Cisco IOS Software SNMP Remote Code Execution Vulnerability
- Severity
- High8.8CVSS 3.1, High
- EPSS
- 7%
- Published
- 17 Jul 2017
- Updated
- 17 Jun 2026
Description
Title, description and vendor guidance are quoted from the source records.
The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow an authenticated, remote attacker to remotely execute code on an affected system or cause an affected system to reload. An attacker could exploit these vulnerabilities by sending a crafted SNMP packet to an affected system via IPv4 or IPv6. Only traffic directed to an affected system can be used to exploit these vulnerabilities. The vulnerabilities are due to a buffer overflow condition in the SNMP subsystem of the affected software. The vulnerabilities affect all versions of SNMP - Versions 1, 2c, and 3. To exploit these vulnerabilities via SNMP Version 2c or earlier, the attacker must know the SNMP read-only community string for the affected system. To exploit these vulnerabilities via SNMP Version 3, the attacker must have user credentials for the affected system. A successful exploit could allow the attacker to execute arbitrary code and obtain full control of the affected system or cause the affected system to reload. Customers are advised to apply the workaround as contained in the Workarounds section below. Fixed software information is available via the Cisco IOS Software Checker. All devices that have enabled SNMP and have not explicitly excluded the affected MIBs or OIDs should be considered vulnerable. There are workarounds that address these vulnerabilities.
Weakness: CWE-119
Known exploited
Added to CISA KEV on 3 Mar 2022
Federal remediation due date: 24 Mar 2022
Required action: Apply updates per vendor instructions.
Exploit prediction
7% probability of exploitation in the next 30 days (percentile 94%).
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Patcharo shows this vulnerability for information but does not match versions for this product yet.
- Cisco IOS · 12.1(3)XI, 12.2(1b)DA, 12.2(5)DA, 12.2(7)DA, 12.2(12)DA, 12.2(10)DA5, 12.2(12)DA10, 12.2(10)DA, 12.2(12)DA1, 12.2(12)DA6, 12.2(10)DA8, 12.2(12)DA8 and 810 more
- IntelliShield Universal Product · N/A
References
Provenance
Every fact on this page comes from the sources below. Nothing is written by an AI.
- Cisco (CVE record)
- Cisco (CVE record) · 27 Sept 2026, 23:46 UTC · Parser patcharo-cve5/1.1.0
- CISA Known Exploited Vulnerabilities
- CISA Known Exploited Vulnerabilities · 27 Sept 2026, 23:42 UTC · Parser patcharo-kev/1.0.0
- NVD
- NVD · 27 Sept 2026, 23:44 UTC · Parser patcharo-nvd/1.0.0
- FIRST EPSS
- FIRST EPSS · 27 Sept 2026, 23:46 UTC · Parser patcharo-epss/1.0.0
Last verified: 28 Sept 2026, 02:31 UTC