CVE-2021-34787
medium
Cisco CVSS v3 Base Score
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS Score
1.0%
Exploitation probability in 30 days
Top 40% 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: October 27, 2021 (1775 days ago)
Last Modified: August 11, 2026
Vendor: Cisco
Source: NVD
Vulnerability Report
Generated by CyberWatcher
Description
A vulnerability in the identity-based firewall (IDFW) rule processing feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass security protections. This vulnerability is due to improper handling of network requests by affected devices configured to use object group search. An attacker could exploit this vulnerability by sending a specially crafted network request to an affected device. A successful exploit could allow the attacker to bypass access control list (ACL) rules on the device, bypass security protections, and send network traffic to unauthorized hosts.
CWE
CWE-183Affected Products
cisco adaptive security appliancecisco secure firewall threat defensecisco adaptive security appliance softwarecisco asa 5512-x firmwarecisco asa 5505 firmwarecisco asa 5515-x firmwarecisco asa 5525-x firmwarecisco asa 5545-x firmwarecisco asa 5555-x firmwarecisco asa 5580 firmware