HOMEVULNERABILITIESCVE-2016-3976
HIGHCISA KEVIN THE WILD

CVE-2016-3976

Published: November 3, 2021

EPSS:81.47%probability of exploitation in 30 daysPercentile:99.2th

Official Description

SAP NetWeaver Application Server Java Platforms contains a directory traversal vulnerability via a ..\ (dot dot backslash) in the fileName parameter to CrashFileDownloadServlet. This allows remote attackers to read files.

NVD Source

CISA KEV Advisory

SAP NetWeaver Directory Traversal Vulnerability

SAP NetWeaver Application Server Java Platforms contains a directory traversal vulnerability via a ..\ (dot dot backslash) in the fileName parameter to CrashFileDownloadServlet. This allows remote attackers to read files.

Added to KEV: 2021-11-03Federal patch deadline: 2022-05-03
Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

SAP NetWeaver Application Server Java Platforms are vulnerable to a directory traversal flaw via the CrashFileDownloadServlet, allowing remote attackers to read arbitrary files. The high EPSS score of 0.81466 indicates a very high likelihood of exploitation, and its presence in CISA's KEV catalog confirms active exploitation.

Active exploitation of this vulnerability has been observed in the wild, posing a significant risk to SAP NetWeaver installations. It is remotely exploitable.

Recommended Action

Apply the latest security updates for SAP NetWeaver Application Server Java Platforms to mitigate this directory traversal vulnerability. Implement strict input validation for file-related operations.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2016-3976 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2016-3976 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.

Affected Vendors & Products

Mentioned vendors (from description):
SAPJava
CPE data not yet available in NVD for this CVE.

Exploit & PoC Resources

ACTIVE EXPLOITATIONConfirmed exploitation in the wild
External links open in a new tab. Always verify in a controlled environment before use.

All References (1)

Quick Facts

CVE IDCVE-2016-3976
SeverityHIGH
CISA KEVYES — Active Exploitation
ExploitIN THE WILD
EPSS (30d)81.47%
PublishedNov 3, 2021

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2016-3976 in threat intel feeds
  • Review IDS/IPS signatures for exploitation attempts
  • !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
  • !Active exploitation confirmed — treat as P1
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.