CVE-2026-55548Public exploitNetwork attack vector

Telemetry disclosure via missing per-packet authorization

Published Jul 16, 2026 · Updated Jul 16, 2026

Missing authorization in Yamcs before 5.12.8 and 5.13.0 through 5.13.1 allows remote authenticated users to read archived telemetry. When a request omits packet names, exportPackets checks an empty set, issues an unfiltered telemetry query, and streams each row without checking ReadPacket privileges. Any authenticated account, including one with no ReadPacket privilege, can retrieve the instance's complete raw telemetry archive.

CVSS severity4.3
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Yamcs before 5.12.8 and 5.13.0 through 5.13.1 allows remote authenticated users to read archived telemetry. When a request omits packet names, exportPackets checks an empty set, issues an unfiltered telemetry query, and streams each row without checking ReadPacket privileges. Any authenticated account, including one with no ReadPacket privilege, can retrieve the instance's complete raw telemetry archive.

The record

CVE
CVE-2026-55548
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
Space Applications Services
Product
Yamcs
Classifications
CWE-862, CWE-284, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 5.12.8
  2. Affected versionversion=>= 5.13.0, < 5.13.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Space Applications Services · Yamcsversion=< 5.12.8; version=>= 5.13.0, < 5.13.2

Published CVSS scores

4.3GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
CWE-284Improper Access Control
T1213Data from Information Repositories

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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