Vulnerability · Published Sep 24, 2025 · Assigned by cisco

CVE-2025-20327

High 7.7

In plain English

A high-severity security flaw in IOS from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities).

Severity (CVSS 3.1)7.7High

Exploit odds (30 days)0.4%top 63.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Cisco	IOS	15.2(6)E215.2(7)E15.2(6)E2a15.2(6)E2b15.2(7)E115.2(7)E0a15.2(7)E0b15.2(7)E0s

Weakness: CWE-1287 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

References

cisco-sa-ios-invalid-url-dos-Nvxszf6u