CVE-2026-15546Public exploitNetwork attack vector

Authenticated root command execution via unsanitized jffs2_exec

Published Jul 13, 2026 · Updated Jul 13, 2026

OS command injection in Shibby Tomato 1.28.0000 and earlier allows remote authenticated users to execute commands as root via NVRAM. The sbin/rc start_jffs2 routine passes the jffs2_exec NVRAM value directly to system() without validation, escaping, or an allowlist. Admin-level Web UI or CLI access must set the value, JFFS2 must mount, and start_jffs2 must run; the payload then executes persistently as root.

CVSS severity6.3
Medium
EPSS probability1.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Shibby Tomato 1.28.0000 and earlier allows remote authenticated users to execute commands as root via NVRAM. The sbin/rc start_jffs2 routine passes the jffs2_exec NVRAM value directly to system() without validation, escaping, or an allowlist. Admin-level Web UI or CLI access must set the value, JFFS2 must mount, and start_jffs2 must run; the payload then executes persistently as root.

The record

CVE
CVE-2026-15546
Published
Jul 13, 2026
Updated
Jul 13, 2026
Vendor
Shibby
Product
Tomato
Classifications
CWE-78, CWE-77, T1059.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=1.0
  2. Affected versionversion=1.1
  3. Affected versionversion=1.10
  4. Affected versionversion=1.11
  5. Affected versionversion=1.12
  6. Affected versionversion=1.13
  7. Affected versionversion=1.14
  8. Affected versionversion=1.15
  9. Affected versionversion=1.16
  10. Affected versionversion=1.17
  11. Affected versionversion=1.18
  12. Affected versionversion=1.19
  13. Affected versionversion=1.2
  14. Affected versionversion=1.20
  15. Affected versionversion=1.21
  16. Affected versionversion=1.22
  17. Affected versionversion=1.23
  18. Affected versionversion=1.24
  19. Affected versionversion=1.25
  20. Affected versionversion=1.26
  21. Affected versionversion=1.27
  22. Affected versionversion=1.28.0000
  23. Affected versionversion=1.3
  24. Affected versionversion=1.4
  25. Affected versionversion=1.5
  26. Affected versionversion=1.6
  27. Affected versionversion=1.7
  28. Affected versionversion=1.8
  29. Affected versionversion=1.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Shibby · Tomatoversion=1.0; version=1.1; version=1.10; version=1.11; version=1.12; version=1.13; version=1.14; version=1.15; version=1.16; version=1.17; version=1.18; version=1.19; version=1.2; version=1.20; version=1.21; version=1.22; version=1.23; version=1.24; version=1.25; version=1.26; version=1.27; version=1.28.0000; version=1.3; version=1.4; version=1.5; version=1.6; version=1.7; version=1.8; version=1.9

Published CVSS scores

6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Unix Shell

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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