Is CVE-2019-1721 in the CISA KEV catalog?

No. CVE-2019-1721 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-1721?

CVE-2019-1721 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2019-1721?

CVE-2019-1721 has an EPSS score of 2.07% (79th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-1721?

Upgrade telepresence video communication server to x12.5.1 or later.

CVE & CISA-KEV Catalog

CVE-2019-1721

MEDIUMEPSS 79th pctl

6.5

CVSS v3

NVD

Description

A vulnerability in the phone book feature of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker to cause the CPU to increase to 100% utilization, causing a denial of service (DoS) condition on an affected system. The vulnerability is due to improper handling of the XML input. An attacker could exploit this vulnerability by sending a Session Initiation Protocol (SIP) message with a crafted XML payload to an affected device. A successful exploit could allow the attacker to exhaust CPU resources, resulting in a DoS condition. Manual intervention may be required to recover the device. This vulnerability is fixed in Cisco Expressway Series and Cisco TelePresence Video Communication Server Releases X12.5.1 and later.

CWE-20Improper Input Validation

How to fix

Remediation Available

telepresence video communication serverNVD

Affected:< x12.5.1Fixed in:x12.5.1CVE-2019-1721derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

2.07%probability of exploitation in 30 days

79thpercentile

Elevated risk: more likely to be exploited than 79% of all known CVEs.

References

Vendor Advisory1

tools.cisco.com

Third-Party Advisory1

securityfocus.com

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	Fix

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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 2024-11-21.