Vulnerability in Cisco iOS Xe Software
CVE-2025-20172
A vulnerability in the SNMP subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an authenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to improper error handling when parsing SNMP requests. An attacker could exploit this vulnerability by sending a crafted SNMP request to an affected device. For Cisco IOS and IOS XE Software, a successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition. For Cisco IOS XR Software, a successful exploit could allow the attacker to cause the SNMP process to restart, resulting in an interrupted SNMP response from an affected device. Devices that are running Cisco IOS XR Software will not reload. This vulnerability affects SNMP versions 1, 2c, and 3. To exploit this vulnerability through SNMP v2c or earlier, the attacker must know a valid read-write or read-only SNMP community string for the affected system. To exploit this vulnerability through SNMP v3, the attacker must have valid SNMP user credentials for the affected system.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.008 (53.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Cisco iOS Xe Software — versions 3.7.0S, 3.7.1S, 3.7.2S
- Cisco iOS Xr Software — versions 7.0.1, 7.0.2, 7.0.12
- Cisco iOS — versions 15.6\(2\)sp7, 15.2(4)ec2, 15.2(4)jb1
- Cisco iOS Xe — versions 3.2.0se, 3.2.1se, 3.2.2se
- Cisco iOS Xr — versions 7.0.1, 7.0.2, 7.0.12
Weakness classification (CWE)
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2025-20172?
- CVE-2025-20172 is a high-severity vulnerability in Cisco iOS Xe Software, classified under CWE-248. CVSS score: 7.7/10. Published 2025-02-05.
- How severe is CVE-2025-20172?
- High severity. CVSS v3 base score is 7.7 out of 10.
- Is CVE-2025-20172 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.