CVE-2020-3309

highpriority · track · 30EPSS 0.018 · 78 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.77% (78th) EPSS

CVSS 9 · high

Is it mine?

35 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cisco_csaf

EPSS · scored 2026-10-27

A vulnerability in Cisco Firepower Device Manager (FDM) On-Box software could allow an authenticated, remote attacker to overwrite arbitrary files on the underlying operating system of an affected device. The vulnerability is due to improper input validation. An attacker could exploit this vulnerability by uploading a malicious file to an affected device. A successful exploit could allow the attacker to overwrite arbitrary files on as well as modify the underlying operating system of an affected device.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No fix is available; mitigate or reduce exposure.

No fix available5.3.0cisco_csaf
No remediation is available at this time.
No fix available5.4.0cisco_csaf
No remediation is available at this time.
No fix available6.0.0cisco_csaf
No remediation is available at this time.
No fix available6.0.0.1cisco_csaf
No remediation is available at this time.
No fix available6.0.1cisco_csaf
No remediation is available at this time.
No fix available6.0.1.1cisco_csaf
No remediation is available at this time.
No fix available6.0.1.2cisco_csaf
No remediation is available at this time.
No fix available6.0.1.3cisco_csaf
No remediation is available at this time.
No fix available6.0.1.4cisco_csaf
No remediation is available at this time.
No fix available6.1.0cisco_csaf
No remediation is available at this time.
No fix available6.1.0.1cisco_csaf
No remediation is available at this time.
No fix available6.1.0.2cisco_csaf
No remediation is available at this time.
No fix available6.1.0.3cisco_csaf
No remediation is available at this time.
No fix available6.1.0.4cisco_csaf
No remediation is available at this time.
No fix available6.1.0.5cisco_csaf
No remediation is available at this time.
No fix available6.1.0.6cisco_csaf
No remediation is available at this time.
No fix available6.1.0.7cisco_csaf
No remediation is available at this time.
No fix available6.2.0cisco_csaf
No remediation is available at this time.
No fix available6.2.0.1cisco_csaf
No remediation is available at this time.
No fix available6.2.0.2cisco_csaf
No remediation is available at this time.
No fix available6.2.0.3cisco_csaf
No remediation is available at this time.
No fix available6.2.0.4cisco_csaf
No remediation is available at this time.
No fix available6.2.0.5cisco_csaf
No remediation is available at this time.
No fix available6.2.0.6cisco_csaf
No remediation is available at this time.
No fix available6.2.0.7cisco_csaf
No remediation is available at this time.
No fix available6.2.1cisco_csaf
No remediation is available at this time.
No fix available6.2.2cisco_csaf
No remediation is available at this time.
No fix available6.2.2.1cisco_csaf
No remediation is available at this time.
No fix available6.2.2.2cisco_csaf
No remediation is available at this time.
No fix available6.2.2.3cisco_csaf
No remediation is available at this time.
No fix available6.2.2.4cisco_csaf
No remediation is available at this time.
No fix available6.2.2.5cisco_csaf
No remediation is available at this time.

cvss

Technical severity, 0–10. One row per scoring source.

9.0

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–9

v2.09highAV:N/AC:L/Au:S/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 8 · impact 10

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.2 · impact 5.9

v3.06.5mediumCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:Hsecondary · ENISA EU

v3.06.5mediumCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:Hsecondary · psirt@cisco.com USexploitability 1.2 · impact 5.2

v3.06.5mediumCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:Hsecondary · Cisco PSIRT US

v3.17.2highAV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.16.6mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-20USCWE-20USCWE-787US

affected products (35)

Products and version ranges known to be affected.

showing 20 of 35

advisories (1)

Vendor and ecosystem advisories describing this.

cisco-sa-fdmfo-HvPWKxDeCisco Firepower Device Manager On-Box Software Arbitrary File Overwrite Vulnerability2020-05-06csaf · cisco_csafUS
A vulnerability in Cisco Firepower Device Manager (FDM) On-Box software could allow an authenticated, remote attacker to overwrite arbitrary files on the underlying operating system of an affected device. The vulnerability is due to improper input validation. An attacker could exploit this vulnerability by uploading a malicious file to an affected device. A successful exploit could allow the attacker to overwrite arbitrary files on as well as modify the underlying operating system of an affected device. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisco_csaf NVD CVE.org MITRE

published 2020-05-06modified 2026-06-17

related (16,128)

Related entries.

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+16123 more

references (6)

External citations — patches, advisories, analysis.

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