CVE-2025-20327

7.7 highEPSS 0.4%

High (7.7) in cisco ios. EPSS 0.4% chance of exploitation in the next 30 days.

A vulnerability in the web UI of Cisco IOS Software could allow an authenticated, remote attacker with low privileges to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper input validation. An attacker could exploit this vulnerability by sending a crafted URL in an HTTP request. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Severity

CVSS 3.1

7.7 high

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 33% of CVEs (scores of 2026-10-31)
CWE: CWE-1287
Published: 2025-09-24
Modified: 2026-09-26
Record from: the NVD, synced 2026-10-19

Affected

cisco:ios

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-invalid-url-dos-Nvxszf6u

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