What is CVE-2016-6808?

CVE-2016-6808 is a critical-severity vulnerability in Apache Tomcat Jk Connector, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2017-04-12.

How severe is CVE-2016-6808?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2016-6808 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Apache Tomcat Jk Connector

CVE-2016-6808

Buffer overflow in Apache Tomcat Connectors (mod_jk) before 1.2.42.

Vulnerability class: Buffer Overflow

Published 2017-04-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.227 (97.7th percentile), scored 2026-10-22.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.227 · newest: 0.227 · change: 0.000

Affected products

Apache Tomcat Jk Connector

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

www.securitytracker.com/id/1036969 (VDB Entry, Third Party Advisory, vdb-entry)
seclists.org/fulldisclosure/2016/Oct/44 (mailing-list, Mailing List, Third Party Advisory)
access.redhat.com/errata/RHSA-2017:0194 (vendor-advisory, Third Party Advisory)
www.securityfocus.com/bid/93429 (VDB Entry, Third Party Advisory, vdb-entry)
access.redhat.com/errata/RHSA-2017:0193 (vendor-advisory, Third Party Advisory)
rhn.redhat.com/errata/RHSA-2016-2957.html (vendor-advisory, Third Party Advisory)
tomcat.apache.org/security-jk.html (Vendor Advisory)
packetstormsecurity.com/files/139071/Apache-Tomcat-JK-ISAPI-Connector-1.2.41-Bu… (Exploit, VDB Entry, Third Party Advisory, Mitigation)
www.openwall.com/lists/oss-security/2016/10/06/4 (mailing-list, Mailing List, Third Party Advisory)
lists.apache.org/thread.html/ba661b0edd913b39ff129a32d855620dd861883ade05fd88a8… (mailing-list)

Frequently asked questions

What is CVE-2016-6808?: CVE-2016-6808 is a critical-severity vulnerability in Apache Tomcat Jk Connector, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2017-04-12.
How severe is CVE-2016-6808?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2016-6808 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.