What is CVE-2016-2977?

CVE-2016-2977 is a medium-severity vulnerability in IBM Sametime, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2017-08-29.

How severe is CVE-2016-2977?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Improper input validation in IBM Sametime

CVE-2016-2977

IBM Sametime Meeting Server 8.5.2 and 9.0 could allow a malicious user to lower other users hands in the meeting. IBM X-Force ID: 113937.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2017-08-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (59.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

IBM Sametime — versions 8.5.2, 9.0.0.0, 9.0.1

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.securityfocus.com/bid/100599 (vdb-entry)
www.securitytracker.com/id/1039231 (VDB Entry, Third Party Advisory, vdb-entry)
www.ibm.com/support/docview.wss (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/113937 (VDB Entry, Vendor Advisory)

Frequently asked questions

What is CVE-2016-2977?: CVE-2016-2977 is a medium-severity vulnerability in IBM Sametime, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2017-08-29.
How severe is CVE-2016-2977?: Medium severity. CVSS v3 base score is 4.3 out of 10.