CVE-2025-20206

highpriority · track · 31EPSS 0.002 · 7 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.18% (7th) EPSS

CVSS 7.8 · high

Is it mine?

47 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

A vulnerability in the interprocess communication (IPC) channel of Cisco Secure Client for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack on an affected device if the Secure Firewall Posture Engine, formerly HostScan, is installed on Cisco Secure Client. This vulnerability is due to insufficient validation of resources that are loaded by the application at run time. An attacker could exploit this vulnerability by sending a crafted IPC message to a specific Cisco Secure Client process. A successful exploit could allow the attacker to execute arbitrary code on the affected machine with SYSTEM privileges. To exploit this vulnerability, the attacker must have valid user credentials on the Windows system.

remediations

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

A vendor fix is available.

FixedCisco Secure Clientcisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

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

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.17.1highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nsecondary · psirt@cisco.com USexploitability 1.8 · impact 5.2

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.17.1highCVSS:3.1/AV:L/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-347USCWE-347US

affected products (47)

Products and version ranges known to be affected.

Cisco Secure Client for Windows <5.1.8.105all versionscert_bundDE
Cisco Secure Client≤ for Windows <5.1.8.105cert_bundDE
Cisco Cisco Secure Clientall versionscisco_csafUS
Cisco Cisco Secure Client≤ 4.10.05111enisa_euvdEU
Cisco Cisco Secure Client≤ 5.1.2.42enisa_euvdEU
Cisco Cisco Secure Client≤ 4.9.04043enisa_euvdEU
Cisco Cisco Secure Client≤ 4.10.04071enisa_euvdEU
Cisco Cisco Secure Client≤ 5.0.03076enisa_euvdEU
Cisco Cisco Secure Client≤ 4.9.06037enisa_euvdEU
Cisco Cisco Secure Client≤ 4.9.01095enisa_euvdEU
Cisco Cisco Secure Client≤ 4.10.07061enisa_euvdEU
Cisco Cisco Secure Client≤ 4.10.03104enisa_euvdEU
Cisco Cisco Secure Client≤ 5.1.0.136enisa_euvdEU
Cisco Cisco Secure Client≤ 5.1.3.62enisa_euvdEU
Cisco Cisco Secure Client≤ 4.10.08029enisa_euvdEU
Cisco Cisco Secure Client≤ 4.10.07062enisa_euvdEU
Cisco Cisco Secure Client≤ 5.0.02075enisa_euvdEU
Cisco Cisco Secure Client≤ 5.0.03072enisa_euvdEU
Cisco Cisco Secure Client≤ 4.9.03047enisa_euvdEU
Cisco Cisco Secure Client≤ 4.9.03049enisa_euvdEU

showing 20 of 47

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-0490Cisco Secure Client: Schwachstelle ermöglicht Ausführen von beliebigem ProgrammcodeDeutsch2025-03-05csaf · cert_bundDE
Ein lokaler Angreifer kann eine Schwachstelle in Cisco Secure Client ausnutzen, um beliebigen Programmcode mit System-Rechten auszuführen.
cisco-sa-secure-dll-injection-AOyzEqSgCisco Secure Client for Windows with Secure Firewall Posture Engine DLL Hijacking Vulnerability2025-03-05csaf · cisco_csafUS
A vulnerability in the interprocess communication (IPC) channel of Cisco Secure Client for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack on an affected device if the Secure Firewall Posture Engine, formerly HostScan, is installed on Cisco Secure Client. This vulnerability is due to insufficient validation of resources that are loaded by the application at run time. An attacker could exploit this vulnerability by sending a crafted IPC message to a specific Cisco Secure Client process. A successful exploit could allow the attacker to execute arbitrary code on the affected machine with SYSTEM privileges. To exploit this vulnerability, the attacker must have valid user credentials on the Windows system. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund cisco_csaf NVD CVE.org MITRE

published 2025-03-05modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

scry

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