Vulnerability in Cisco Firepower Threat Defense Software
CVE-2021-1494
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.011 (64.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Cisco Firepower Threat Defense Software
- Cisco Utd Snort Ips Engine Software — versions 16.12.1a, 16.12.2, 16.12.3
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2021-1494?
- CVE-2021-1494 is a medium-severity vulnerability in Cisco Firepower Threat Defense Software, classified under Protection Mechanism Failure. CVSS score: 5.8/10. Published 2024-11-15.
- How severe is CVE-2021-1494?
- Medium severity. CVSS v3 base score is 5.8 out of 10.