CVE-2026-28718Network attack vector

Service interruption via excessive authentication logging

Published Mar 5, 2026 · Updated Mar 5, 2026

Improper input validation in Acronis Cyber Protect 17 before build 41186 allows remote attackers to interrupt service via authentication logging. The authentication logging path accepts insufficiently validated input and records excessive data, consuming resources until availability is degraded. No authentication or user interaction is required; Acronis has not disclosed the specific request field, handler, or resource-exhaustion threshold.

CVSS severity7.5
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Acronis Cyber Protect 17 before build 41186 allows remote attackers to interrupt service via authentication logging. The authentication logging path accepts insufficiently validated input and records excessive data, consuming resources until availability is degraded. No authentication or user interaction is required; Acronis has not disclosed the specific request field, handler, or resource-exhaustion threshold.

The record

CVE
CVE-2026-28718
Published
Mar 5, 2026
Updated
Mar 5, 2026
Vendor
Acronis
Product
Acronis Cyber Protect
Classifications
CWE-779, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 2026Record 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 <41186

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Acronis · Acronis Cyber Protectversion=unspecified <41186

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.3Acronis International GmbHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-779Logging of Excessive Data
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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