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CVE-2022-20691

MEDIUM
6.5
CVSS Score
Published: December 7, 2022 at 04:56 PM UTC
Updated: June 17, 2026 at 04:24 AM UTC
6 products affected across 1 vendorAta 191 FirmwareAta 192 FirmwareAta 190

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.7%

Description

A vulnerability in the Cisco Discovery Protocol functionality of Cisco ATA 190 Series Adaptive Telephone Adapter firmware could allow an unauthenticated, adjacent attacker to cause a DoS condition of an affected device. This vulnerability is due to missing length validation of certain Cisco Discovery Protocol packet header fields. An attacker could exploit this vulnerability by sending crafted Cisco Discovery Protocol packets to an affected device. A successful exploit could allow the attacker to cause the device to exhaust available memory and cause the service to restart. Cisco has released firmware updates that address this vulnerability.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ata 190· Cisco
95%
All versions
Ata 191 Firmware· Cisco
95%
v < 11.2.2v < 12.0.112.0.112.0.1 sr112.0.1 sr212.0.1 sr312.0.1 sr4
Affected range stops below 11.2.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 12.0.1, so it looks safe — our inference, not a vendor statement
cisco-ata-191 (same device)
Ata 192 Firmware· Cisco
95%
v < 11.2.2
Affected range stops below 11.2.2, so it looks safe — our inference, not a vendor statement
cisco-ata-192 (same device)
Analog Telephone Adaptor· Cisco
60%
1.0(0)1.1(4)1.1.01.1.11.1.21.2.11.2.21.2.2 SR11.2.2 SR21.3411.1.011.1.0 MSR111.1.0 MSR211.1.0 MSR311.1.0 MSR411.2.112.0.112.0.1 SR112.0.1 SR212.0.1 SR312.0.1 SR42.1(5)2.1(6)2.142.152.16(1)2.16(2)3.0(0)3.1(0)3.1(1)3.1(2)3.2(0)3.2(1)3.2(3)3.2(4)9.0(3)9.2(1)9.2(3)
Ata 191· Ciscodevice
80%
All versions
Ata 192· Ciscodevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: [email protected]
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ata19x-multivuln-GEZYVvs

CVSS

6.5MEDIUM[email protected]
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400CWE-1284

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