7.7
High
CVE-2026-20124 A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS XE Software could allow an…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco IOS XE Software 17.18 | 17.18.1w → 17.18.2 | No fix stated |
| Cisco IOS XE Software | 17.17.1 | No fix stated |
| Cisco IOS XE Software 17.16 | 17.16.1a → 17.16.1 | No fix stated |
| Cisco IOS XE Software 17.15 | 17.15.1w → 17.15.4 | No fix stated |
| Cisco IOS XE Software 17.14 | 17.14.1a → 17.14.1 | No fix stated |
| Cisco IOS XE Software 17.13 | 17.13.1a → 17.13.1 | No fix stated |
| Cisco IOS XE Software 17.12 | 17.12.1w → 17.12.6 | No fix stated |
| Cisco IOS XE Software 17.11 | 17.11.1a → 17.11.1 | No fix stated |
| Cisco IOS XE Software 17.10 | 17.10.1a → 17.10.1 | No fix stated |
Show the 19 other branches Hide the 19 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco IOS XE Software 17.9 | 17.9.1w → 17.9.9 | No fix stated |
| Cisco IOS XE Software 17.8 | 17.8.1a → 17.8.1 | No fix stated |
| Cisco IOS XE Software 17.7 | 17.7.1a → 17.7.2 | No fix stated |
| Cisco IOS XE Software 17.6 | 17.6.1x → 17.6.8 | No fix stated |
| Cisco IOS XE Software 17.5 | 17.5.1a → 17.5.1 | No fix stated |
| Cisco IOS XE Software 17.4 | 17.4.1c → 17.4.2 | No fix stated |
| Cisco IOS XE Software 17.3 | 17.3.1w → 17.3.8 | No fix stated |
| Cisco IOS XE Software 17.2 | 17.2.1v → 17.2.3 | No fix stated |
| Cisco IOS XE Software 17.1 | 17.1.1s → 17.1.3 | No fix stated |
| Cisco IOS XE Software 16.12 | 16.12.1y → 16.12.15 | No fix stated |
| Cisco IOS XE Software 16.11 | 16.11.1s → 16.11.2 | No fix stated |
| Cisco IOS XE Software 16.10 | 16.10.1f → 16.10.3 | No fix stated |
| Cisco IOS XE Software 16.9 | 16.9.1d → 16.9.8 | No fix stated |
| Cisco IOS XE Software 16.8 | 16.8.1e → 16.8.3 | No fix stated |
| Cisco IOS XE Software 16.7 | 16.7.1a → 16.7.4 | No fix stated |
| Cisco IOS XE Software 16.6 | 16.6.2 → 16.6.10 | No fix stated |
| Cisco IOS XE Software 3.18 | 3.18.3SP → 3.18.9SP | No fix stated |
| Cisco IOS XE Software 3.16 | 3.16.6bS → 3.16.10bS | No fix stated |
| Cisco IOS XE Software 3.13 | 3.13.9S → 3.13.10S | No fix stated |
References
- cisco-sa-iosxe-snmp-dos-ZAqNm4MD sec.cloudapps.cisco.com
Timeline
- Published
- Last modified
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