What it is
CVE-2016-5312 is a vulnerability affecting Symantec Messaging Gateway. Directory traversal vulnerability in the charting component in Symantec Messaging Gateway before 10.6.2 allows remote authenticated users to read...
Vulnerability report
Exploited in the wild
High confidence
Not in CISA KEV
CVE-2016-5312
Messaging Gateway Path Traversal
Symantec / Messaging Gateway
- Severity
- CVSS 6.5 · Medium
- Confidence
- High
- Exploit status
- Exploited in the wild
- EPSS
- 53.7%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is high.
Who is affected?
Symantec / Messaging Gateway.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
Messaging Gateway Path Traversal
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.
- Published
- 14 Apr 2017
- Exploitation Reported
- 15 Aug 2026
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
CVE References
- 40437 exploit-db.com · Exploit https://www.exploit-db.com/exploits/40437/
- 93148 securityfocus.com · VDB Entry http://www.securityfocus.com/bid/93148
- 1036908 securitytracker.com · VDB Entry http://www.securitytracker.com/id/1036908
- 20160928 Symantec Messaging Gateway <= 10.6.1 Directory Traversal seclists.org · Mailing List http://seclists.org/fulldisclosure/2016/Sep/71
- symantec.com/security_response/securityupdates/detail.jsp symantec.com · CVE Record http://www.symantec.com/security_response/securityupdates/detail.jsp?...
- packetstormsecurity.com/files/138891/Symantec-Messaging-Gateway-10.6... packetstormsecurity.com · CVE Record http://packetstormsecurity.com/files/138891/Symantec-Messaging-Gatewa...
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
The Shadowserver
Independent exploitation attestation added to the KEV Intelligence record.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| The Shadowserver First | 2026-08-15 00:00 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
No scanner integrations recorded yet.
Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Risk and context
Severity, weaknesses, and research context
CVSS v3.0
6.5
Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS
53.7%
All CVSS Scores
CVSS v3.0
6.5
Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v2.0
4.0
Medium
AV:N/AC:L/Au:S/C:P/I:N/A:N
Timeline
From disclosure to observed exploitation
-
Added to KEV Intelligence KEV Feed
High-confidence, third-party attested exploitation
-
CVE published
Vulnerability disclosed publicly
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2016-5312
Free JSON includes basic KEV fields{
"cve_id": "CVE-2016-5312",
"confidence": "High",
"cvss_score": 6.5,
"epss_score": 0.53702,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
Receive curator-selected alerts when exploitation activity warrants attention. Each alert includes the evidence and context needed to decide what requires attention now.