Exploitation evidence
Known exploited · CISA KEV listed
Added 2023-10-10. Ransomware campaign use: Unknown.
CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA due date: 2023-10-31. 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
Microsoft / Skype for Business Server 2015 CU13
Default status: Not specified
- affected: 9319.0 to < 6.0.9319.869 (custom)
Microsoft / Skype for Business Server 2019 CU7
Default status: Not specified
- affected: 2046.0 to < 7.0.246.530 (custom)
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": 0.90282,
"percentile": 0.99801
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.90282,
"percentile": 0.998
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.90282,
"percentile": 0.998
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.90282,
"percentile": 0.998
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.90282,
"percentile": 0.998
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.90282,
"percentile": 0.998
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.90282,
"percentile": 0.99799
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.90282,
"percentile": 0.99799
}04 Nov 2026, 18:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2023-41763",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-07-16T20:26:59.238274Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2023-10-10",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-41763"
},
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],
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}
],
"timeline": [
{
"lang": "en",
"time": "2023-10-10T00:00:00.000Z",
"value": "CVE-2023-41763 added to CISA KEV"
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],
"title": "CISA ADP Vulnrichment"
},
{
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"references": [
{
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],
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-41763"
}
],
"title": "CVE Program Container"
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],
"cna": {
"affected": [
{
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],
"product": "Skype for Business Server 2015 CU13",
"vendor": "Microsoft",
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},
{
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],
"cpeApplicability": [
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},
{
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],
"datePublic": "2023-10-10T07:00:00.000Z",
"descriptions": [
{
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"metrics": [
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C",
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],
"providerMetadata": {
"dateUpdated": "2025-04-14T22:45:50.701Z",
"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"shortName": "microsoft"
},
"references": [
{
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"tags": [
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],
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-41763"
}
],
"title": "Skype for Business Elevation of Privilege Vulnerability"
}
},
"cveMetadata": {
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"datePublished": "2023-10-10T17:07:24.950Z",
"dateReserved": "2023-08-31T23:08:32.064Z",
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"state": "PUBLISHED"
},
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}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.90282,
"percentile": 0.99798
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.90282,
"percentile": 0.99798
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2023-41763",
"cwes": [
"CWE-918"
],
"dateAdded": "2023-10-10",
"dueDate": "2023-10-31",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2023-41763; https://nvd.nist.gov/vuln/detail/CVE-2023-41763",
"product": "Skype for Business",
"requiredAction": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
"shortDescription": "Microsoft Skype for Business contains an unspecified vulnerability that allows for privilege escalation.",
"vendorProject": "Microsoft",
"vulnerabilityName": "Microsoft Skype for Business Privilege Escalation Vulnerability"
}