6.7

CVE-2026-20099: cisco cisco firepower extensible operating system (fxos) OS Command Injection

CVSS: 6.7v3.1MediumDeferred
Published 25-02-2026Last modified 26-02-2026
Open JSON

Vulnerability summary

CVE-2026-20099 is a medium (CVSS 6.7) OS Command Injection vulnerability in cisco cisco firepower extensible operating system (fxos). EPSS estimates a 0.68% chance of exploitation in the next 30 days, higher than 51.4% of scored vulnerabilities.

Overall risk
27/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.7/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.68%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 25-02-2026
    PublishedVulnerability first disclosed.
  2. 26-02-2026
    Last modifiedVulnerability information updated.

Description

A vulnerability in the web-based management interface of Cisco FXOS Software and Cisco UCS Manager Software could allow an authenticated, local attacker with administrative privileges to perform command injection attacks on an affected system and elevate privileges to root. This vulnerability is due to insufficient input validation of command arguments supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and submitting crafted input to the affected command. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system of the affected device with root-level privileges.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.68%

Chance of exploitation in the next 30 days

Percentile

51%

Versus all other CVEs

30-day change

+0.04 pp

From 0.64% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.68%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco3 products
  • cisco firepower extensible operating system (fxos)2.3.1.99 | 2.3.1.56 | 2.3.1.110 | 2.3.1.58 | 2.6.1.174 | 2.6.1.157 | 2.3.1.91 | 2.3.1.73 | 2.3.1.66 | 2.6.1.166 | 2.3.1.111 | 2.3.1.166 | 2.3.1.144 | 2.6.1.131 | 2.3.1.130 | 2.3.1.88 | 2.6.1.169 | 2.3.1.75 | 2.3.1.93 | 2.3.1.145 | 2.3.1.155 | 2.6.1.187 | 2.3.1.173 | 2.3.1.179 | 2.6.1.192 | 2.3.1.180 | 2.6.1.204 | 2.6.1.214 | 2.3.1.190 | 2.6.1.224 | 2.6.1.229 | 2.3.1.215 | 2.10.1.159 | 2.3.1.216 | 2.6.1.230 | 2.10.1.166 | 2.6.1.238 | 2.6.1.239 | 2.11.1.154 | 2.10.1.179 | 2.3.1.219 | 2.6.1.254 | 2.12.0.31 | 2.12.0.432 | 2.10.1.207 | 2.3.1.230 | 2.6.1.259 | 2.11.1.182 | 2.12.0.450 | 2.10.1.234 | 2.13.0.198 | 2.12.0.467 | 2.13.0.212 | 2.6.1.264 | 2.10.1.245 | 2.11.1.200 | 2.12.0.498 | 2.10.1.271 | 2.12.1.29 | 2.13.0.243 | 2.11.1.205 | 2.6.1.265 | 2.12.1.48 | 2.14.1.131 | 2.13.0.276 | 2.11.1.228 | 2.12.1.72 | 2.10.1.312 | 2.6.1.272 | 2.14.1.143 | 2.14.1.163 | 2.14.1.167 | 2.12.1.84 | 2.16.0.128 | 2.10.1.328 | 2.10.1.341 | 2.11.1.236 | 2.12.1.95 | 2.13.0.357 | 2.16.0.136 | 2.14.1.186 | 2.17.0.518 | 2.14.1.187
  • cisco secure firewall adaptive security appliance (asa) software9.12.2 | 9.12.1 | 9.12.3 | 9.12.4 | 9.12.3.2 | 9.12.3.12 | 9.12.2.5 | 9.12.1.2 | 9.12.2.1 | 9.12.3.7 | 9.12.2.9 | 9.12.3.9 | 9.12.1.3 | 9.12.4.2 | 9.12.4.4 | 9.12.4.7 | 9.12.4.8 | 9.12.4.10 | 9.12.4.13 | 9.12.4.18 | 9.12.4.24 | 9.16.1 | 9.12.4.26 | 9.16.1.28 | 9.12.4.29 | 9.16.2 | 9.12.4.30 | 9.16.2.3 | 9.12.4.35 | 9.16.2.7 | 9.12.4.37 | 9.17.1 | 9.16.2.11 | 9.16.2.13 | 9.12.4.39 | 9.12.4.38 | 9.16.2.14 | 9.17.1.7 | 9.12.4.40 | 9.16.3.3 | 9.16.3 | 9.17.1.9 | 9.16.3.14 | 9.12.4.41 | 9.17.1.10 | 9.18.1 | 9.12.4.47 | 9.16.3.15 | 9.18.1.3 | 9.17.1.11 | 9.12.4.48 | 9.18.2 | 9.16.3.19 | 9.17.1.13 | 9.12.4.50 | 9.17.1.15 | 9.12.4.52 | 9.16.3.23 | 9.18.2.5 | 9.16.4 | 9.12.4.54 | 9.17.1.20 | 9.18.2.7 | 9.19.1 | 9.16.4.9 | 9.12.4.55 | 9.18.2.8 | 9.16.4.14 | 9.18.3 | 9.19.1.5 | 9.12.4.56 | 9.17.1.30 | 9.19.1.9 | 9.18.3.39 | 9.16.4.19 | 9.12.4.58 | 9.19.1.12 | 9.18.3.46 | 9.16.4.27 | 9.19.1.18 | 9.18.3.53 | 9.18.3.55 | 9.16.4.38 | 9.17.1.33 | 9.12.4.62 | 9.16.4.39 | 9.18.3.56 | 9.16.4.42 | 9.19.1.22 | 9.18.4 | 9.18.4.5 | 9.19.1.24 | 9.16.4.48 | 9.18.4.8 | 9.20.2 | 9.19.1.27 | 9.12.4.65 | 9.16.4.55 | 9.18.4.22 | 9.20.2.10 | 9.16.4.57 | 9.19.1.28 | 9.17.1.39 | 9.12.4.67 | 9.18.4.24 | 9.20.2.21 | 9.16.4.61 | 9.19.1.31 | 9.18.4.29 | 9.20.2.22 | 9.16.4.62 | 9.18.4.34 | 9.20.3 | 9.16.4.67 | 9.18.4.40 | 9.16.4.71 | 9.20.3.4 | 9.18.4.47 | 9.20.3.7 | 9.17.1.45 | 9.19.1.37 | 9.16.4.76 | 9.18.4.50 | 9.20.3.10 | 9.18.4.52 | 9.20.3.13 | 9.18.4.53 | 9.16.4.82 | 9.20.3.16 | 9.19.1.42 | 9.18.4.57 | 9.16.4.84 | 9.20.3.20 | 9.20.4 | 9.20.4.7
  • cisco unified computing system (managed)4.0(4h) | 4.1(1a) | 4.0(1c) | 4.0(4a) | 4.0(1a) | 4.0(1d) | 4.1(1c) | 4.0(2a) | 4.0(4g) | 4.0(2e) | 4.0(4c) | 4.0(4f) | 4.0(1b) | 4.0(2b) | 4.0(2d) | 4.1(1b) | 4.0(4d) | 4.0(4e) | 4.0(4b) | 4.1(2a) | 4.1(1d) | 4.0(4i) | 4.1(1e) | 4.1(2b) | 4.0(4k) | 4.1(3a) | 4.1(3b) | 4.1(2c) | 4.0(4l) | 4.1(4a) | 4.1(3c) | 4.1(3d) | 4.2(1c) | 4.2(1d) | 4.0(4m) | 4.1(3e) | 4.2(1f) | 4.1(3f) | 4.2(1i) | 4.1(3h) | 4.2(1k) | 4.2(1l) | 4.0(4n) | 4.2(1m) | 4.1(3i) | 4.2(2a) | 4.2(1n) | 4.1(3j) | 4.2(2c) | 4.2(2d) | 4.2(3b) | 4.1(3k) | 4.0(4o) | 4.2(2e) | 4.2(3d) | 4.2(3e) | 4.2(3g) | 4.1(3l) | 4.3(2b) | 4.2(3h) | 4.2(3i) | 4.3(2c) | 4.1(3m) | 4.3(2e) | 4.3(3a) | 4.2(3j) | 4.3(3c) | 4.3(4a) | 4.2(3k) | 4.3(4b) | 4.3(4c) | 4.2(3l) | 4.3(4d) | 4.3(2f) | 4.2(3m) | 4.3(5a) | 4.3(4e) | 4.1(3n) | 4.3(4f) | 4.2(3n) | 4.3(5c) | 4.2(3o) | 4.3(5d) | 4.3(6a) | 4.3(6b) | 4.3(5e) | 4.2(3p)

1 vendor · 3 products

References

1 links