Cisco ATA 190 Series Analog Telephone Adapter Firmware Privilege Escalation Vulnerability

published 2024-10-16 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-18135

cvss: 5.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits: 0; none known

A vulnerability in the web-based management interface of Cisco ATA 190 Series Analog Telephone Adapter firmware could allow an authenticated, remote attacker with low privileges to run commands as an Admin user.

This vulnerability is due to incorrect authorization verification by the HTTP server. An attacker could exploit this vulnerability by sending a malicious request to the web-based management interface. A successful exploit could allow the attacker to run commands as the Admin user.

Patch / fix

fixed in 2

cisco ata_191_firmware 11.2.5, 12.0.2
cisco ata_192_firmware 11.2.5

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-10-16)

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Cisco Cisco Analog Telephone Adaptor (ATA) Software

Classification

Weakness

CWE-250 Execution with Unnecessary Privileges
CWE-863 Incorrect Authorization

References

sec.cloudapps.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-ata19x-multi-RDTEqRsy
vendor-advisory

Sources

CVE List CVE-2024-20420
NVD CVE-2024-20420

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Summary