CVE-2021-34762

mediumpriority · track · 33EPSS 0.020 · 80 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.99% (80th) EPSS

CVSS 5.5 · medium

Is it mine?

65 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cisco_csaf

EPSS · scored 2026-10-26

A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an authenticated, remote attacker to perform a directory traversal attack on an affected device. The attacker would require valid device credentials. The vulnerability is due to insufficient input validation of the HTTPS URL by the web-based management interface. An attacker could exploit this vulnerability by sending a crafted HTTPS request that contains directory traversal character sequences to an affected device. A successful exploit could allow the attacker to read or write arbitrary files on the device.

remediations

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

A vendor fix is available.

FixedCisco Secure Firewall Management Center (FMC) 6.2.3 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.1 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.10 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.11 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.12 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.13 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.14 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.15 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.16 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.17 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.2 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.3 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.4 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.5 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.6 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.7 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.8 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.2.3.9 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.4.0 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.4.0.1 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.4.0.10 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.4.0.11 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.4.0.12 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.4.0.2 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.4.0.3 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.4.0.4 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.4.0.5 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.4.0.6 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.4.0.7 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.4.0.8 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.4.0.9 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.6.0 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.6.0.1 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.6.1 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.6.3 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 6.6.4 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 7.0.0 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Secure Firewall Management Center (FMC) 7.0.0.1 when installed on Cisco Secure Firewall Management Center (FMC) Appliancescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

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

8.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.5–8.1

v2.05.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:Nprimary · NVD / NIST USexploitability 8 · impact 4.9

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 5.2

v3.18.1highAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nsecondary · psirt@cisco.com USexploitability 2.8 · impact 5.2

v3.17.4highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nsecondary · Cisco PSIRT US

ssvc

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

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22USprimaryCWE-22USCWE-26USCWE-26US

affected products (65)

Products and version ranges known to be affected.

showing 20 of 65

advisories (1)

Vendor and ecosystem advisories describing this.

cisco-sa-fmc-dir-traversal-95UyW5tkCisco Firepower Management Center Software Authenticated Directory Traversal Vulnerability2021-10-27csaf · cisco_csafUS
A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an authenticated, remote attacker to perform a directory traversal attack on an affected device. The attacker would require valid device credentials. The vulnerability is due to insufficient input validation of the HTTPS URL by the web-based management interface. An attacker could exploit this vulnerability by sending a crafted HTTPS request that contains directory traversal character sequences to an affected device. A successful exploit could allow the attacker to read or write arbitrary files on the device. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is part of the October 2021 release of the Cisco ASA, FTD, and FMC Security Advisory Bundled publication. For a complete list of the advisories and links to them, see Cisco Event Response: October 2021 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74773"].

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 2021-10-27modified 2026-08-11

related (12,513)

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GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.7 before 18.11.12, 19.0 before 19.0.9, 19.1 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2…
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+12508 more

references (6)

External citations — patches, advisories, analysis.

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