Vulnerability in Cisco iOS Xe Software
CVE-2025-20312
A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS XE Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper error handling when parsing a specific SNMP request. An attacker could exploit this vulnerability by sending a specific SNMP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition. This vulnerability affects SNMP versions 1, 2c, and 3. To exploit this vulnerability through SNMPv2c 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 SNMPv3, 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: 0.004 (30.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Cisco iOS Xe Software — versions 17.2.1, 17.2.1r, 17.2.1a
- Cisco iOS Xe — versions 17.10.1, 17.10.1a, 17.10.1b
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-20312?
- CVE-2025-20312 is a high-severity vulnerability in Cisco iOS Xe Software, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.7/10. Published 2025-09-24.
- How severe is CVE-2025-20312?
- High severity. CVSS v3 base score is 7.7 out of 10.