ExploitedNot in CISA KEV yet

CVE-2016-5312

Exploitation confirmed. First attested on 2026-08-15 by GCVE · kevintel, GCVE · shadowserver.

Published2017-04-14
WeaknessCWE-22

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Directory traversal vulnerability in the charting component in Symantec Messaging Gateway before 10.6.2 allows remote authenticated users to read arbitrary files via a .. (dot dot) in the sn parameter to brightmail/servlet/com.ve.kavachart.servlet.ChartStream.

Timeline

dates in UTC

2017-04-1418:59CVE publishedNVD
2026-08-15Listed as exploited by GCVEGCVE
2026-08-15Exploitation first reportedGCVE
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-5312?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-5312?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Symantec messaging gateway

Branch	Affected	Fixed in	Source
10.6	≤ 10.6.1	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

www.symantec.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

GCVEexploitation2026-08-15
NVDCVSS 3.06.5read 2026-10-23
NVDCVSS 2.04read 2026-10-23
NVDweakness (CWE)CWE-22read 2026-10-23
FIRST EPSSEPSS score54.0 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Published: 2017-04-14
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2016-5312?

Is CVE-2016-5312 actively exploited?

Active exploitation of CVE-2016-5312 has not been confirmed. Its EPSS score was 54.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2016-5312?

CVE-2016-5312 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

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