Is CVE-2017-12303 in the CISA KEV catalog?

No. CVE-2017-12303 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-12303?

CVE-2017-12303 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2017-12303?

CVE-2017-12303 has an EPSS score of 1.64% (73th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2017-12303?

No published fix for CVE-2017-12303 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2017-12303

MEDIUMEPSS 73th pctl

5.3

CVSS v3

NVD

Description

A vulnerability in the Advanced Malware Protection (AMP) file filtering feature of Cisco AsyncOS Software for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to bypass a configured AMP file filtering rule. The file types affected are zipped or archived file types. The vulnerability is due to incorrect and different file hash values when AMP scans the file. An attacker could exploit this vulnerability by sending a crafted email file attachment through the targeted device. An exploit could allow the attacker to bypass a configured AMP file filter. Cisco Bug IDs: CSCvf52943.

CWE-358

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

1.64%probability of exploitation in 30 days

73rdpercentile

Elevated risk: more likely to be exploited than 73% of all known CVEs.

References

Vendor Advisory1

tools.cisco.com

Third-Party Advisory2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.