How severe is CVE-2018-0373?

CVE-2018-0373 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-0373 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-0373?

CVE-2018-0373 primarily affects Cisco Anyconnect Secure Mobility Client. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-0373?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-0373 published?

CVE-2018-0373 was published on 2018-06-21 and last updated on 2026-06-17.

CVE-2018-0373

CVE-2018-0373 is a medium-severity vulnerability in Cisco Anyconnect Secure Mobility Client with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.9
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Anyconnect Secure Mobility Client
Published: 2018-06-21
Last modified: 2026-06-17

Description

A vulnerability in vpnva-6.sys for 32-bit Windows and vpnva64-6.sys for 64-bit Windows of Cisco AnyConnect Secure Mobility Client for Windows Desktop could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected system. The vulnerability is due to improper validation of user-supplied data. An attacker could exploit this vulnerability by sending a malicious request to the application. A successful exploit could allow the attacker to cause a DoS condition on the affected system. Cisco Bug IDs: CSCvj47654.

Frequently asked questions

What is CVE-2018-0373?: A vulnerability in vpnva-6.sys for 32-bit Windows and vpnva64-6.sys for 64-bit Windows of Cisco AnyConnect Secure Mobility Client for Windows Desktop could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected system. The vulnerability is due to improper validation of user-supplied data. An attacker could exploit this vulnerability by sending a malicious request to the application. A successful exploit could allow the attacker to cause a DoS condition on the affected system. Cisco Bug IDs: CSCvj47654.
How severe is CVE-2018-0373?: CVE-2018-0373 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-0373 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-0373?: CVE-2018-0373 primarily affects Cisco Anyconnect Secure Mobility Client. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-0373?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-0373 published?: CVE-2018-0373 was published on 2018-06-21 and last updated on 2026-06-17.

References

Affected products (9)

cpe:2.3:a:cisco:anyconnect_secure_mobility_client:4.5\(58\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:4.5\(1044\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:4.5\(2033\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:4.5\(2036\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:4.5\(3040\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:4.5\(4029\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:4.5\(5030\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:4.6\(362\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:4.6\(1098\):*:*:*:*:*:*:*

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