--- title: "CVE-2025-20352: Stack-based Buffer Overflow | CubePath" description: "A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software and Cisco IOS XE Software could allow the following…" language: en source: https://cubepath.com/security/cve/CVE-2025-20352 --- # CVE-2025-20352: Stack-based Buffer Overflow | CubePath ## Description A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software and Cisco IOS XE Software could allow the following: An authenticated, remote attacker with low privileges could cause a denial of service (DoS) condition on an affected device that is running Cisco IOS Software or Cisco IOS XE Software. To cause the DoS, the attacker must have the SNMPv2c or earlier read-only community string or valid SNMPv3 user credentials. An authenticated, remote attacker with high privileges could execute code as the root user on an affected device that is running Cisco IOS XE Software. To execute code as the root user, the attacker must have the SNMPv1 or v2c read-only community string or valid SNMPv3 user credentials and administrative or privilege 15 credentials on the affected device. An attacker could exploit this vulnerability by sending a crafted SNMP packet to an affected device over IPv4 or IPv6 networks. This vulnerability is due to a stack overflow condition in the SNMP subsystem of the affected software. A successful exploit could allow a low-privileged attacker to cause the affected system to reload, resulting in a DoS condition, or allow a high-privileged attacker to execute arbitrary code as the root user and obtain full control of the affected system. Note: This vulnerability affects all versions of SNMP. Official description from the CVE record, published by cisco. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-20352) ## Key data ### CVSS 3.1 High 7.7 Score published by cisco in the CVE record. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H | Metric | Value | What it means | | ---------------------- | ------- | ----------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | Low | A basic user account is needed. | | User interaction | None | No action from any user is needed. | | Scope | Changed | The impact can reach other components beyond the vulnerable one. | | Confidentiality impact | None | No effect on the secrecy of data. | | Integrity impact | None | No effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.40575 (40.6% probability) Percentile 98.7% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA Known Exploited Vulnerabilities This CVE is listed in the CISA KEV catalog. Name in the catalog Cisco IOS and IOS XE Software SNMP Denial of Service and Remote Code Execution Vulnerability Added to the catalog Sep 29, 2025 Federal due date Oct 20, 2025 ### CISA assessment as of Sep 27, 2025 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Recorded by CISA as active Automatable no Technical impact total ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-121](https://cwe.mitre.org/data/definitions/121.html) Stack-based Buffer Overflow ## Affected products Products listed in the CVE record, as the CNA published them. - Cisco IOS - affected: 12.2(55)SE - affected: 12.2(55)SE3 - affected: 12.2(55)SE2 - affected: 12.2(58)SE - affected: 12.2(55)SE1 - affected: 12.2(58)SE1 - affected: 12.2(55)SE4 - affected: 12.2(58)SE2 - affected: 12.2(55)SE5 - affected: 12.2(55)SE6 - affected: 12.2(55)SE7 - affected: 12.2(55)SE8 - affected: 12.2(55)SE9 - affected: 12.2(55)SE10 - affected: 12.2(55)SE11 - affected: 12.2(55)SE12 - affected: 12.2(55)SE13 - affected: 12.2(58)EZ - affected: 12.2(53)EZ - affected: 12.2(55)EZ - affected: 12.2(60)EZ - affected: 12.2(60)EZ1 - affected: 12.2(60)EZ2 - affected: 12.2(60)EZ3 - affected: 12.2(60)EZ4 - and 701 more - Cisco IOS XE Software - affected: 3.5.0E - affected: 3.5.1E - affected: 3.5.2E - affected: 3.5.3E - affected: 3.6.0E - affected: 3.6.1E - affected: 3.6.2aE - affected: 3.6.2E - affected: 3.6.3E - affected: 3.6.4E - affected: 3.6.5E - affected: 3.6.6E - affected: 3.6.5aE - affected: 3.6.7E - affected: 3.6.8E - affected: 3.6.7bE - affected: 3.6.9E - affected: 3.6.10E - affected: 3.14.0S - affected: 3.14.1S - affected: 3.14.2S - affected: 3.14.3S - affected: 3.14.4S - affected: 3.15.0S - affected: 3.15.1S - and 324 more - Cisco IOS XE Catalyst SD-WAN - affected: 16.9.1 - affected: 16.9.2 - affected: 16.9.3 - affected: 16.9.4 - affected: 16.10.1 - affected: 16.10.2 - affected: 16.10.3 - affected: 16.10.3a - affected: 16.10.3b - affected: 16.10.4 - affected: 16.10.5 - affected: 16.10.6 - affected: 16.11.1a - affected: 16.12.1b - affected: 16.12.1d - affected: 16.12.1e - affected: 16.12.2r - affected: 16.12.3 - affected: 16.12.4 - affected: 16.12.4a - affected: 16.12.5 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [cisco-sa-snmp-x4LPhte](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-x4LPhte) (sec.cloudapps.cisco.com) ## Timeline 1. ID reserved Oct 10, 2024 2. Record published Sep 24, 2025 3. Added to CISA KEV Sep 29, 2025 4. Record last updated Feb 26, 2026 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:16 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)