
16.10.1c affected —
16.12.3 affected —
16.11.2 affected —
16.6.5b affected —
16.12.2s affected —
16.10.1b affected —
16.7.3 affected —
16.6.7 affected —
16.9.6 affected —
16.9.2 affected —
3.16.10S affected —
16.10.1 affected —
16.12.1t affected —
3.18.3bSP affected —
3.13.9S affected —
3.18.3aSP affected —
3.18.5SP affected —
16.9.1 affected —
16.8.1a affected —
3.18.8aSP affected —
16.9.3s affected —
16.6.7a affected —
16.12.2 affected —
16.11.1 affected —
16.9.3 affected —
16.11.1s affected —
16.12.1 affected —
3.16.9S affected —
17.1.1 affected —
17.1.2 affected —
16.10.1d affected —
17.1.1t affected —
16.9.4 affected —
16.8.3 affected —
16.12.2t affected —
16.9.5 affected —
3.16.7S affected —
16.8.1s affected —
16.10.1e affected —
16.8.2 affected —
16.6.4 affected —
16.8.1b affected —
16.10.1a affected —
16.12.1z affected —
16.8.1c affected —
16.9.1a affected —
3.16.7aS affected —
16.9.5f affected —
16.6.4a affected —
16.10.1g affected —
3.13.10S affected —
16.8.1 affected —
16.6.6 affected —
16.9.2a affected —
16.8.1d affected —
16.10.3 affected —
3.18.4SP affected —
3.18.6SP affected —
3.18.3SP affected —
16.7.1a affected —
16.11.1c affected —
16.10.1s affected —
17.2.1r affected —
3.16.7bS affected —
17.1.1a affected —
16.10.2 affected —
16.12.2a affected —
3.16.6bS affected —
16.12.1c affected —
16.12.1s affected —
16.7.4 affected —
3.18.9SP affected —
17.2.2 affected —
16.9.8 affected —
16.9.7 affected —
17.1.3 affected —
17.3.1a affected —
17.3.2a affected —
16.12.5 affected —
17.3.1w affected —
17.3.2 affected —
17.4.1 affected —
16.12.4a affected —
17.4.1a affected —
3.16.10bS affected —
17.3.1x affected —
17.3.3 affected —
16.6.9 affected —
17.2.3 affected —
17.5.1 affected —
16.12.1z1 affected —
16.12.5a affected —
17.4.1b affected —
17.3.1z affected —
16.12.5b affected —
17.4.2 affected —
17.3.3a affected —
17.3.5 affected —
17.3.4 affected —
17.5.1a affected —
16.12.6 affected —
17.6.1 affected —
16.12.1z2 affected —
16.6.10 affected —
17.3.4a affected —
17.6.1a affected —
17.7.1 affected —
17.6.1x affected —
17.6.2 affected —
16.12.6a affected —
17.3.4c affected —
17.4.2a affected —
17.3.4b affected —
17.7.1a affected —
16.12.7 affected —
17.8.1a affected —
17.6.3a affected —
17.6.3 affected —
17.7.2 affected —
17.7.1b affected —
17.9.1w affected —
17.3.5a affected —
17.6.1z affected —
16.12.8 affected —
17.8.1 affected —
17.9.1 affected —
17.6.4 affected —
17.3.5b affected —
17.9.1a affected —
17.3.6 affected —
17.10.1 affected —
16.9.8a affected —
17.6.1z1 affected —
17.10.1a affected —
17.9.2 affected —
17.6.5 affected —
17.9.1x affected —
17.9.1y affected —
16.9.8b affected —
17.3.7 affected —
17.9.2a affected —
17.9.3 affected —
16.12.9 affected —
17.11.1 affected —
17.10.1b affected —
17.6.6 affected —
17.9.1x1 affected —
17.11.1a affected —
17.9.3a affected —
17.12.1 affected —
17.3.8 affected —
17.9.4 affected —
16.12.10 affected —
17.12.1w affected —
17.9.1y1 affected —
17.12.1a affected —
17.9.5 affected —
17.13.1 affected —
17.12.1x affected —
17.12.2 affected —
17.14.1 affected —
17.9.4a affected —
17.3.8a affected —
17.6.6a affected —
17.6.5a affected —
17.6.7 affected —
16.12.10a affected —
17.15.1 affected —
17.13.1a affected —
17.12.2a affected —
16.12.11 affected —
17.12.3 affected —
17.12.1y affected —
17.12.1z affected —
17.9.5a affected —
17.14.1a affected —
17.9.5b affected —
17.6.8 affected —
16.12.12 affected —
17.12.4 affected —
17.9.6 affected —
17.17.1 affected —
17.16.1 affected —
17.15.1w affected —
17.12.3a affected —
17.9.5c affected —
17.15.1a affected —
17.12.1z1 affected —
17.15.2 affected —
17.15.1b affected —
17.9.5d affected —
17.15.1x affected —
17.9.6a affected —
17.12.1z2 affected —
17.6.8a affected —
17.16.1a affected —
16.12.13 affected —
17.15.3 affected —
17.9.7 affected —
17.12.5 affected —
17.15.1y affected —
17.9.5e affected —
17.12.4a affected —
17.15.2a affected —
17.15.2c affected —
17.15.2b affected —
17.12.1z3 affected —
17.9.5f affected —
17.12.4b affected —
17.12.5a affected —
17.18.1 affected —
17.12.6 affected —
17.12.1z4 affected —
17.9.8 affected —
17.9.7a affected —
17.15.3a affected —
17.15.4 affected —
17.12.5b affected —
17.15.3b affected —
16.12.14 affected —
17.9.7b affected —
17.12.5c affected —
17.18.1a affected —
17.15.4a affected —
17.18.2 affected —
17.18.1w affected —
17.15.4b affected —
17.12.6a affected —
17.15.4c affected —
17.9.9 affected —
17.12.5d affected —
16.12.15 affected —
17.15.4s1 affected —
17.12.1z5 affected —
17.18.1x affected —
17.12.1z6 affected —
17.15.4d affected —
17.12.6b affected —
17.4.1c affected —
17.18.1y affected —

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-snmp-dos-ZAqNm4MD cve-icon
History

Wed, 05 Aug 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 05 Aug 2026 17:00:00 +0000

Type Values Removed Values Added
Description A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to improper error handling when parsing SNMP requests. This vulnerability affects all versions of SNMP — Versions 1, 2c, and 3. An attacker could exploit this vulnerability by sending a malformed SNMP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly. The attacker must have the SNMPv1 or v2c read-only or read-write community string or valid SNMPv3 user credentials on the affected device.
Title Cisco IOS XE Software SNMP Denial of Service Vulnerability
Weaknesses CWE-772
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H'}

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-08-05T17:20:47.421Z

Reserved: 2025-10-08T11:59:15.378Z

Link: CVE-2026-20124

cve-icon Vulnrichment

Updated: 2026-08-05T17:20:43.437Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-05T19:00:05Z

Weaknesses