Which products and versions are affected by CVE-2016-3645?

Affected: Advanced Threat Protection (Symantec); Csapi (Symantec); Data Center Security Server (Symantec) versions 6.0, 6.0-mp1, 6.5, 6.5-mp1, 6.6, 6.6-mp1, among others. The full list is in the CVE brief.

Is CVE-2016-3645 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2016-3645 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2016-3645?

Public exploit code is available.

Is there a fix for CVE-2016-3645?

Fixed versions are available, including Advanced Threat Protection 2.0.3, Csapi 10.0.4, Mail Security For Domino 8.0.9.

How urgently should CVE-2016-3645 be patched?

Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

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WatchlistCritical

CVE-2016-3645Advanced Threat Protection Vulnerability

Published Jun 30, 2016 · Updated May 6, 2026

Key Facts

Patch immediately

CVE-2016-3645 is a critical-severity vulnerability (CVSS 9.8 v3) affecting Advanced Threat Protection (Symantec), Csapi (Symantec), Data Center Security Server (Symantec) and 15 more products.
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 25% probability of exploitation in the next 30 days.
Fixed versions are available, including Advanced Threat Protection 2.0.3, Csapi 10.0.4, Mail Security For Domino 8.0.9.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Scores

CVSS v3

9.8

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

25%

Higher than 97.8% of all scored CVEs

Exploit maturity

Proof of concept

ATLAS score

43/100

Publication score, see How it works

Exploitation Verdict

KEV listed

Not listed

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Proof of concept

Public exploit code

Proof-of-concept links

In-the-wild evidence

Reports of active use

Advisories And Exploit References

advisory40035
advisoryhttps://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=&suid=20160628_00
advisory91439
advisory1036198
advisory1036199

Description

Integer overflow in the TNEF unpacker in the AntiVirus Decomposer engine in Symantec Advanced Threat Protection (ATP); Symantec Data Center Security:Server (SDCS:S) 6.x through 6.6 MP1; Symantec Web Gateway; Symantec Endpoint Protection (SEP) before 12.1 RU6 MP5; Symantec Endpoint Protection (SEP) for Mac; Symantec Endpoint Protection (SEP) for Linux before 12.1 RU6 MP5; Symantec Protection Engine (SPE) before 7.0.5 HF01, 7.5.x before 7.5.3 HF03, 7.5.4 before HF01, and 7.8.0 before HF01; Symantec Protection for SharePoint Servers (SPSS) 6.0.3 through 6.0.5 before 6.0.5 HF 1.5 and 6.0.6 before HF 1.6; Symantec Mail Security for Microsoft Exchange (SMSMSE) before 7.0_3966002 HF1.1 and 7.5.x before 7.5_3966008 VHF1.2; Symantec Mail Security for Domino (SMSDOM) before 8.0.9 HF1.1 and 8.1.x before 8.1.3 HF1.2; CSAPI before 10.0.4 HF01; Symantec Message Gateway (SMG) before 10.6.1-4; Symantec Message Gateway for Service Providers (SMG-SP) 10.5 before patch 254 and 10.6 before patch 253; Norton AntiVirus, Norton Security, Norton Internet Security, and Norton 360 before NGC 22.7; Norton Security for Mac before 13.0.2; Norton Power Eraser (NPE) before 5.1; and Norton Bootable Removal Tool (NBRT) before 2016.1 allows remote attackers to have an unspecified impact via crafted TNEF data.

Affected Products

33 affected entries in total

Product	Affected versions	Fixed in
Advanced Threat ProtectionSymantec	See advisory	2.0.3
CsapiSymantec	See advisory	10.0.4
Data Center Security ServerSymantec	6.0, 6.0-mp1, 6.5, 6.5-mp1, 6.6, 6.6-mp1	n/a
Endpoint ProtectionSymantec	12.1.6, 12.1.6-mp1, 12.1.6-mp2, 12.1.6-mp3, 12.1.6-mp4	n/a
Mail Security For DominoSymantec	See advisory	8.0.9

13 more affected products in the full CVE brief

Patched Releases

Advanced Threat Protection

2.0.3

Csapi

10.0.4

Mail Security For Domino

8.0.9

Mail Security For Microsoft Exchange

7.0.4

Message Gateway

10.6.1-3

Ngc

22.6

Norton Bootable Removal Tool

2016.0

Norton Power Eraser

5.0

Norton Security

13.0.1

Protection Engine

7.0.5

Protection For Sharepoint Servers

6.0.6

Timeline

Publicly disclosed
Jun 30, 2016
Last updated
May 6, 2026

Weakness Type

CWE-189

References

advisory40035
advisorysymantec.com · securityupdates
advisory91439
advisory1036198
advisory1036199

1 more references in the full CVE brief

FAQ

Common Questions.

Integer overflow in the TNEF unpacker in the AntiVirus Decomposer engine in Symantec Advanced Threat Protection (ATP); Symantec Data Center Security:Server (SDCS:S) 6.x through 6.6 MP1; Symantec Web Gateway; Symantec Endpoint Protection (SEP) before 12.1 RU6 MP5; Symantec Endpoint Protection (SEP) for Mac; Symantec En…
Affected: Advanced Threat Protection (Symantec); Csapi (Symantec); Data Center Security Server (Symantec) versions 6.0, 6.0-mp1, 6.5, 6.5-mp1, 6.6, 6.6-mp1, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Advanced Threat Protection 2.0.3, Csapi 10.0.4, Mail Security For Domino 8.0.9.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Is CVE-2016-3645 On Your Attack Surface?

Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.