CVE-2016-6809

Apache Tika before 1.14 allows Java code execution for serialized objects embedded in MATLAB files. The issue exists because Tika invokes JMatIO to do native deserialization.

Published: 2017-04-06 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-6809 is rated High Risk (73.2/100): CVSS Critical severity, with high exploitation likelihood (EPSS 8.09%, 94th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +1.04% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2016-6809

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 7.05% 8.09% +1.04%
2 2025-12-08 9.27% 7.05% -2.23%
3 2025-03-30 — 9.27% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-6809

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2016-6809

GitHub Security Advisory for CVE-2016-6809

GHSA-j8g6-2wh7-6439 · Severity: critical · Ecosystem: maven — Apache Tika allows Java code execution for serialized objects embedded in MATLAB files

OS Trackers for CVE-2016-6809

vendor priority summary link
debian not yet assigned CVE-2016-6809 not yet assigned priority: Debian including 1 source packages (tika), 2 status rows across 2 suites (bullseye, sid): resolved 2. https://security-tracker.debian.org/tracker/CVE-2016-6809
redhat medium — https://access.redhat.com/security/cve/CVE-2016-6809
ubuntu medium CVE-2016-6809 medium priority: Ubuntu including 1 source packages (tika), 5 status rows across 5 suites (precise, trusty, upstream, xenial, yakkety): DNE 2, not-affected 2, released 1. https://ubuntu.com/security/CVE-2016-6809

Affected software / configurations for CVE-2016-6809

Vendor Product Version Raw CPE
apache nutch 2.3.1 cpe:2.3:a:apache:nutch:2.3.1:*:*:*:*:*:*:*
apache tika <= 1.13 cpe:2.3:a:apache:tika:*:*:*:*:*:*:*:*

References for CVE-2016-6809

URL Tags
http://seclists.org/bugtraq/2016/Nov/40 Mailing List Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/94247 Third Party Advisory VDB Entry
https://dist.apache.org/repos/dist/release/tika/CHANGES-1.14.txt Release Notes Vendor Advisory
https://lists.apache.org/thread.html/91eb639ef619b9a26b40020ca6732e7dbe457f7322ed5f1df49e411a%40%3Cdev.nutch.apache.org%3E
https://lists.apache.org/thread.html/d2375da29d89e679abf5d845db76d6f798fdc6f7d44f2c788e8a0fb9%40%3Cuser.nutch.apache.org%3E
https://lists.apache.org/thread.html/e414754a6c57ce7194b731e211cd6b2cbb41f2c7000e3fb9c6b6ec78%40%3Cdev.lucene.apache.org%3E
https://lists.apache.org/thread.html/r2f6f6c130b12b7332f323f74d031072b1517065ce28a22346791ffb6%40%3Cissues.lucene.apache.org%3E
https://lists.apache.org/thread.html/rfd3646bb724b66b1a9ddef69e692da2b7a727a8799551c78eedf0a0f%40%3Cissues.lucene.apache.org%3E
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