CVE-2026-20124
Last modified
CVE-2026-20124 is a high-severity vulnerability rated 7.7/10 on the CVSS scale. 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. EPSS estimates a 0.34% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco IOS XE Software | 17.2.1a; 3.18.7SP; 16.12.1y; 16.12.3s; 16.7.1b; 16.6.2; 16.6.5; 16.12.1w; 3.18.4S; 16.9.1d; 17.3.1; 16.9.4c; 16.7.1; 17.2.1; 16.6.8; 16.9.1b; 3.16.8S; 16.9.2s; 16.12.4; 16.12.3a; 17.1.1s; 16.11.1a; 16.7.2; 16.11.1b; 16.9.1s; 16.9.3h; 16.9.1c; 16.6.5a; 16.6.3; 16.10.1f; 17.2.1v; 16.8.1e; 16.9.3a; 16.12.1a; 16.12.1x; 3.16.10aS; 16.6.4s; 16.10.1c; 16.12.3; 16.11.2; 16.6.5b; 16.12.2s; 16.10.1b; 16.7.3; 16.6.7; 16.9.6; 16.9.2; 3.16.10S; 16.10.1; 16.12.1t; 3.18.3bSP; 3.13.9S; 3.18.3aSP; 3.18.5SP; 16.9.1; 16.8.1a; 3.18.8aSP; 16.9.3s; 16.6.7a; 16.12.2; 16.11.1; 16.9.3; 16.11.1s; 16.12.1; 3.16.9S; 17.1.1; 17.1.2; 16.10.1d; 17.1.1t; 16.9.4; 16.8.3; 16.12.2t; 16.9.5; 3.16.7S; 16.8.1s; 16.10.1e; 16.8.2; 16.6.4; 16.8.1b; 16.10.1a; 16.12.1z; 16.8.1c; 16.9.1a; 3.16.7aS; 16.9.5f; 16.6.4a; 16.10.1g; 3.13.10S; 16.8.1; 16.6.6; 16.9.2a; 16.8.1d; 16.10.3; 3.18.4SP; 3.18.6SP; 3.18.3SP; 16.7.1a; 16.11.1c; 16.10.1s; 17.2.1r; 3.16.7bS; 17.1.1a; 16.10.2; 16.12.2a; 3.16.6bS; 16.12.1c; 16.12.1s; 16.7.4; 3.18.9SP; 17.2.2; 16.9.8; 16.9.7; 17.1.3; 17.3.1a; 17.3.2a; 16.12.5; 17.3.1w; 17.3.2; 17.4.1; 16.12.4a; 17.4.1a; 3.16.10bS; 17.3.1x; 17.3.3; 16.6.9; 17.2.3; 17.5.1; 16.12.1z1; 16.12.5a; 17.4.1b; 17.3.1z; 16.12.5b; 17.4.2; 17.3.3a; 17.3.5; 17.3.4; 17.5.1a; 16.12.6; 17.6.1; 16.12.1z2; 16.6.10; 17.3.4a; 17.6.1a; 17.7.1; 17.6.1x; 17.6.2; 16.12.6a; 17.3.4c; 17.4.2a; 17.3.4b; 17.7.1a; 16.12.7; 17.8.1a; 17.6.3a; 17.6.3; 17.7.2; 17.7.1b; 17.9.1w; 17.3.5a; 17.6.1z; 16.12.8; 17.8.1; 17.9.1; 17.6.4; 17.3.5b; 17.9.1a; 17.3.6; 17.10.1; 16.9.8a; 17.6.1z1; 17.10.1a; 17.9.2; 17.6.5; 17.9.1x; 17.9.1y; 16.9.8b; 17.3.7; 17.9.2a; 17.9.3; 16.12.9; 17.11.1; 17.10.1b; 17.6.6; 17.9.1x1; 17.11.1a; 17.9.3a; 17.12.1; 17.3.8; 17.9.4; 16.12.10; 17.12.1w; 17.9.1y1; 17.12.1a; 17.9.5; 17.13.1; 17.12.1x; 17.12.2; 17.14.1; 17.9.4a; 17.3.8a; 17.6.6a; 17.6.5a; 17.6.7; 16.12.10a; 17.15.1; 17.13.1a; 17.12.2a; 16.12.11; 17.12.3; 17.12.1y; 17.12.1z; 17.9.5a; 17.14.1a; 17.9.5b; 17.6.8; 16.12.12; 17.12.4; 17.9.6; 17.17.1; 17.16.1; 17.15.1w; 17.12.3a; 17.9.5c; 17.15.1a; 17.12.1z1; 17.15.2; 17.15.1b; 17.9.5d; 17.15.1x; 17.9.6a; 17.12.1z2; 17.6.8a; 17.16.1a; 16.12.13; 17.15.3; 17.9.7; 17.12.5; 17.15.1y; 17.9.5e; 17.12.4a; 17.15.2a; 17.15.2c; 17.15.2b; 17.12.1z3; 17.9.5f; 17.12.4b; 17.12.5a; 17.18.1; 17.12.6; 17.12.1z4; 17.9.8; 17.9.7a; 17.15.3a; 17.15.4; 17.12.5b; 17.15.3b; 16.12.14; 17.9.7b; 17.12.5c; 17.18.1a; 17.15.4a; 17.18.2; 17.18.1w; 17.15.4b; 17.12.6a; 17.15.4c; 17.9.9; 17.12.5d; 16.12.15; 17.15.4s1; 17.12.1z5; 17.18.1x; 17.12.1z6; 17.15.4d; 17.12.6b; 17.4.1c; 17.18.1y |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
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