CVE-2021-1495

medium Cisco
CVSS v3 Base Score
5.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
EPSS Score
1.7%
Exploitation probability in 30 days
Top 25% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Published: April 29, 2021 (1956 days ago)
Last Modified: August 11, 2026
Vendor: Cisco
Source: NVD

Description

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. The vulnerability is due to incorrect handling of specific HTTP header parameters. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass a configured file policy for HTTP packets and deliver a malicious payload.

CWE

CWE-755

Affected Products

cisco secure firewall threat defensecisco ios xesnort snort

References

🔗 lists.debian.org 🔗 tools.cisco.com 🔗 www.debian.org 🔗 lists.debian.org 🔗 tools.cisco.com