CVE-2006-4855

CVE-2006-4855 is a medium-severity vulnerability in Symantec Client Security with a CVSS 2.0 base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

• Severity: Medium (CVSS 2.0 base score 4.9)
• EPSS exploit prediction: 1% (67th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-399
• Affected product: Symantec Client Security
• Published: 2006-09-19
• Last modified: 2026-06-16

Description

The \Device\SymEvent driver in Symantec Norton Personal Firewall 2006 9.1.0.33, and other versions of Norton Personal Firewall, Internet Security, AntiVirus, SystemWorks, Symantec Client Security SCS 1.x, 2.x, 3.0, and 3.1, Symantec AntiVirus Corporate Edition SAVCE 8.x, 9.x, 10.0, and 10.1, Symantec pcAnywhere 11.5 only, and Symantec Host, allows local users to cause a denial of service (system crash) via invalid data, as demonstrated by calling DeviceIoControl to send the data.

Frequently asked questions

What is CVE-2006-4855?

The \Device\SymEvent driver in Symantec Norton Personal Firewall 2006 9.1.0.33, and other versions of Norton Personal Firewall, Internet Security, AntiVirus, SystemWorks, Symantec Client Security SCS 1.x, 2.x, 3.0, and 3.1, Symantec AntiVirus Corporate Edition SAVCE 8.x, 9.x, 10.0, and 10.1, Symantec pcAnywhere 11.5 only, and Symantec Host, allows local users to cause a denial of service (system crash) via invalid data, as demonstrated by calling DeviceIoControl to send the data.

How severe is CVE-2006-4855?

CVE-2006-4855 has a CVSS 2.0 base score of 4.9, rated medium severity.

Is CVE-2006-4855 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-4855?

CVE-2006-4855 primarily affects Symantec Client Security. In total, 101 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-4855?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2006-4855 published?

CVE-2006-4855 was published on 2006-09-19 and last updated on 2026-06-16.

References

• http://secunia.com/advisories/21938
• http://securityreason.com/securityalert/1591
• http://securityresponse.symantec.com/avcenter/security/Content/2006.09.20a.html
• http://securitytracker.com/id?1016889
• http://securitytracker.com/id?1016892
• http://securitytracker.com/id?1016893
• http://securitytracker.com/id?1016894
• http://securitytracker.com/id?1016895
• http://securitytracker.com/id?1016896
• http://securitytracker.com/id?1016897
• http://securitytracker.com/id?1016898
• http://www.matousec.com/info/advisories/Norton-Insufficient-validation-of-SymEvent-driver-input-buffer.php
• http://www.securityfocus.com/archive/1/446111/100/0/threaded
• http://www.securityfocus.com/bid/20051
• http://www.vupen.com/english/advisories/2006/3636
• https://exchange.xforce.ibmcloud.com/vulnerabilities/28960

Affected products (101)

• cpe:2.3:a:symantec:client_security:1.0:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.0.0_b8.01.9378:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.0.1_build_8.01.425a:mr1:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.0.1_build_8.01.429c:mr2:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.0.1_build_8.01.434:mr3:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.0.1_build_8.01.437:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.0.1_build_8.01.446:mr4:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.0.1_build_8.01.457:mr5:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.0.1_build_8.01.460:mr6:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.0.1_build_8.01.464:mr7:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.0.1_build_8.01.471:mr8:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.0.1_build_8.01.501:mr9:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.0_build_8.01.9374:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.1:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.1.1_build_393:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.1.1_mr1_build_8.1.1.314a:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.1.1_mr2_build_8.1.1.319:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.1.1_mr3_build_8.1.1.323:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.1.1_mr4_build_8.1.1.329:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.1.1_mr5_build_8.1.1.336:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.1.1_mr6_b8.1.1.266:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:1.1_stm_b8.1.0.825a:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:2.0:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:2.0.1_build_9.0.1.1000:mr1:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:2.0.2_build_9.0.2.1000:mr2:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:2.0.3_build_9.0.3.1000:mr3:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:2.0.5_build_1100:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:2.0_scf_7.1:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:2.0_stm_build_9.0.0.338:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:3.0:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:client_security:3.1:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:host_ids:*:*:*:*:*:*:*:*
• cpe:2.3:a:symantec:norton_antivirus:2.1:*:ms_exchange:*:*:*:*:*
• cpe:2.3:a:symantec:norton_antivirus:8.0:*:corporate:*:*:*:*:*
• cpe:2.3:a:symantec:norton_antivirus:8.0.1:*:corporate:*:*:*:*:*
• cpe:2.3:a:symantec:norton_antivirus:8.0.1.425a:*:corporate:*:*:*:*:*
• cpe:2.3:a:symantec:norton_antivirus:8.0.1.425c:*:corporate:*:*:*:*:*
• cpe:2.3:a:symantec:norton_antivirus:8.0.1.501:*:corporate:*:*:*:*:*

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