CVE-2021-34800Network attack vector

Information disclosure via sensitive log entries

Published Nov 29, 2021 · Updated Sep 16, 2024

Information disclosure in Acronis Agent before build 27147 allows remote attackers to read sensitive data written to log files. The agent records sensitive information in a log, but Acronis has not identified the affected component, logged fields, triggering input, or log-access path. Network reachability without authentication is reflected in the published assessment; the disclosed consequence is limited to reading sensitive data.

CVSS severity7.5
High
EPSS probability0.95%
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 Acronis Agent before build 27147 allows remote attackers to read sensitive data written to log files. The agent records sensitive information in a log, but Acronis has not identified the affected component, logged fields, triggering input, or log-access path. Network reachability without authentication is reflected in the published assessment; the disclosed consequence is limited to reading sensitive data.

The record

CVE
CVE-2021-34800
Published
Nov 29, 2021
Updated
Sep 16, 2024
Vendor
Acronis
Product
Acronis Agent
Classifications
CWE-532
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 29, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=unspecified <27147

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Acronis · Acronis Agentversion=unspecified <27147

Published CVSS scores

7.5INCIBE-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0INCIBE-CERTAV:N/AC:L/Au:N/C:P/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-532Insertion of Sensitive Information into Log File

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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