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CVE-2022-20686

Multiple vulnerabilities in the Link Layer Discovery Protocol (LLDP) functionality of Cisco ATA 190 Series Analog Telephone Adapter…

Medium5.3EPSS 1.0%
Published
Updated
Reserved
Assigned by
cisco

Description

Multiple vulnerabilities in the Link Layer Discovery Protocol (LLDP) functionality of Cisco ATA 190 Series Analog Telephone Adapter firmware could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device and cause the LLDP service to restart. These vulnerabilities are due to missing length validation of certain LLDP packet header fields. An attacker could exploit these vulnerabilities by sending a malicious LLDP packet to an affected device. A successful exploit could allow the attacker to execute code on the affected device and cause LLDP to restart unexpectedly, resulting in a denial of service (DoS) condition.

Scores

CVSS scores of CVE-2022-20686, by who scored it
Scored byCVSSScoreVector
ciscoCNA (assigner)3.1Medium5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVDNVD · Modified3.1Medium5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS (exploitation in 30 days)
1.0% · top 37% of all CVEs (7 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.

Weakness

Affected products

  • Cisco · Cisco Analog Telephone Adaptor (ATA) Software

    • affected 1.2.1
    • affected 1.2.2 SR1
    • affected 1.2.2
    • affected 1.2.2 SR2
    • affected 11.1.0 MSR4
    • affected 11.1.0
    • affected 11.1.0 MSR1
    • affected 11.1.0 MSR2
    • affected 11.1.0 MSR3
    • affected 1.1.0
    • affected 1.1.1
    • affected 1.1.2
    • affected 12.0.1 SR2
    • affected 12.0.1
    • affected 12.0.1 SR1
    • affected 12.0.1 SR3
    • affected 12.0.1 SR4
    • affected 11.2.1

What to do

Exploitation: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .