CVE-2016-9099: Symantec Corporation ASG vulnerability

CVE-2016-9099: Symantec Advanced Secure Gateway (ASG) 6.6, ASG 6.7 prior to 6.7.2.1, ProxySG 6.5 prior to 6.5.10.6, ProxyS...

Symantec Advanced Secure Gateway (ASG) 6.6, ASG 6.7 prior to 6.7.2.1, ProxySG 6.5 prior to 6.5.10.6, ProxySG 6.6, and ProxySG 6.7 prior to 6.7.2.1 are susceptible to an open redirection vulnerability. A remote attacker can use a crafted management console URL in a phishing attack to redirect the target user to a malicious web site.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 16, 2024, 22:40 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2016-9099 is an open redirect flaw in Symantec ASG and ProxySG management console URLs. An attacker could send a trusted-looking console link that redirects a user to a malicious website, supporting phishing rather than direct system compromise. Exposure is most relevant where affected ASG or ProxySG management console URLs are reachable or familiar to administrators and support users. The source bundle does not provide internet exposure data or configuration prerequisites. Prioritize if these gateway products are still in use, especially where administrators commonly receive console links by email or tickets. The business risk is credential theft and phishing trust abuse, not confirmed appliance takeover. Mitigation focus: Upgrade ASG 6.7 to 6.7.2.1 or later per vendor guidance.; Upgrade ProxySG 6.5 to 6.5.10.6 or later per vendor guidance.; Upgrade ProxySG 6.7 to 6.7.2.1 or later per vendor guidance..

Prepared: Jun 13, 2026, 05:01 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 11, 2017, 14:01 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://www.symantec.com/security-center/network-protection-security-advisories/SA155CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

Symantec CorporationASG6.6, 6.7 prior to 6.7.2.1Listed

Symantec CorporationProxySG6.5 prior to 6.5.10.6, 6.6, 6.7 prior to 6.7.2.1Listed

Weakness

CWE details

No CWE listed

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