HIGH CISA KEV

CVE-2025-20352

Q: What is CVE-2025-20352?

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.

Q: Is CVE-2025-20352 actively exploited?

Yes. CVE-2025-20352 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2025-10-20.

Q: What is the CVSS score for CVE-2025-20352?

CVE-2025-20352 has a CVSS v3 base score of 7.7 (HIGH severity).

CVSS v3

7.7

HIGH

EPSS Score

41.5 %

exploit probability, as of 2026-10-19

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-25-282-02 CISA4 known affected
Rockwell Automation Lifecycle Services with Cisco
Rockwell Automation Industrial Data Center (IDC) with Cisco Switching: >=Generations_1|<=5 · Rockwell Automation IDC-Managed Support contract with Cisco Switching: >=Generations_1|<=5 · Rockwell Automation Network-Managed Support contract with Cisco network switch: vers:all/*
ICSA-25-282-03 CISA5 known affected
Rockwell Automation Stratix
Rockwell Automation Stratix 5700: <=v15.28E7 · Rockwell Automation Stratix 5400: <=v15.28E7 · Rockwell Automation Stratix 5410: <=v15.28E7

Full record on NVD

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.

CISA Known Exploited Vulnerability

Date Added: 2025-09-29
Patch Due Date: 2025-10-20
Ransomware Use: Unknown

Technical details

Published: 2025-09-24

Frequently asked questions

What is CVE-2025-20352?

Is CVE-2025-20352 actively exploited?

Yes. CVE-2025-20352 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2025-10-20.

What is the CVSS score for CVE-2025-20352?

CVE-2025-20352 has a CVSS v3 base score of 7.7 (HIGH severity).

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