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CVE-2024-20420

24
FAUCET Score

CVE-2024-20420 describes an authorization bypass vulnerability in the web-based management interface of Cisco ATA 190 Series Analog Telephone Adapters. An authenticated, low-privileged remote attacker can exploit incorrect authorization verification to execute commands as an Admin user. This vulnerability carries a high CVSS score of 8.8, indicating a significant risk due to its network attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 12.0.2CPE matchmatch criteria
cpe:2.3:o:cisco:ata_191_firmware:*:*:*:*:*:*:*:*
< 11.2.5CPE matchmatch criteria
cpe:2.3:o:cisco:ata_191_firmware:*:*:*:*:*:*:*:*
< 11.2.5CPE matchmatch criteria
cpe:2.3:o:cisco:ata_192_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.36%
Probability of exploitation in next 30 days
EPSS Percentile
28.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0036 is in the 16th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

sec.cloudapps.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-ata19x-multi-RDTEqRsy
Vendor Advisory