CVE-2016-5309

Exp

The RAR file parser component in the AntiVirus Decomposer engine in Symantec Advanced Threat Protection: Network (ATP); Symantec Email Security.Cloud; Symantec Data Center Security: Server; Symantec Endpoint Protection (SEP) for Windows before 12.1.6 MP5; Symantec Endpoint Protection (SEP) for Mac; Symantec Endpoint Protection (SEP) for Linux before 12.1.6 MP6; Symantec Endpoint Protection for Small Business Enterprise (SEP SBE/SEP.Cloud); Symantec Endpoint Protection Cloud (SEPC) for Windows/Mac; Symantec Endpoint Protection Small Business Edition 12.1; CSAPI before 10.0.4 HF02; Symantec Protection Engine (SPE) before 7.0.5 HF02, 7.5.x before 7.5.4 HF02, 7.5.5 before 7.5.5 HF01, and 7.8.x before 7.8.0 HF03; Symantec Mail Security for Domino (SMSDOM) before 8.0.9 HF2.1, 8.1.x before 8.1.2 HF2.3, and 8.1.3 before 8.1.3 HF2.2; Symantec Mail Security for Microsoft Exchange (SMSMSE) before 6.5.8_3968140 HF2.3, 7.x before 7.0_3966002 HF2.1, and 7.5.x before 7.5_3966008 VHF2.2; Symantec Protection for SharePoint Servers (SPSS) before SPSS_6.0.3_To_6.0.5_HF_2.5 update, 6.0.6 before 6.0.6 HF_2.6, and 6.0.7 before 6.0.7_HF_2.7; Symantec Messaging Gateway (SMG) before 10.6.2; Symantec Messaging Gateway for Service Providers (SMG-SP) before 10.5 patch 260 and 10.6 before patch 259; Symantec Web Gateway; and Symantec Web Security.Cloud allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted RAR file that is mishandled during decompression.

Published: 2017-04-14 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-5309 is rated High Exploit Risk (68.5/100): CVSS Medium severity, with high exploitation likelihood (EPSS 6.88%, 93th percentile). 3 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2016-5309

EDB-ID Source Kind Published Link
40405 exploit_db edb 2016-09-21 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2016-5309

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 8.03% 6.88% -1.15%
2 2025-09-20 7.71% 8.03% +0.32%
3 2025-08-28 — 7.71% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-5309

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2016-5309

Affected software / configurations for CVE-2016-5309

Vendor Product Version Raw CPE
broadcom symantec_data_center_security_server — cpe:2.3:a:broadcom:symantec_data_center_security_server:-:*:*:*:*:*:*:*
symantec advanced_threat_protection — cpe:2.3:a:symantec:advanced_threat_protection:-:*:*:*:*:*:*:*
symantec csapi <= 10.0.4 cpe:2.3:a:symantec:csapi:*:*:*:*:*:*:*:*
symantec email_security.cloud — cpe:2.3:a:symantec:email_security.cloud:-:*:*:*:*:*:*:*
symantec endpoint_protection <= 12.1.4 cpe:2.3:a:symantec:endpoint_protection:*:*:*:*:*:mac:*:*
symantec endpoint_protection <= 12.1.6 cpe:2.3:a:symantec:endpoint_protection:*:*:*:*:*:linux:*:*
symantec endpoint_protection <= 12.1.6 cpe:2.3:a:symantec:endpoint_protection:*:*:*:*:*:windows:*:*
symantec endpoint_protection_cloud — cpe:2.3:a:symantec:endpoint_protection_cloud:-:*:*:*:*:mac:*:*
symantec endpoint_protection_cloud — cpe:2.3:a:symantec:endpoint_protection_cloud:-:*:*:*:*:windows:*:*
symantec endpoint_protection_for_small_business <= 12.1 cpe:2.3:a:symantec:endpoint_protection_for_small_business:*:*:*:*:*:*:*:*
symantec endpoint_protection_for_small_business — cpe:2.3:a:symantec:endpoint_protection_for_small_business:-:*:*:*:enterprise:*:*:*
symantec mail_security_for_domino <= 8.0.9 cpe:2.3:a:symantec:mail_security_for_domino:*:*:*:*:*:*:*:*
symantec mail_security_for_domino 8.1.2 cpe:2.3:a:symantec:mail_security_for_domino:8.1.2:*:*:*:*:*:*:*
symantec mail_security_for_domino 8.1.3 cpe:2.3:a:symantec:mail_security_for_domino:8.1.3:*:*:*:*:*:*:*
symantec mail_security_for_microsoft_exchange <= 6.5.8 cpe:2.3:a:symantec:mail_security_for_microsoft_exchange:*:*:*:*:*:*:*:*
symantec mail_security_for_microsoft_exchange 7.0 cpe:2.3:a:symantec:mail_security_for_microsoft_exchange:7.0:*:*:*:*:*:*:*
symantec mail_security_for_microsoft_exchange 7.0.1 cpe:2.3:a:symantec:mail_security_for_microsoft_exchange:7.0.1:*:*:*:*:*:*:*
symantec mail_security_for_microsoft_exchange 7.0.2 cpe:2.3:a:symantec:mail_security_for_microsoft_exchange:7.0.2:*:*:*:*:*:*:*
symantec mail_security_for_microsoft_exchange 7.0.3 cpe:2.3:a:symantec:mail_security_for_microsoft_exchange:7.0.3:*:*:*:*:*:*:*
symantec mail_security_for_microsoft_exchange 7.0.4 cpe:2.3:a:symantec:mail_security_for_microsoft_exchange:7.0.4:*:*:*:*:*:*:*
symantec mail_security_for_microsoft_exchange 7.5 cpe:2.3:a:symantec:mail_security_for_microsoft_exchange:7.5:*:*:*:*:*:*:*
symantec mail_security_for_microsoft_exchange 7.5.1 cpe:2.3:a:symantec:mail_security_for_microsoft_exchange:7.5.1:*:*:*:*:*:*:*
symantec mail_security_for_microsoft_exchange 7.5.2 cpe:2.3:a:symantec:mail_security_for_microsoft_exchange:7.5.2:*:*:*:*:*:*:*
symantec mail_security_for_microsoft_exchange 7.5.3 cpe:2.3:a:symantec:mail_security_for_microsoft_exchange:7.5.3:*:*:*:*:*:*:*
symantec mail_security_for_microsoft_exchange 7.5.4 cpe:2.3:a:symantec:mail_security_for_microsoft_exchange:7.5.4:*:*:*:*:*:*:*
symantec messaging_gateway <= 10.6.1 cpe:2.3:a:symantec:messaging_gateway:*:*:*:*:*:*:*:*
symantec messaging_gateway_for_service_providers 10.5 cpe:2.3:a:symantec:messaging_gateway_for_service_providers:10.5:*:*:*:*:*:*:*
symantec messaging_gateway_for_service_providers 10.6 cpe:2.3:a:symantec:messaging_gateway_for_service_providers:10.6:*:*:*:*:*:*:*
symantec protection_engine <= 7.0.5 cpe:2.3:a:symantec:protection_engine:*:*:*:*:*:*:*:*
symantec protection_engine 7.5.0 cpe:2.3:a:symantec:protection_engine:7.5.0:*:*:*:*:*:*:*
symantec protection_engine 7.5.1 cpe:2.3:a:symantec:protection_engine:7.5.1:*:*:*:*:*:*:*
symantec protection_engine 7.5.2 cpe:2.3:a:symantec:protection_engine:7.5.2:*:*:*:*:*:*:*
symantec protection_engine 7.5.3 cpe:2.3:a:symantec:protection_engine:7.5.3:*:*:*:*:*:*:*
symantec protection_engine 7.5.4 cpe:2.3:a:symantec:protection_engine:7.5.4:*:*:*:*:*:*:*
symantec protection_engine 7.5.5 cpe:2.3:a:symantec:protection_engine:7.5.5:*:*:*:*:*:*:*
symantec protection_engine 7.8.0 cpe:2.3:a:symantec:protection_engine:7.8.0:*:*:*:*:*:*:*
symantec protection_for_sharepoint_servers 6.0.3 cpe:2.3:a:symantec:protection_for_sharepoint_servers:6.0.3:*:*:*:*:*:*:*
symantec protection_for_sharepoint_servers 6.0.4 cpe:2.3:a:symantec:protection_for_sharepoint_servers:6.0.4:*:*:*:*:*:*:*
symantec protection_for_sharepoint_servers 6.0.5 cpe:2.3:a:symantec:protection_for_sharepoint_servers:6.0.5:*:*:*:*:*:*:*
symantec protection_for_sharepoint_servers 6.0.6 cpe:2.3:a:symantec:protection_for_sharepoint_servers:6.0.6:*:*:*:*:*:*:*
symantec protection_for_sharepoint_servers 6.0.7 cpe:2.3:a:symantec:protection_for_sharepoint_servers:6.0.7:*:*:*:*:*:*:*
symantec web_gateway — cpe:2.3:a:symantec:web_gateway:-:*:*:*:*:*:*:*
symantec web_security.cloud — cpe:2.3:a:symantec:web_security.cloud:-:*:*:*:*:*:*:*

References for CVE-2016-5309

cvelogic Threat Intelligence