CVE-2026-15544

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH 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: 0%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 This project is superseded by FreshTomato.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(high)
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
0%
EPSS %ILE
36%
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 / 46× 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.

  1. 2026-07-30 11:12 UTCEG score recompute
  2. 2026-07-30 11:12 UTCGHSA enrichment
  3. 2026-07-30 01:30 UTCEPSS rescore
  4. 2026-07-29 23:30 UTCGHSA enrichment
  5. 2026-07-29 11:48 UTCGHSA enrichment
  6. 2026-07-29 00:06 UTCEG score recompute
  7. 2026-07-29 00:06 UTCGHSA enrichment
  8. 2026-07-28 15:36 UTCEPSS rescore
  9. 2026-07-28 12:10 UTCGHSA enrichment
  10. 2026-07-28 00:28 UTCEG score recompute
  11. 2026-07-28 00:28 UTCGHSA enrichment
  12. 2026-07-27 14:13 UTCEPSS rescore
  13. 2026-07-27 11:24 UTCGHSA enrichment
  14. 2026-07-26 23:40 UTCEG score recompute
  15. 2026-07-26 23:40 UTCGHSA enrichment
  16. 2026-07-26 14:54 UTCEPSS rescore
  17. 2026-07-26 14:54 UTCEPSS rescore
  18. 2026-07-26 11:58 UTCEG score recompute
  19. 2026-07-26 11:58 UTCGHSA enrichment
  20. 2026-07-25 14:17 UTCEPSS rescore
  21. 2026-07-24 14:17 UTCEPSS rescore
  22. 2026-07-23 14:18 UTCEPSS rescore
  23. 2026-07-23 03:05 UTCEG score recompute
  24. 2026-07-22 14:08 UTCEPSS rescore
  25. 2026-07-21 15:24 UTCEPSS rescore
Show 21 more
  1. 2026-07-20 17:08 UTCEPSS rescore
  2. 2026-07-19 14:30 UTCEPSS rescore
  3. 2026-07-19 02:28 UTCEPSS rescore
  4. 2026-07-18 10:04 UTCEPSS rescore
  5. 2026-07-17 05:23 UTCGHSA enrichment
  6. 2026-07-16 17:41 UTCGHSA enrichment
  7. 2026-07-16 17:02 UTCEPSS rescore
  8. 2026-07-16 05:59 UTCGHSA enrichment
  9. 2026-07-15 18:16 UTCGHSA enrichment
  10. 2026-07-15 16:57 UTCEPSS rescore
  11. 2026-07-15 06:33 UTCGHSA enrichment
  12. 2026-07-15 02:00 UTCEPSS rescore
  13. 2026-07-14 18:50 UTCGHSA enrichment
  14. 2026-07-14 07:08 UTCGHSA enrichment
  15. 2026-07-13 22:30 UTCEPSS rescore
  16. 2026-07-13 19:25 UTCGHSA enrichment
  17. 2026-07-13 16:24 UTCNVD updateCVSS v4 → 7.4
  18. 2026-07-13 15:32 UTCMITRE cvelistV5CVSS v4 → 8.7
  19. 2026-07-13 08:21 UTCNVD updateCVSS v4 → 7.4
  20. 2026-07-13 07:43 UTCEG score recompute
  21. 2026-07-13 07:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

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 0% probability of exploitation in the next 30 days, which ranks it in the top 64.1% 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.

Dependency Blast Radius

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