Vulnerability Report

CVE-2016-0856

Title: Advantech Webaccess RCE

Memory Corruption

Proof Of Concept

PoC Available for CVE-2016-0856

CWE Category CWE-119

Published Date Jan 15, 2016

Modified Date Jun 17, 2026

Exploit Status Available

Score 9.8 CVSS v3.0

Exploit Probability (EPSS)

16.65%

Vulnerability Summary

CVE-2016-0856: Multiple stack-based buffer overflows in Advantech WebAccess before 8.1 allow remote attackers to execute arbitrary code via unspecified vectors.

Impacted Vendors

broadwin 1

zarafa 1

advantech 1

Reference Links

http://www.zerodayinitiative.com/advisories/ZDI-16-100 http://www.zerodayinitiative.com/advisories/ZDI-16-101 http://www.zerodayinitiative.com/advisories/ZDI-16-102 http://www.zerodayinitiative.com/advisories/ZDI-16-103 http://www.zerodayinitiative.com/advisories/ZDI-16-106 http://www.zerodayinitiative.com/advisories/ZDI-16-108 http://www.zerodayinitiative.com/advisories/ZDI-16-109 http://www.zerodayinitiative.com/advisories/ZDI-16-110 http://www.zerodayinitiative.com/advisories/ZDI-16-111 http://www.zerodayinitiative.com/advisories/ZDI-16-112 http://www.zerodayinitiative.com/advisories/ZDI-16-113 http://www.zerodayinitiative.com/advisories/ZDI-16-114 http://www.zerodayinitiative.com/advisories/ZDI-16-115 http://www.zerodayinitiative.com/advisories/ZDI-16-116 http://www.zerodayinitiative.com/advisories/ZDI-16-117 http://www.zerodayinitiative.com/advisories/ZDI-16-118 http://www.zerodayinitiative.com/advisories/ZDI-16-120 https://ics-cert.us-cert.gov/advisories/ICSA-16-014-01 http://www.zerodayinitiative.com/advisories/ZDI-16-100 http://www.zerodayinitiative.com/advisories/ZDI-16-101 http://www.zerodayinitiative.com/advisories/ZDI-16-102 http://www.zerodayinitiative.com/advisories/ZDI-16-103 http://www.zerodayinitiative.com/advisories/ZDI-16-106 http://www.zerodayinitiative.com/advisories/ZDI-16-108 http://www.zerodayinitiative.com/advisories/ZDI-16-109 http://www.zerodayinitiative.com/advisories/ZDI-16-110 http://www.zerodayinitiative.com/advisories/ZDI-16-111 http://www.zerodayinitiative.com/advisories/ZDI-16-112 http://www.zerodayinitiative.com/advisories/ZDI-16-113 http://www.zerodayinitiative.com/advisories/ZDI-16-114 http://www.zerodayinitiative.com/advisories/ZDI-16-115 http://www.zerodayinitiative.com/advisories/ZDI-16-116 http://www.zerodayinitiative.com/advisories/ZDI-16-117 http://www.zerodayinitiative.com/advisories/ZDI-16-118 http://www.zerodayinitiative.com/advisories/ZDI-16-120 https://ics-cert.us-cert.gov/advisories/ICSA-16-014-01

CVSS v3.0

Source Entity [email protected]

Severity CRITICAL

9.8

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

CVSS v2.0

Source Entity [email protected]

Severity HIGH

10.0

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:L/Au:N/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2016-0856 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/thezdi/PoC

View Code

GitHub https://github.com/readloud/PoC

View Code

June 17, 2026 MODIFIED

Vulnerability data updated via NVD.

May 06, 2026 MODIFIED

Vulnerability data updated via NVD.

April 12, 2025 MODIFIED

Vulnerability data or affected products updated.

January 15, 2016 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.