CVE-2021-34755: cisco cisco firepower threat defense software Improper Input Validation
CVSS: 7.8v3.1HighModified
Published 27-10-2021Last modified 07-11-2024
Vulnerability summary
CVE-2021-34755 is a high (CVSS 7.8) Improper Input Validation vulnerability in cisco cisco firepower threat defense software. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.4% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v3.1 (NVD)EPSS score
0.27%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 27-10-2021PublishedVulnerability first disclosed.
- 07-11-2024Last modifiedVulnerability information updated.
Description
Multiple vulnerabilities in the CLI of Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to execute arbitrary commands with root privileges. For more information about these vulnerabilities, see the Details section of this advisory.
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 7.8Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSources2 sources · 6.7–7.8
- CVE.orgCNA6.7MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HDiffers
High 7.2Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:C/I:C/A:CSourcesSingle source
EPSS trend
Probability
0.27%
Chance of exploitation in the next 30 days
Percentile
18%
Versus all other CVEs
30-day change
0.00 pp
From 0.27% on 18-09-2026
18-09-202618-10-2026
EPSS score0.27%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
- CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
Affected systems
Cisco4 products
- cisco firepower threat defense softwaren/a
- firepower_management_center_virtual_appliance_firmware6.1.0 | 6.2.0 | 6.2.3 | 6.3.0 | 6.4.0 | 6.4.0.11 | 6.5.0 | 6.6.0 | 6.6.1 | 6.7.0 | 7.0.0 | 7.1.0
- secure_firewall_threat_defense≥ 6.4.0, < 6.4.0.13 | ≥ 6.6.0, < 6.6.5 | ≥ 6.7.0, < 6.7.0.3 | ≥ 7.0.0, < 7.0.1
- sourcefire_defense_center6.1.0 | 6.2.0 | 6.2.3 | 6.3.0 | 6.4.0 | 6.4.0.11 | 6.5.0 | 6.6.0 | 6.6.1 | 6.7.0 | 7.0.0 | 7.1.0
1 vendor · 4 products
References
1 links- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-cmdinject-FmzsLN8Vendor AdvisoryX Refsource CISCO