Cisco Cisco Firepower Extensible Operating System (FXOS)

Name: Cisco Cisco Firepower Extensible Operating System (FXOS)
Brand: Cisco

productEU

A product tracked in the threat graph; the vulnerabilities below are known to affect it.

by severity

4critical15high12medium0low

updated 2026-10-28

vulnerabilities (33)

Related CVEs.

sort

ID	severity	EPSS	exploitable	patched	published	affected
CVE-2021-40438US	critical9.0OT critical	100.0% (100th)	KEV	no fix	2021-09-16	—
CVE-2021-34798US	high7.5	64.5% (99th)	—	no fix	2021-09-16	—
CVE-2021-36160US	high7.5	62.9% (99th)	—	no fix	2021-09-16	—
CVE-2021-33193US	high7.5	46.2% (99th)	—	no fix	2021-08-16	—
CVE-2021-39275US	critical9.8	39.4% (99th)	—	no fix	2021-09-16	—
CVE-2018-0304US	critical9.8	8.42% (95th)	—	no fix	2018-06-20	—
CVE-2018-0300US	high7.2	7.24% (94th)	—	no fix	2018-06-21	—
CVE-2018-0314US	critical9.8	5.76% (93rd)	—	no fix	2018-06-20	—
CVE-2019-1858US	high8.6	2.39% (84th)	—	n/a	2019-05-16	unspecified → n/a
CVE-2018-0305US	high8.6	2.27% (83rd)	—	no fix	2018-06-21	—
CVE-2018-0298US	high7.5	1.98% (80th)	—	no fix	2018-06-21	—
CVE-2020-3517US	high8.6	1.38% (72nd)	—	no fix	2020-08-27	—
CVE-2017-12329US	medium6.3	1.10% (66th)	—	no fix	2017-11-30	—
CVE-2018-0303US	high8.8	1.08% (65th)	—	no fix	2018-06-21	—
CVE-2019-12699US	high7.8	0.91% (60th)	—	n/a	2019-10-02	unspecified → n/a
CVE-2018-0395US	medium5.3	0.79% (56th)	—	no fix	2018-10-17	—
CVE-2026-20099US	—	0.74% (55th)	—	no fix	2026-02-25	83 versions
CVE-2023-20200US	medium6.3	0.68% (52nd)	—	no fix	2023-08-23	18 versions
CVE-2019-1700US	medium6.1	0.50% (43rd)	—	no fix	2019-02-21	2 versions
CVE-2021-1368US	high8.8	0.46% (39th)	—	no fix	2021-02-24	—
CVE-2020-3169US	medium6.7	0.45% (39th)	—	n/a	2020-02-26	unspecified → n/a
CVE-2018-0302US	high7.8	0.43% (37th)	—	no fix	2018-06-21	—
CVE-2021-34714US	high7.4	0.39% (33rd)	—	no fix	2021-09-23	—
CVE-2020-3545US	medium6.7	0.39% (33rd)	—	no fix	2020-09-04	≤ n/a
CVE-2020-3459US	high7.8	0.38% (32nd)	—	no fix	2020-10-21	≤ n/a
CVE-2020-3455US	high7.8	0.35% (28th)	—	no fix	2020-10-21	≤ n/a
CVE-2022-20865US	medium6.7	0.34% (28th)	—	no fix	2022-08-25	≤ n/a
CVE-2024-20294US	medium6.6	0.32% (25th)	—	no fix	2024-02-29	99 versions
CVE-2022-20934US	medium6.7	0.29% (21st)	—	no fix	2022-11-15	74 versions
CVE-2020-3166US	medium6.7	0.29% (21st)	—	n/a	2020-02-26	2 versions
CVE-2019-1728US	medium6.7	0.24% (16th)	—	no fix	2019-05-15	—
CVE-2026-20091US	—	0.20% (10th)	—	no fix	2026-02-25	5 versions
CVE-2023-20234US	medium6.0	0.18% (8th)	—	no fix	2023-08-23	85 versions

weaknesses (8)

The flaw types (CWEs) most of these CVEs share.

CWE-20Improper Input Validation10 CVEs
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')6 CVEs
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer5 CVEs
CWE-476NULL Pointer Dereference3 CVEs
CWE-787Out-of-bounds Write3 CVEs
CWE-125Out-of-bounds Read2 CVEs
CWE-732Incorrect Permission Assignment for Critical Resource2 CVEs
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')2 CVEs

sources (2)

Which sources assert this record, and when.

USCisco PSIRT (CSAF)20 CVEs
EUEU Vulnerability Database (ENISA)15 CVEs

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