Exploitation evidence
Known exploited · CISA KEV listed
Added 2023-05-12. Ransomware campaign use: Unknown.
CISA required action: Apply updates per vendor instructions.
CISA due date: 2023-06-02. 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
n/a / polkit
Default status: Not specified
- affected: polkit 0.119
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
CVE Program record ↗ · Download tracked evidence as JSON
- https://bugzilla.redhat.com/show_bug.cgi?id=1961710
- https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/
- http://packetstormsecurity.com/files/172836/polkit-Authentication-Bypass.html
- http://packetstormsecurity.com/files/172846/Facebook-Fizz-Denial-Of-Service.html
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-3560
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": 0.21768,
"percentile": 0.97672
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.21768,
"percentile": 0.97657
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.21768,
"percentile": 0.97655
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.22193,
"percentile": 0.97692
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.22193,
"percentile": 0.97691
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.22193,
"percentile": 0.97687
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.23708,
"percentile": 0.97826
}05 Nov 2026, 06:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T17:01:06.571Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
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"references": [
{
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"x_transferred"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1961710"
},
{
"tags": [
"x_transferred"
],
"url": "https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/"
},
{
"tags": [
"x_transferred"
],
"url": "http://packetstormsecurity.com/files/172836/polkit-Authentication-Bypass.html"
},
{
"tags": [
"x_transferred"
],
"url": "http://packetstormsecurity.com/files/172846/Facebook-Fizz-Denial-Of-Service.html"
}
],
"title": "CVE Program Container"
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{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
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},
{
"Automatable": "no"
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{
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],
"role": "CISA Coordinator",
"timestamp": "2025-01-29T21:24:12.585039Z",
"version": "2.0.3"
},
"type": "ssvc"
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},
{
"other": {
"content": {
"dateAdded": "2023-05-12",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-3560"
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],
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],
"timeline": [
{
"lang": "en",
"time": "2023-05-12T00:00:00.000Z",
"value": "CVE-2021-3560 added to CISA KEV"
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"title": "CISA ADP Vulnrichment"
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"cna": {
"affected": [
{
"product": "polkit",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "polkit 0.119"
}
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],
"descriptions": [
{
"lang": "en",
"value": "It was found that polkit could be tricked into bypassing the credential checks for D-Bus requests, elevating the privileges of the requestor to the root user. This flaw could be used by an unprivileged local attacker to, for example, create a new local administrator. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability."
}
],
"problemTypes": [
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"url": "https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/"
},
{
"url": "http://packetstormsecurity.com/files/172836/polkit-Authentication-Bypass.html"
},
{
"url": "http://packetstormsecurity.com/files/172846/Facebook-Fizz-Denial-Of-Service.html"
}
]
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},
"cveMetadata": {
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"assignerShortName": "redhat",
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"datePublished": "2022-02-16T00:00:00.000Z",
"dateReserved": "2021-05-20T00:00:00.000Z",
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"state": "PUBLISHED"
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}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.23708,
"percentile": 0.97826
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.23708,
"percentile": 0.97823
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.23708,
"percentile": 0.9782
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2021-3560",
"cwes": [
"CWE-863"
],
"dateAdded": "2023-05-12",
"dueDate": "2023-06-02",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://bugzilla.redhat.com/show_bug.cgi?id=1961710; https://nvd.nist.gov/vuln/detail/CVE-2021-3560",
"product": "Polkit",
"requiredAction": "Apply updates per vendor instructions.",
"shortDescription": "Red Hat Polkit contains an incorrect authorization vulnerability through the bypassing of credential checks for D-Bus requests, allowing for privilege escalation.",
"vendorProject": "Red Hat",
"vulnerabilityName": "Red Hat Polkit Incorrect Authorization Vulnerability"
}