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CVE-2018-0886· NVD / CVE Program· CNA microsoft

The Credential Security Support Provider protocol (CredSSP) in Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1 and

The Credential Security Support Provider protocol (CredSSP) in Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1 and RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, 1703, and 1709 Windows Server 2016 and Windows Server, version 1709 allows a remote code execution vulnerability due to how CredSSP validates request during the authentication process, aka "CredSSP Remote Code Execution Vulnerability".

HighCVSS 7.0 · v3.0—Proof of concept Fix available
Published
Mar 14, 2018
Updated
Jun 16, 2026
EPSS
82.0% · 100th percentile
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Report tools

JSON

Action score

53

Plan

Add it to your regular patch cycle.

CVSS
28 / 40 · 7.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
25 / 30 · 82.0%

Affected systems

VendorProduct
microsoftwindows 10
microsoftwindows 7
microsoftwindows 8.1
microsoftwindows rt 8.1
microsoftwindows server 2008
microsoftwindows server 2012
microsoftwindows server 2016

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft windows server 2008all versions
  • microsoft windows server 2008r2
  • microsoft windows server 2012all versions
  • microsoft windows server 2012r2
  • microsoft windows server 2016all versions
  • microsoft windows server 20161709
  • microsoft windows server 20161803

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 Corporation Windows

    • Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1 and RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, 1703, and 1709 Windows Server 2016 and Windows Server, veraffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
openSUSE:Tumbleweedfreerdp2before 2.4.0-2.12.4.0-2.1
openSUSE:Tumbleweedpython-pyspnegobefore 0.5.0-1.10.5.0-1.1
openSUSE:Tumbleweedpython-pyspnegobefore 0.11.2-1.40.11.2-1.4
SUSE:Linux Enterprise Desktop 12 SP3freerdpbefore 2.0.0~git.1463131968.4e66df7-12.8.12.0.0~git.1463131968.4e66df7-12.8.1
SUSE:Linux Enterprise Software Development Kit 12 SP5freerdpbefore 2.1.2-12.20.12.1.2-12.20.1
SUSE:Linux Enterprise Workstation Extension 12 SP5vinagrebefore 3.20.2-16.3.33.20.2-16.3.3
SUSE:Linux Enterprise Workstation Extension 15freerdpbefore 2.0.0~rc4-3.3.12.0.0~rc4-3.3.1

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

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    91Now
  • CVE-2022-21907HTTP Protocol Stack Remote Code Execution Vulnerability
    67This week
  • CVE-2022-26809Remote Procedure Call Runtime Remote Code Execution Vulnerability
    66This week
  • CVE-2022-34721Windows Internet Key Exchange (IKE) Protocol Extensions Remote Code Execution Vulnerability
    62This week
  • CVE-2022-30216Windows Server Service Tampering Vulnerability
    62This week
  • CVE-2019-1181Remote Desktop Services Remote Code Execution Vulnerability
    62This week

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
opensuse:freerdp22.4.0-2.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:python-pyspnego0.5.0-1.1 · openSUSE:TumbleweedPackage registry (OSV)
suse:freerdp2.0.0~git.1463131968.4e66df7-12.8.1 · SUSE:Linux Enterprise Desktop 12 SP3Package registry (OSV)
suse:vinagre3.20.2-16.3.3 · SUSE:Linux Enterprise Workstation Extension 12 SP5Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Exploit-DB entry ×1
  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entryremote2018-04-13
Proof-of-concept repository on GitHubstars:2672018-04-02

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.

  1. Published
  2. First PoC+18 d
  3. TodaySep 30, 2026+3122 d
EPSS, last 120 days

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 researchers

Finders, 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).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • 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
Attack vector
Local
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-287 · Improper Authentication

CVSS vector

CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

nvd-primary

Root cause

Authentication is added route by route instead of being enforced in one place. When a route added later bypasses the shared middleware, the session check never runs for it.

The bug in code

The whole CWE-287 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
app.use("/admin", requireSession, adminRouter);
// Route added later skips the middlewareapp.post("/admin-api/config", updateConfig);

Fixed

ts
const admin = express.Router();admin.use(requireSession, requireRole("admin"));
admin.post("/config", updateConfig);app.use("/admin", admin);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records