CVE-2022-26809

CRITICALNVD 9.89.8—Weaponized

9.8

Remote Procedure Call Runtime Remote Code Execution Vulnerability

CVSS v3: 9.8
EG Score: 9.8(high)
EPSS: 99.8%
KEV: Not listed

Published

April 15, 2022

Last Modified

November 21, 2024

Advisory Details (1)

Auto-updated May 26, 2026

Patch available. Sources: microsoft.

microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-26809

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Microsoft MSRCCVE-2022-268092022-04-12
Remote Procedure Call Runtime Remote Code Execution Vulnerability

Data Freshness Timeline

(refreshed 4× in last 7d / 9× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-05-29 13:42 UTCEPSS rescore
2026-05-26 13:43 UTCEPSS rescore
2026-05-25 23:38 UTCEG score recompute
2026-05-25 23:38 UTCVendor advisory
2026-05-25 23:38 UTCGHSA enrichment

Publicly available exploits

(7 references)

Working exploit code is in the public domain (7 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCfuckjsonp/FuckJsonp-RCE-CVE-2022-26809-SQL-XSS-FuckJsonp
First seen Jul 27, 2022
警惕一种针对红队的新型溯源手段!
Open source ↗
GitHub PoCs1ckb017/PoC-CVE-2022-26809
First seen Jun 13, 2022
PoC for CVE-2022-26809, analisys and considerations are shown in the github.io.
Open source ↗
GitHub PoCyuanLink/CVE-2022-26809
First seen May 1, 2022
Open source ↗
GitHub PoCcorelight/cve-2022-26809
First seen Apr 14, 2022
Detects attempts and successful exploitation of CVE-2022-26809
Open source ↗
GitHub PoCwebsecnl/CVE-2022-26809
First seen Apr 14, 2022
Remote Code Execution Exploit in the RPC Library
Open source ↗
GitHub PoCsherlocksecurity/Microsoft-CVE-2022-26809-The-Little-Boy
First seen Apr 14, 2022
The poc for CVE-2022-26809 RCE via RPC will be updated here.
Open source ↗
GitHub PoCauduongxuan/CVE-2022-26809
First seen Apr 14, 2022
Open source ↗

Frequently asked(5)

What is CVE-2022-26809?

CVE-2022-26809 is a critical vulnerability published on April 15, 2022. Remote Procedure Call Runtime Remote Code Execution Vulnerability

When was CVE-2022-26809 disclosed?

CVE-2022-26809 was first published in the National Vulnerability Database on April 15, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2022-26809 actively exploited?

CVE-2022-26809 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2022-26809?

CVE-2022-26809 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2022-26809?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-26809, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2022-26809

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