CVE detail
CVE-2026-20124
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.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 13.9 · diversity 10.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 3
- within the 30d window
- Peak daily
- 3
- highest bucket
Evidence
Source links by recency
3 source links · newest first
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-snmp-dos-ZAqNm4MDsec.cloudapps.cisco.com
No excerpt available.
Vendor Advisorysec.cloudapps.cisco.comAug 5, 2026, 5:16 PM - Cisco Advance Notification for Publication of August 5, 2026, Security AdvisoriesCisco Security Advisories
ry CVE ID Security Impact Rating CVSS Base Score Cisco Catalyst SD-WAN Software Security Hardening Release: August 2026 CVE-2026-20303 CVE-2026-20304 CVE-2026-20310 CVE-2026-20312 CVE-2026-20313 Critical 9.9 Cisco IOS XE Software Security Hardening Release: August 2026 CVE-2026-20267 CVE-2026-20268 CVE-2026-20269 CVE-2026-20270 CVE-2026-20271 CVE-2026-
vendorsec.cloudapps.cisco.comAug 5, 2026, 4:01 PM - Cisco IOS XE Software SNMP Denial of Service VulnerabilityCisco Security Advisories
co.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-snmp-dos-ZAqNm4MD Security Impact Rating: High CVE: CVE-2026-20124
vendorsec.cloudapps.cisco.comAug 5, 2026, 4:00 PM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
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