CVE-2018-25218Public exploit

Local code execution via registration-field SEH overwrite

Published Mar 26, 2026 · Updated Mar 26, 2026

A stack buffer overflow in PassFab for RAR 9.3.2 allows local users to execute arbitrary code through crafted registration data. Oversized Licensed E-mail and Registration Code input crosses a 260-byte stack-buffer boundary and overwrites NSEH and SEH; a pop-pop-return sequence in SoftwareLog.dll redirects execution to payload shellcode. An attacker must paste the payload into the local registration dialog and click Register; the published exploit launches arbitrary Windows commands.

CVSS severity8.6
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A stack buffer overflow in PassFab for RAR 9.3.2 allows local users to execute arbitrary code through crafted registration data. Oversized Licensed E-mail and Registration Code input crosses a 260-byte stack-buffer boundary and overwrites NSEH and SEH; a pop-pop-return sequence in SoftwareLog.dll redirects execution to payload shellcode. An attacker must paste the payload into the local registration dialog and click Register; the published exploit launches arbitrary Windows commands.

The record

CVE
CVE-2018-25218
Published
Mar 26, 2026
Updated
Mar 26, 2026
Vendor
PassFab
Product
PassFab for RAR
Classifications
CWE-787, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 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=9.3.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

PassFab · PassFab for RARversion=9.3.2

Published CVSS scores

8.4VulnCheckCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/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-787Out-of-bounds Write
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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