CVE-2017-8759
Exploitation confirmed. First attested on 2021-11-03 by CISA-ADP, CISA KEV, GCVE · kevintel.
- Published2017-09-13
- WeaknessCWE-94
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Microsoft .NET Framework 2.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2 and 4.7 allow an attacker to execute code remotely via a malicious document or application, aka ".NET Framework Remote Code Execution Vulnerability."
Timeline
dates in UTC- 2017-09-1301:29CVE publishedNVD
- 2021-11-03Listed as exploited by GCVEGCVE
- 2021-11-03Exploitation first reportedCISA KEV
- 2021-11-03Added to the CISA KEV catalogCISA KEV
- 2025-02-1014:48SSVC exploitation set to activeCISA-ADP
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-8759?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-8759?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.5 | = 4.5.2 | no fix published | NVD |
| 3.5 | = 3.5.1 | no fix published | NVD |
| 3.5 | = 3.5 | no fix published | NVD |
| 2.0 | = 2.0 | no fix published | NVD |
| 4.6 | = 4.6.1 | no fix published | NVD |
| 4.6 | = 4.6 | no fix published | NVD |
| 4.7 | = 4.7 | no fix published | NVD |
| 4.6 | = 4.6.2 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- CISA’s required action: Apply updates per vendor instructions.due 2022-05-03
Advisories and patches
- portal.msrc.microsoft.comPatch · Vendor Advisory
Detection
read 2026-10-23 19:23 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- 16 repositories, unverifiedVoulnet/CVE-2017-8759-Exploit-samplenccgroup/CVE-2017-8759vysecurity/CVE-2017-8759BasuCert/CVE-2017-8759homjxi0e/CVE-2017-8759_-SOAP_WSDL PoC-in-GitHub
CISA Known Exploited Vulnerability
- Date Added
- 2021-11-03
- Patch Due Date
- 2022-05-03
- Ransomware Use
- Unknown
- Required Action
- Apply updates per vendor instructions.
Sources
- CISA KEVKEV entry2021-11-03
- GCVEexploitation2021-11-03
- CISA-ADPSSVC decisionactive2025-02-10
- OpenCVESSVC decisionactive—
- CISA-ADPCVSS 3.17.82025-02-10
- NVDCVSS 3.17.8read 2026-10-23
- NVDCVSS 2.09.3read 2026-10-23
- CISA-ADPweakness (CWE)CWE-942025-02-10
- FIRST EPSSEPSS score88.7 %read 2026-10-23
- PoC-in-GitHubproof of concept16read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Published
- 2017-09-13
- Last Modified
- 2026-06-17
- NVD status
- Analyzed
Frequently asked questions
What is CVE-2017-8759?
Is CVE-2017-8759 actively exploited?
What is the CVSS score for CVE-2017-8759?
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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.