Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-55521— Yamcs : Multiple Missing Function Level Access Control vulnerabilities in Yamcs Core API

Quick assessment

Affected
yamcs yamcs
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Yamcs是Yamcs团队的一款航天任务遥测数据管理软件。 Yamcs 5.12.8之前版本和5.13.2之前版本存在授权问题漏洞，该漏洞源于在IndexesApi.listPacketIndex、IndexesApi.listEventIndex、Cop1Api.disable、Cop1Api.resume、Cop1Api.initialize、Cop1Api.updateConfig和TimeApi.setTime中缺少授权检查，导致经过身份验证的低权限用户可读取数据包和事件索引元数据、更改COP-1

CVSS 8.8 · High EPSS 0.52% · P44

Affected Version Matrix 2

VendorProduct Version RangeStatus
yamcs yamcs < 5.12.8 affected
>= 5.13.0, < 5.13.2 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-55521

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Yamcs : Multiple Missing Function Level Access Control vulnerabilities in Yamcs Core API
Source: CVE Program / CVE List V5
Vulnerability Description
Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs omits authorization checks in IndexesApi.listPacketIndex, IndexesApi.listEventIndex, Cop1Api.disable, Cop1Api.resume, Cop1Api.initialize, Cop1Api.updateConfig, and TimeApi.setTime. An authenticated low-privilege user can read packet and event index metadata without ObjectPrivilegeType.ReadPacket, alter COP-1 link state without SystemPrivilege.ControlLinks, and manipulate simulation time. These operations can disclose telemetry metadata, disrupt telecommand handling, and affect system integrity and availability. This issue is fixed in versions 5.12.8 and 5.13.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Yamcs 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Yamcs是Yamcs团队的一款航天任务遥测数据管理软件。 Yamcs 5.12.8之前版本和5.13.2之前版本存在授权问题漏洞，该漏洞源于在IndexesApi.listPacketIndex、IndexesApi.listEventIndex、Cop1Api.disable、Cop1Api.resume、Cop1Api.initialize、Cop1Api.updateConfig和TimeApi.setTime中缺少授权检查，导致经过身份验证的低权限用户可读取数据包和事件索引元数据、更改COP-1
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
yamcs yamcs < 5.12.8 -

II. Public POCs for CVE-2026-55521

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-55521

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-55521 (2)

Vendor Advisories for CVE-2026-55521 (1)

Vendor Pages for CVE-2026-55521 (2)

Same Patch Batch · yamcs · 2026-08-28 · 9 CVEs total

CVE-2026-55565 9.9 CRITICAL Yamcs: Authenticated remote code execution via unescaped StreamSQL `LIKE` pattern compiled
CVE-2026-55559 9.8 CRITICAL Yamcs: Remote Code Execution via instance-template argument YAML injection (createInstance
CVE-2026-55511 9.1 CRITICAL Yamcs: Authenticated RCE via StreamSQL aggregate-compiler column-name injection in Yamcs `
CVE-2026-55552 7.5 HIGH Yamcs: Unauthenticated Directory Traversal
CVE-2026-55545 6.5 MEDIUM Yamcs: WebSocket subscription handlers omit the privilege checks their REST siblings enfor
CVE-2026-55549 6.5 MEDIUM Yamcs: Reflected XSS in the URL of the Authorize Endpoint
CVE-2026-55547 4.3 MEDIUM Yamcs: Missing Authorization on Role and Privilege Enumeration Endpoints Allows Any Authen
CVE-2026-55566 4.3 MEDIUM Yamcs: DOM XSS in Extension Routing

IV. Related Vulnerabilities

Same product: yamcs
Same vendor: yamcs
Same weakness: CWE-862

V. Comments for CVE-2026-55521

No comments yet

Leave a comment