8.5highHigh

CVE-2021-1493

Cisco Secure Firewall Threat Defense

A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to cause a buffer overflow on an affected system. The vulnerability is due to insufficient boundary checks for specific data that is provided to the web services interface of an affected system. An attacker could exploit this vulnerability by sending a malicious HTTP request. A successful exploit could allow the attacker to cause a buffer overflow condition on the affected system, which could disclose data fragments or cause the device to reload, resulting in a denial of service (DoS) condition.

Exploitation status

  • A vendor advisory or patch reference has been published.

What the metrics mean

  • It is reachable over a network, without needing local access.
  • For an attacker who can reach it, no special conditions are needed to exploit it.
  • To exploit it, an ordinary user account is needed.
  • Beyond that, no action by a user is required.

Scoring

CVSS
8.5 (v3.1)
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:H
Weakness
CWE-120
Assigned by
psirt@cisco.com

Dates

Published
2021-04-29
Last modified
2026-08-11
Sources
NVD

Affected products

  • Cisco Secure Firewall Threat Defense- 6.4.0.12, 6.5.0 - 6.6.3, 6.7.0 - 6.7.0.1
  • Cisco Adaptive Security Appliance Software9.8 - 9.8.4.34, 9.9 - 9.9.2.85, 9.10 - 9.12.4.13, 9.13 - 9.13.1.21, 9.14 - 9.14.2.8, 9.15 - 9.15.1.7

As listed in the NVD configuration data. Not a statement about your estate.

References