PatchTheCVECVE-2025-20149: A vulnerability in the CLI of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local
CVE-2025-20149 is a medium-severity flaw (CVSS 6.5) affecting ios, ios xe. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A vulnerability in the CLI of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to a buffer overflow. An attacker with a low-privileged account could exploit this vulnerability by using crafted commands at the CLI prompt. A successful exploit could allow the attacker to cause th
Why this priority
- No elevated risk signals yet
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 85%) |
| CISA exploited list | No |
| Weakness | CWE-120 |
| Published | 2025-09-24 |
| Last modified | 2026-09-26 |
Last updated 2026-09-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2025-20149?
ios: mitigate or apply the listed mitigation; ios xe: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2025-20149 being exploited?
CVE-2025-20149 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2025-20149 affect?
CVE-2025-20149 affects ios, ios xe. Severity is medium (CVSS 6.5). A vulnerability in the CLI of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerabil
How urgent is CVE-2025-20149?
Priority 26/100. No elevated risk signals yet.
Software pages
iOS vulnerabilities · Cisco IOS XE vulnerabilities · Cisco vulnerabilities
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