Vulnerability details
CVE-2026-20124
Cisco IOS XE Software
Cisco IOS XE Software SNMP Denial of Service Vulnerability
CVSS 3.1
7.7High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.7High | 3.1 | CVEProject cvelistV5 (CNA) (cisco) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
Affected products
200 of 277| Vendor | Product | Versions | Source |
|---|---|---|---|
| Cisco | Cisco IOS XE Software | 16.10.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.10.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.10.1b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.10.1c | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.10.1d | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.10.1e | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.10.1f | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.10.1g | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.10.1s | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.10.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.10.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.11.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.11.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.11.1b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.11.1c | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.11.1s | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.11.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.10 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.10a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.11 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.12 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.13 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.14 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.15 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.1c | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.1s | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.1t | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.1w | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.1x | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.1y | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.1z | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.1z1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.1z2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.2a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.2s | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.2t | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.3a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.3s | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.4 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.4a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.5 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.5a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.5b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.6 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.6a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.7 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.8 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.12.9 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.6.10 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.6.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.6.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.6.4 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.6.4a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.6.4s | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.6.5 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.6.5a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.6.5b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.6.6 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.6.7 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.6.7a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.6.8 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.6.9 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.7.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.7.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.7.1b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.7.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.7.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.7.4 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.8.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.8.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.8.1b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.8.1c | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.8.1d | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.8.1e | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.8.1s | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.8.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.8.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.1b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.1c | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.1d | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.1s | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.2a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.2s | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.3a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.3h | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.3s | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.4 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.4c | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.5 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.5f | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.6 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.7 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.8 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.8a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 16.9.8b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.1.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.1.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.1.1s | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.1.1t | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.1.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.1.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.10.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.10.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.10.1b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.11.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.11.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.1w | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.1x | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.1y | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.1z | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.1z1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.1z2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.1z3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.1z4 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.1z5 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.1z6 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.2a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.3a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.4 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.4a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.4b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.5 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.5a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.5b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.5c | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.5d | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.6 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.6a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.12.6b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.13.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.13.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.14.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.14.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.1b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.1w | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.1x | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.1y | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.2a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.2b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.2c | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.3a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.3b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.4 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.4a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.4b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.4c | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.4d | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.15.4s1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.16.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.16.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.17.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.18.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.18.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.18.1w | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.18.1x | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.18.1y | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.18.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.2.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.2.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.2.1r | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.2.1v | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.2.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.2.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.1a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.1w | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.1x | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.1z | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.2a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.3a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.4 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.4a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.4b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.4c | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.5 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.5a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.5b | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.6 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.7 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.8 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.3.8a | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XE Software | 17.4.1 | CVEProject cvelistV5 (CNA) |
References and advisories
1
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Details
- Published
- 2026-08-05
- Last updated
- 2026-08-05
- State
- Published
- Assigner (CNA)
- cisco
Exploit prediction (EPSS)
0.5%
Probability of exploitation in 30 days
43.1%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-772Missing Release of Resource after Effective Lifetime