CVE-2023-22956Public exploitNetwork attack vector

Configuration disclosure via embedded decryption secret

Published Aug 11, 2023 · Updated Oct 10, 2024

Information disclosure in AudioCodes 400HD IP phone firmware before 3.4.8.808 allows remote attackers to decrypt configuration files. The decryption_tool ELF executable embeds a 64-byte secret used to derive a Triple DES-CBC key and IV without a device-specific secret. Possession of an encrypted centrally managed configuration file is required, after which stored credentials and other sensitive settings can be read.

CVSS severity7.5
High
EPSS probability1.36%
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 AudioCodes 400HD IP phone firmware before 3.4.8.808 allows remote attackers to decrypt configuration files. The decryption_tool ELF executable embeds a 64-byte secret used to derive a Triple DES-CBC key and IV without a device-specific secret. Possession of an encrypted centrally managed configuration file is required, after which stored credentials and other sensitive settings can be read.

The record

CVE
CVE-2023-22956
Published
Aug 11, 2023
Updated
Oct 10, 2024
Vendor
AudioCodes Ltd.
Product
AudioCodes IP Phones
Classifications
CWE-321, CWE-798, T1140
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 10, 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=400HD

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AudioCodes Ltd. · AudioCodes IP Phonesversion=400HD

Published CVSS scores

7.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-321Use of Hard-coded Cryptographic Key
CWE-798Use of Hard-coded Credentials
T1140Deobfuscate/Decode Files or Information

Public exploit references

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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