Exploitation evidence
Known exploited · CISA KEV listed
Added 2026-09-16. Ransomware campaign use: Unknown.
CISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CISA due date: 2026-09-19. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
Acronis / Acronis Backup plugin for cPanel & WHM
Default status: unaffected
- affected: unspecified to < 1.9.3.1021 (semver)
Acronis / Acronis Backup extension for Plesk
Default status: unaffected
- affected: unspecified to < 1.8.11.638 (semver)
Acronis / Acronis Backup plugin for DirectAdmin
Default status: unaffected
- affected: unspecified to < 1.2.3.238 (semver)
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.00233,
"percentile": 0.14318
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.00233,
"percentile": 0.14289
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.00233,
"percentile": 0.14254
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.00233,
"percentile": 0.14258
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.00233,
"percentile": 0.1426
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.00233,
"percentile": 0.1426
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.00233,
"percentile": 0.14284
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.00233,
"percentile": 0.14309
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.00233,
"percentile": 0.14272
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.00233,
"percentile": 0.14224
}03 Nov 2026, 02:22 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
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"metrics": [
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"other": {
"content": {
"id": "CVE-2026-87886",
"options": [
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{
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{
"Technical Impact": "total"
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"role": "CISA Coordinator",
"timestamp": "2026-09-18T12:27:59.851837Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2026-09-16",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87886"
},
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"title": "CISA ADP Vulnrichment"
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"cna": {
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"platforms": [
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],
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"versions": [
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},
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"product": "Acronis Backup plugin for DirectAdmin",
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"descriptions": [
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"value": "Local privilege escalation due to insecure file permissions. The following products are affected: Acronis Backup plugin for cPanel & WHM (Linux) before build 1.9.3.1021, Acronis Backup extension for Plesk (Linux) before build 1.8.11.638, Acronis Backup plugin for DirectAdmin (Linux) before build 1.2.3.238."
}
],
"metrics": [
{
"cvssV3_0": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.0"
},
"format": "CVSS",
"scenarios": [
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"value": "GENERAL"
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"problemTypes": [
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"description": "CWE-276",
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"providerMetadata": {
"dateUpdated": "2026-09-17T23:09:27.166Z",
"orgId": "73dc0fef-1c66-4a72-9d2d-0a0f4012c175",
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},
"references": [
{
"name": "SEC-10986",
"tags": [
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],
"url": "https://security-advisory.acronis.com/advisories/SEC-10986"
}
],
"x_generator": {
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"cveMetadata": {
"assignerOrgId": "73dc0fef-1c66-4a72-9d2d-0a0f4012c175",
"assignerShortName": "Acronis",
"cveId": "CVE-2026-87886",
"datePublished": "2026-09-17T22:57:18.089Z",
"dateReserved": "2026-09-09T14:04:36.755Z",
"dateUpdated": "2026-09-18T14:33:42.532Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2026-87886",
"cwes": [
"CWE-276"
],
"dateAdded": "2026-09-16",
"dueDate": "2026-09-19",
"forensicTriage": "Yes",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://security-advisory.acronis.com/advisories/SEC-10986 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-87886",
"product": "Backup",
"requiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
"shortDescription": "Acronis Backup plugin for cPanel & WHM and extension for Plesk contains an incorrect default permissions vulnerability that could allow for privilege escalation.",
"vendorProject": "Acronis",
"vulnerabilityName": "Acronis Backup Incorrect Default Permissions Vulnerability"
}