CVE-2021-34762Network attack vector

Arbitrary file read and write via HTTPS traversal

Published Oct 27, 2021 · Updated Nov 7, 2024

Path traversal in Cisco Firepower Management Center Software allows remote authenticated users to read or write arbitrary files. The web-based management interface fails to validate traversal sequences in crafted HTTPS URLs before using the requested path for file access. Valid device credentials are required, and the default configuration is exposed; successful requests can disclose or alter appliance files without directly interrupting service.

CVSS severity8.1
High
EPSS probability1.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Path traversal in Cisco Firepower Management Center Software allows remote authenticated users to read or write arbitrary files. The web-based management interface fails to validate traversal sequences in crafted HTTPS URLs before using the requested path for file access. Valid device credentials are required, and the default configuration is exposed; successful requests can disclose or alter appliance files without directly interrupting service.

The record

CVE
CVE-2021-34762
Published
Oct 27, 2021
Updated
Nov 7, 2024
Vendor
ClamAV
Product
Cisco Firepower Management Center
Classifications
CWE-26, CWE-22, T1565.001, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 27, 2021CVE publishedPublication date reported by the CVE source.
  2. Nov 7, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco Firepower Management Centerversion=n/a

Published CVSS scores

5.5NIST National Vulnerability DatabaseAV:N/AC:L/Au:S/C:P/I:P/A:N
8.1Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:X/RL:X/RC:X

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-26Path Traversal: '/dir/../filename'
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1565.001Stored Data Manipulation
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo