TI-2021-01221 Aliases CVE-2021-1494 GHSA-wh72-9gx8-gwhv

Protection mechanism failure in Cisco Firepower Threat Defense Software

LOW 34CWE-693Published 2024-11-15 · Updated 2024-11-15

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-693.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01101 65th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco Firepower Threat Defense Software	N/A	—	No fix listed	CNA
Cisco	Cisco UTD SNORT IPS Engine Software	16.12.1a; 16.12.2; 16.12.3; 16.12.4; 16.6.1; 16.6.5; 16.6.6; 16.6.7a; 16.6.9; 17.1.1; 17.2.1r; 17.3.1a; 17.3.2; 3.17.0S; 3.17.1S; Fuji-16.9.2; Fuji-16.9.4; Fuji-16.9.6; Fuji-16.9.3; Fuji-16.9.7; Fuji-16.9.5; Denali-16.3.3; Denali-16.3.9; Denali-16.3.7; Denali-16.3.5; Denali-16.3.4; Everest-16.6.3; Everest-16.6.4; Everest-16.6.2	—	No fix listed	CNA

Cisco Firepower Threat Defense Software VendorCisco Affected N/A Fixed in — No fix listed CNA
Cisco UTD SNORT IPS Engine Software VendorCisco Affected 16.12.1a; 16.12.2; 16.12.3; 16.12.4; 16.6.1; 16.6.5; 16.6.6; 16.6.7a; 16.6.9; 17.1.1; 17.2.1r; 17.3.1a; 17.3.2; 3.17.0S; 3.17.1S; Fuji-16.9.2; Fuji-16.9.4; Fuji-16.9.6; Fuji-16.9.3; Fuji-16.9.7; Fuji-16.9.5; Denali-16.3.3; Denali-16.3.9; Denali-16.3.7; Denali-16.3.5; Denali-16.3.4; Everest-16.6.3; Everest-16.6.4; Everest-16.6.2 Fixed in — No fix listed CNA

CPE names CISA-ADP · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:cisco:firepower_threat_defense_software::::::::	—	—	Cisco
cpe:2.3:a:cisco:utd_snort_ips_engine_software::::::::	—	—	Cisco

cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:* Versions — — ·Cisco
cpe:2.3:a:cisco:utd_snort_ips_engine_software:*:*:*:*:*:*:*:* Versions — — ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-1494
2026-10-03 Alias added: GHSA-wh72-9gx8-gwhv

References

Other 1

cisco-sa-http-fp-bp-KfDdcQhc

TI-2026-74174 Arbitrary file write in Cisco Secure Email Gateway via AMP feature KEVCVSS 3.1CRITICAL 9.8
TI-2026-53490 Cisco Catalyst SD-WAN Manager System Account Authorization Bypass Vulnerability KEVCVSS 3.1CRITICAL 9.8
TI-2026-53489 Cisco Secure Email Gateway SQL Injection Vulnerability KEVCVSS 3.1CRITICAL 9.8
TI-2026-53488 Cisco Identity Services Engine Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
TI-2026-16388 Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
TI-2026-16344 Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0

See all 7059 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences