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CVE-2023-20215

18
FAUCET Score

CVE-2023-20215 is a medium-severity vulnerability affecting Cisco AsyncOS Software for Cisco Secure Web Appliance. It allows an unauthenticated, remote attacker to bypass configured blocking rules due to improper detection of malicious traffic encoded in a specific content format. Exploitation involves an affected device connecting to a malicious server and receiving crafted HTTP responses, leading to the reception of traffic that should have been blocked. There is no public exploit code available, no evidence of active exploitation, and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
11.7.0-406CPE matchmatch criteria
cpe:2.3:o:cisco:asyncos:11.7.0-406:*:*:*:*:*:*:*
11.7.0-418CPE matchmatch criteria
cpe:2.3:o:cisco:asyncos:11.7.0-418:*:*:*:*:*:*:*
11.7.1-006CPE matchmatch criteria
cpe:2.3:o:cisco:asyncos:11.7.1-006:*:*:*:*:*:*:*
11.7.1-020CPE matchmatch criteria
cpe:2.3:o:cisco:asyncos:11.7.1-020:*:*:*:*:*:*:*
11.7.1-049CPE matchmatch criteria
cpe:2.3:o:cisco:asyncos:11.7.1-049:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.8MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.48%
Probability of exploitation in next 30 days
EPSS Percentile
38.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0048 is in the 24th percentile among its peer group of 23,705 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

sec.cloudapps.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-bypass-vXvqwzsj
Vendor Advisory