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CVE-2016-1383

19
FAUCET Score

CVE-2016-1383 describes a memory leak vulnerability in Cisco AsyncOS up to version 8.8, specifically impacting Cisco Web Security Appliance (WSA) devices. This flaw allows remote attackers to trigger a denial of service by exploiting an unspecified HTTP status code, leading to excessive memory consumption. With a CVSS score of 7.5 (HIGH), this vulnerability is easily exploitable over the network with low attack complexity, requiring no user interaction or privileges, and can result in a complete loss of availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion, though it did receive limited media coverage at the time of disclosure.

Impacted Technologies

VendorProductVersion(s)CPE
5.6.0-623CPE matchmatch criteria
cpe:2.3:a:cisco:web_security_appliance_\(wsa\):5.6.0-623:*:*:*:*:*:*:*
6.0.0-000CPE matchmatch criteria
cpe:2.3:a:cisco:web_security_appliance_\(wsa\):6.0.0-000:*:*:*:*:*:*:*
7.1.0CPE matchmatch criteria
cpe:2.3:a:cisco:web_security_appliance_\(wsa\):7.1.0:*:*:*:*:*:*:*
7.1.1CPE matchmatch criteria
cpe:2.3:a:cisco:web_security_appliance_\(wsa\):7.1.1:*:*:*:*:*:*:*
7.1.2CPE matchmatch criteria
cpe:2.3:a:cisco:web_security_appliance_\(wsa\):7.1.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.39%
Probability of exploitation in next 30 days
EPSS Percentile
69.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0139 is in the 50th percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

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

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20160518-wsa4
Vendor Advisory
securitytracker.com / id/1035911