CVE-2018-25304Public exploit

Arbitrary code execution via oversized Location header

Published Apr 29, 2026 · Updated Apr 29, 2026

Buffer overflow in Free Download Manager 2.0 Build 417 allows local users to execute arbitrary code through a crafted URL import. The URL import routine accepts an oversized HTTP Location header from the referenced server and overwrites the structured exception handler chain. Exploitation requires the URL file to be imported through the application's download-list import menu and runs code with the invoking user's privileges.

CVSS severity8.6
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Free Download Manager 2.0 Build 417 allows local users to execute arbitrary code through a crafted URL import. The URL import routine accepts an oversized HTTP Location header from the referenced server and overwrites the structured exception handler chain. Exploitation requires the URL file to be imported through the application's download-list import menu and runs code with the invoking user's privileges.

The record

CVE
CVE-2018-25304
Published
Apr 29, 2026
Updated
Apr 29, 2026
Vendor
FreeDownloadManager.ORG
Product
Free Download Manager
Classifications
CWE-120, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=2.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

FreeDownloadManager.ORG · Free Download Managerversion=2.0

Published CVSS scores

8.4VulnCheckCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.6VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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.

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No observations available

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

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1203Exploitation for Client Execution

Public exploit references

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

Technologies

Your stack

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Your stack

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