CVE-2021-40857Public exploitNetwork attack vector

Authenticated privilege escalation via plaintext password exposure

Published Dec 13, 2021 · Updated Aug 4, 2024

Privilege escalation in Auerswald COMpact 5500R before 8.2B allows remote authenticated users to obtain sub-admin access. The teilnehmer_profil_einzel_state endpoint accepts passwd=1 and returns another account's normally masked password in plaintext. A low-privileged PBX account and web-management access are required; exposed sub-admin credentials grant configuration access and most PBX functions.

CVSS severity8.8
High
EPSS probability2.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Auerswald COMpact 5500R before 8.2B allows remote authenticated users to obtain sub-admin access. The teilnehmer_profil_einzel_state endpoint accepts passwd=1 and returns another account's normally masked password in plaintext. A low-privileged PBX account and web-management access are required; exposed sub-admin credentials grant configuration access and most PBX functions.

The record

CVE
CVE-2021-40857
Published
Dec 13, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-522, T1555
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Weakness, pattern, technique

CWE-522Insufficiently Protected Credentials
T1555Credentials from Password Stores

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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