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CVE-2016-5313

26
FAUCET Score

CVE-2016-5313 is a critical vulnerability affecting Symantec Web Gateway (SWG) versions prior to 5.2.5, allowing remote authenticated users to execute arbitrary operating system commands. With a CVSS score of 8.8 (HIGH), this flaw presents a significant risk, as it can be exploited over a network with low attack complexity and user privileges, leading to high impact on confidentiality, integrity, and availability. Despite its high severity and potential for complete system compromise, there is no evidence of active exploitation, nor are there publicly available exploit modules in common frameworks like Metasploit or ExploitDB, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.2.2CPE matchmatch criteria
cpe:2.3:a:symantec:web_gateway:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.61%
Probability of exploitation in next 30 days
EPSS Percentile
90.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0461 is in the 90th percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/139006/Symantec-Web-Gateway-5.2.2-OS-Command-Injection.html
ExploitThird Party AdvisoryVDB Entry
seclists.org / fulldisclosure/2016/Oct/24
Mailing ListThird Party Advisory
symantec.com / security_response/securityupdates/detail.jsp
Vendor Advisory
securityfocus.com / bid/93284
Third Party AdvisoryVDB Entry
securitytracker.com / id/1036973
Third Party AdvisoryVDB Entry