VulnerabilityPublished 5 Mar 2026Updated 9 Mar 2026

CVE-2026-28723: Acronis Cyber Protect 17 · Incorrect Authorization

Affects Acronis Cyber Protect 17Source CVE Database V5

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Not known to be exploited · CVSS 4.3 Medium : upgrade to 41186 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.0 base score

4.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 41186

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 5 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Acronis Cyber Protect 17 to 41186.

Affected software

Product	Affected	Fixed in
AcronisAcronis Cyber Protect 17	Affected ≥ unspecified, < 41186	Fixed in 41186

AI-suggested

Verify the current build version of Acronis Cyber Protect 17 in your environment and identify any installations prior to build 41186.
Restrict user privileges strictly to the minimum necessary, especially limiting report deletion permissions to trusted administrators only.
Implement monitoring and alerting for report deletion activities to detect unauthorized attempts promptly.
Maintain comprehensive logging of all report management actions and regularly audit these logs for anomalies.
6. Consider isolating Acronis management consoles and restricting network access to trusted hosts to reduce remote exploitation risk. 7. Educate administrators about the vulnerability and enforce strict operational procedures around report handling. 8. If possible, implement additional access control mechanisms or compensating controls at the network or application layer to prevent unauthorized deletions until patches are applied.

Description

Unauthorized report deletion due to insufficient access control. The following products are affected: Acronis Cyber Protect 17 (Linux, Windows) before build 41186.

Impact

The primary impact of CVE-2026-28723 is the unauthorized deletion of security and backup reports, which compromises the integrity of critical audit and operational data. This can lead to loss of forensic evidence, hinder incident response efforts, and reduce organizational visibility into security events and backup statuses. Although confidentiality and availability are not directly affected, the inability to trust report data can indirectly impair security posture and compliance adherence. Organizations relying heavily on Acronis Cyber Protect 17 for cybersecurity management and backup verification may face operational disruptions and increased risk of undetected malicious activities. Attackers with limited privileges could exploit this vulnerability to cover their tracks by deleting reports, complicating investigations. The scope includes all deployments of Acronis Cyber Protect 17 before build 41186 on Linux and Windows, which are widely used in enterprise environments globally. The absence of known exploits in the wild reduces immediate risk but does not eliminate the need for prompt mitigation.

CWE-863Incorrect Authorization (opens in a new tab)
Class weaknessLikelihood of exploit: HighCWE Top 25 (2025): #17OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
Architecture and Design
Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) to enforce the roles at the appropriate boundaries.
Architecture and Design
Ensure that access control checks are performed related to the business logic. These checks may be different than the access control checks that are applied to more generic resources such as files, connections, processes, memory, and database records.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
OWASP Cheat Sheets
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V8.3.8 (opens in a new tab)
V13.4.2 (opens in a new tab)
V7.2.2 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

security-advisory.acronis.com/advisories/SEC-8486 (opens in a new tab)

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 13 Mar 2026, 19:43 UTC

WeaknessesCWE-863

Technical details

References

Community reviews

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