CVE-2006-6477

FRAgent.exe in Mandiant First Response (MFR) before 1.1.1, when run in daemon mode and configured to use only HTTP, allows local users to modify requests and responses between a client and an agent by hijacking an HTTP FRAgent daemon and conducting a man-in-the-middle (MITM) attack.

Published: 2006-12-20 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-6477 is rated Low Risk (15.4/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.25%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2006-6477

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.07% 0.25% +0.18%
2 2025-03-17 0.04% 0.07% +0.02%
3 2023-03-07 — 0.04% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-6477

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
2.4 2.0 LOW
AV:L/AC:H/Au:S/C:N/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 1.5 4.9 [email protected]

Weakness enumeration for CVE-2006-6477

OS Trackers for CVE-2006-6477

vendor priority summary link
alpine — CVE-2006-6477: no source package rows; 0 state rows across 0 repos (none); fixed 0, open 0. https://security.alpinelinux.org/vuln/CVE-2006-6477

NVD evaluator notes for CVE-2006-6477

Solution: Sucessful exploitation requires that the affected products are run in daemon mode and configured to use only HTTP. This vulnerability is addressed in the following product release: Mandiant, First Response, 1.1.1

Affected software / configurations for CVE-2006-6477

Vendor Product Version Raw CPE
mandiant first_response <= 1.1 cpe:2.3:a:mandiant:first_response:*:*:*:*:*:*:*:*

References for CVE-2006-6477

cvelogic Threat Intelligence