CVE-2024-20503

Secret-key disclosure via plaintext registry storage

Published Sep 4, 2024 · Updated Sep 4, 2024

Information disclosure in Cisco Duo Authentication for Epic allows local users to read the Duo secret key from the Windows registry. Affected installers store the SKEY registry value without encryption, leaving the credential queryable in cleartext by low-privileged accounts. The issue applies regardless of device configuration and exposes the integration secret without enabling data modification or service interruption.

CVSS severity5.5
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Cisco Duo Authentication for Epic allows local users to read the Duo secret key from the Windows registry. Affected installers store the SKEY registry value without encryption, leaving the credential queryable in cleartext by low-privileged accounts. The issue applies regardless of device configuration and exposes the integration secret without enabling data modification or service interruption.

The record

CVE
CVE-2024-20503
Published
Sep 4, 2024
Updated
Sep 4, 2024
Vendor
ClamAV
Product
Duo Authentication for Epic
Classifications
CWE-311, CWE-200, T1552.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0
  2. Affected versionversion=1.0.1
  3. Affected versionversion=1.1.10
  4. Affected versionversion=1.1.13
  5. Affected versionversion=1.1.9
  6. Affected versionversion=1.2.0.95

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

ClamAV · Duo Authentication for Epicversion=1.0.0; version=1.0.1; version=1.1.10; version=1.1.13; version=1.1.9; version=1.2.0.95

Published CVSS scores

5.5Cisco Systems, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:X/RL:X/RC:X
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-311Missing Encryption of Sensitive Data
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1552.002Unsecured Credentials: Credentials in Registry

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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