CVE-2020-1576: Microsoft SharePoint Remote Code Execution Vulnerability
Noroxi assessment
Priority: Monitor (action score 34/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 1.6% (FIRST EPSS); higher than 75.7% of all records.
- Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
- According to the record, no fixed version is available yet.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Update when a fix is released; follow the vendor's advisory.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
<p>A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the SharePoint application pool and the SharePoint server farm account.</p> <p>Exploitation of this vulnerability requires that a user uploads a specially crafted SharePoint application package to an affected version of SharePoint.</p> <p>The security update addresses the vulnerability by correcting how SharePoint checks the source markup of application packages.</p>
- Published
- Sep 11, 2020
- Updated
- Jun 16, 2026
- EPSS
- 1.6% · 75th percentile
- CWE
- CWE-494
Report tools
Action score
34
Monitor
Low priority for now.
- CVSS
- 34 / 40 · 8.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.6%
CNA vs NVD score
- NVD
- —
- CNA · microsoft
- 8.5
- NVD has not scored this yet; the score shown is the CNA’s.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- No fixed version yet
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| microsoft | sharepoint enterprise server | cpe:2.3:a:microsoft:sharepoint_enterprise_server |
| microsoft | sharepoint foundation | cpe:2.3:a:microsoft:sharepoint_foundation |
| microsoft | sharepoint server | cpe:2.3:a:microsoft:sharepoint_server |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- microsoft sharepoint enterprise server2013
- microsoft sharepoint enterprise server2016
- microsoft sharepoint foundation2010
- microsoft sharepoint foundation2013
- microsoft sharepoint server2010
- microsoft sharepoint server2019
Versions reported by the vendor
Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.
Microsoft Microsoft SharePoint Enterprise Server 2013 Service Pack 1
- 15.0.0 and later · before publicationaffected
Microsoft Microsoft SharePoint Enterprise Server 2016
- 16.0.0 and later · before publicationaffected
Microsoft Microsoft SharePoint Foundation 2010 Service Pack 2
- 13.0.0 and later · before publicationaffected
Microsoft Microsoft SharePoint Foundation 2013 Service Pack 1
- 15.0.0 and later · before publicationaffected
Microsoft Microsoft SharePoint Server 2010 Service Pack 2
- 13.0.0.0 and later · before publicationaffected
Microsoft Microsoft SharePoint Server 2019
- 16.0.0 and later · before publicationaffected
Same product
microsoft: all recordsOther highest-scoring records for the same primary product.
- CVE-2019-0604A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application paKEV99Now
- CVE-2025-49706Microsoft SharePoint Server Spoofing VulnerabilityKEV86Now
- CVE-2023-24955Microsoft SharePoint Server Remote Code Execution VulnerabilityKEV83Now
Published before and after this one in the same product
- ← EarlierCVE-2020-1482Sep 11, 2020 · Microsoft Office SharePoint XSS Vulnerability26Monitor
- ← EarlierCVE-2020-1514Sep 11, 2020 · Microsoft Office SharePoint XSS Vulnerability21Monitor
- Later →CVE-2020-1595Sep 11, 2020 · Microsoft SharePoint Remote Code Execution Vulnerability40Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-20-690 · Sep 9, 2020(Microsoft Eylül 2020 Güvenlik Güncellemelerini Yayınladı)
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-494 · Download of Code Without Integrity CheckCVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Software Integrity AttackCAPEC-184Low
- Malicious Software DownloadCAPEC-185Very High
- Malicious Software UpdateCAPEC-186High
- Malicious Automated Software Update via RedirectionCAPEC-187likelihood: High · High
- Malicious Manual Software UpdateCAPEC-533likelihood: Low · High
- Open-Source Library ManipulationCAPEC-538likelihood: Low · High
- Malicious Automated Software Update via SpoofingCAPEC-657likelihood: High · High
- Adversary in the Browser (AiTB)CAPEC-662likelihood: High · Very High
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.