CVE-2026-15544

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-13. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A vulnerability was determined in Shibby Tomato up to 1.28.0000. Affected is the function getupsvar of the file www/apcupsd/tomatodata.cgi of the component apcupsd. This manipulation of the argument Field causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized. This project is superseded by FreshTomato.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
53%
KEV
Not listed

Published

July 13, 2026

Last Modified

July 13, 2026

Advisory Details (1)

Auto-updated Jul 13, 2026
No patch confirmed yet.
generic

Stack-based buffer overflow in apcupsd CGI programs (`tomatodata.cgi`, `tomatoups.cgi`, `multimon.cgi`) via unbounded `sscanf "%s"` in `getupsvar()` in `Tomato by Shibby` firmware · Issue #IJTQ5M · 王丰毅/CVE - Gitee.com

https://gitee.com/Fengyi-Wang/CVE/issues/IJTQ5M

Vendor Advisories for CVE-2026-15544(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 22× in last 7d / 112× 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.

Showing the most recent 100 of 160 total refreshes for this CVE.

  1. 2026-08-30 05:41 UTCEG score recompute
  2. 2026-08-30 05:41 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-28 21:41 UTCEPSS rescore
  5. 2026-08-28 02:36 UTCEG score recompute
  6. 2026-08-28 02:36 UTCGHSA enrichment
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-27 14:11 UTCGHSA enrichment
  9. 2026-08-27 02:10 UTCEG score recompute
  10. 2026-08-27 02:10 UTCGHSA enrichment
  11. 2026-08-26 14:46 UTCEPSS rescore
  12. 2026-08-26 14:28 UTCGHSA enrichment
  13. 2026-08-26 02:38 UTCEG score recompute
  14. 2026-08-26 02:38 UTCGHSA enrichment
  15. 2026-08-25 13:48 UTCEPSS rescore
  16. 2026-08-25 12:42 UTCGHSA enrichment
  17. 2026-08-25 00:30 UTCEG score recompute
  18. 2026-08-25 00:30 UTCGHSA enrichment
  19. 2026-08-24 12:48 UTCEG score recompute
  20. 2026-08-24 12:48 UTCGHSA enrichment
  21. 2026-08-24 01:06 UTCGHSA enrichment
  22. 2026-08-23 13:24 UTCGHSA enrichment
  23. 2026-08-23 01:15 UTCEG score recompute
  24. 2026-08-23 01:15 UTCGHSA enrichment
  25. 2026-08-23 00:19 UTCEPSS rescore
Show 75 more
  1. 2026-08-22 13:33 UTCGHSA enrichment
  2. 2026-08-22 01:50 UTCEG score recompute
  3. 2026-08-22 01:50 UTCGHSA enrichment
  4. 2026-08-21 23:49 UTCEPSS rescore
  5. 2026-08-21 14:08 UTCGHSA enrichment
  6. 2026-08-21 02:26 UTCEG score recompute
  7. 2026-08-21 02:26 UTCGHSA enrichment
  8. 2026-08-20 22:55 UTCEPSS rescore
  9. 2026-08-20 14:43 UTCGHSA enrichment
  10. 2026-08-20 01:23 UTCEG score recompute
  11. 2026-08-20 01:23 UTCGHSA enrichment
  12. 2026-08-19 17:03 UTCEPSS rescore
  13. 2026-08-19 08:11 UTCGHSA enrichment
  14. 2026-08-18 20:30 UTCEG score recompute
  15. 2026-08-18 20:29 UTCGHSA enrichment
  16. 2026-08-18 13:48 UTCEPSS rescore
  17. 2026-08-18 02:46 UTCGHSA enrichment
  18. 2026-08-17 14:36 UTCEG score recompute
  19. 2026-08-17 14:36 UTCGHSA enrichment
  20. 2026-08-17 13:47 UTCEPSS rescore
  21. 2026-08-17 02:54 UTCGHSA enrichment
  22. 2026-08-16 15:12 UTCEG score recompute
  23. 2026-08-16 15:12 UTCGHSA enrichment
  24. 2026-08-16 14:56 UTCEPSS rescore
  25. 2026-08-16 03:30 UTCEG score recompute
  26. 2026-08-16 03:30 UTCGHSA enrichment
  27. 2026-08-16 02:14 UTCEPSS rescore
  28. 2026-08-15 15:48 UTCGHSA enrichment
  29. 2026-08-15 04:06 UTCEG score recompute
  30. 2026-08-15 04:06 UTCGHSA enrichment
  31. 2026-08-15 01:30 UTCEPSS rescore
  32. 2026-08-14 16:23 UTCGHSA enrichment
  33. 2026-08-14 04:41 UTCEG score recompute
  34. 2026-08-14 04:41 UTCGHSA enrichment
  35. 2026-08-13 22:00 UTCEPSS rescore
  36. 2026-08-13 16:59 UTCGHSA enrichment
  37. 2026-08-13 04:38 UTCGHSA enrichment
  38. 2026-08-12 16:57 UTCEG score recompute
  39. 2026-08-12 16:57 UTCGHSA enrichment
  40. 2026-08-12 13:50 UTCEPSS rescore
  41. 2026-08-12 05:15 UTCGHSA enrichment
  42. 2026-08-11 17:33 UTCEG score recompute
  43. 2026-08-11 17:33 UTCGHSA enrichment
  44. 2026-08-11 13:42 UTCEPSS rescore
  45. 2026-08-11 05:50 UTCEG score recompute
  46. 2026-08-11 05:50 UTCGHSA enrichment
  47. 2026-08-11 00:00 UTCEPSS rescore
  48. 2026-08-10 18:08 UTCGHSA enrichment
  49. 2026-08-10 06:01 UTCGHSA enrichment
  50. 2026-08-09 18:19 UTCEG score recompute
  51. 2026-08-09 18:19 UTCGHSA enrichment
  52. 2026-08-09 13:46 UTCEPSS rescore
  53. 2026-08-09 06:38 UTCGHSA enrichment
  54. 2026-08-08 18:56 UTCEG score recompute
  55. 2026-08-08 18:56 UTCGHSA enrichment
  56. 2026-08-08 16:37 UTCEPSS rescore
  57. 2026-08-08 07:14 UTCGHSA enrichment
  58. 2026-08-07 19:32 UTCEG score recompute
  59. 2026-08-07 19:32 UTCGHSA enrichment
  60. 2026-08-07 07:50 UTCGHSA enrichment
  61. 2026-08-06 20:08 UTCEG score recompute
  62. 2026-08-06 20:08 UTCGHSA enrichment
  63. 2026-08-06 13:46 UTCEPSS rescore
  64. 2026-08-06 08:26 UTCGHSA enrichment
  65. 2026-08-05 20:44 UTCEG score recompute
  66. 2026-08-05 20:44 UTCGHSA enrichment
  67. 2026-08-05 19:17 UTCEPSS rescore
  68. 2026-08-05 09:03 UTCGHSA enrichment
  69. 2026-08-04 21:19 UTCEG score recompute
  70. 2026-08-04 21:19 UTCGHSA enrichment
  71. 2026-08-04 15:10 UTCEPSS rescore
  72. 2026-08-04 10:38 UTCEPSS rescore
  73. 2026-08-04 08:53 UTCGHSA enrichment
  74. 2026-08-03 21:12 UTCEG score recompute
  75. 2026-08-03 21:12 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-15544?
CVE-2026-15544 is a high vulnerability published on July 13, 2026. A vulnerability was determined in Shibby Tomato up to 1.28.0000. Affected is the function getupsvar of the file www/apcupsd/tomatodata.cgi of the component apcupsd. This manipulation of the argument Field causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been…
When was CVE-2026-15544 disclosed?
CVE-2026-15544 was first published in the National Vulnerability Database on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15544 actively exploited?
CVE-2026-15544 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 46.7% of all scored CVEs.
What is the CVSS score of CVE-2026-15544?
CVE-2026-15544 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-15544?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15544, 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.

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