CVE-2026-44254

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (41st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
5.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 1.0.0 until 4.14.6 and 5.0.0-beta2, HandleSecureMessage() in src/remoted/secure.c passes a pointer inside its stack buffer to ReadSecMSG(), and src/os_crypto/shared/msgs.c decompresses up to OS_MAXSTR bytes at that offset. For an encrypted agent message on TCP port 1514 that expands to 65,536 bytes, os_zlib_uncompress() writes a terminating null byte beyond the end of the destination buffer. The resulting stack out-of-bounds write in the root-level remoted daemon can crash message processing and disrupt agent communications. This issue is fixed in versions 4.14.6 and 5.0.0-beta2.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity53% × 45%
Impact severity (EG Severity): CVSS 5.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
41st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (5.3): severity, escalated by confirmed exploitation. This CVE's 5.3 is its impact severity (EG Severity), not escalated.

EG Severity
5.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 19, 2026

Last Modified

September 18, 2026

Advisory Details (5)

Auto-updated Aug 19, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
GitHub advisoryMentions a patch (unverified)

Stack Out-of-Bounds Write in remoted Decompression Path · Advisory · wazuh/wazuh · GitHub

https://github.com/wazuh/wazuh/security/advisories/GHSA-9wm4-fp6c-hqgq
GitHub release Patch Available

Wazuh v5.0.0 Beta 2

Patch available: wazuh/wazuh v5.0.0-beta2 (pre-release)

https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2
GitHub release Patch Available

Wazuh v4.14.6

Patch available: wazuh/wazuh v4.14.6

https://github.com/wazuh/wazuh/releases/tag/v4.14.6
GitHub pull request Patch Available

Improve message handling robustness in wazuh-remoted

Patch available: wazuh/wazuh v5.0.0-beta2 (PR #35773 merged 2026-04-29)

https://github.com/wazuh/wazuh/pull/35773
GitHub commit Patch Available

commit 96772487fbde (wazuh/wazuh)

Patch available: wazuh/wazuh v5.0.0-beta2 (contains commit 96772487fbde)

https://github.com/wazuh/wazuh/commit/96772487fbdecd43cc83e284ee7aeb45e3cfcd96

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 40× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  2. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  3. 2026-10-18 03:39 UTCEG score recompute
  4. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  5. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  6. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  7. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  8. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  9. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  10. 2026-10-12 16:05 UTCEG score recompute
  11. 2026-10-11 19:47 UTCEG score recompute
  12. 2026-10-11 17:02 UTCEG score recompute
  13. 2026-10-11 14:27 UTCEG score recompute
  14. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  15. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  16. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  17. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  18. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  19. 2026-10-07 10:28 UTCEG score recompute
  20. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  21. 2026-10-06 07:58 UTCEG score recompute
  22. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  23. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  24. 2026-10-03 16:56 UTCEG score recompute
  25. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.5% · 40th percentile
Show 70 more
  1. 2026-10-02 12:57 UTCEG score recompute
  2. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-10-01 10:14 UTCEG score recompute
  4. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  5. 2026-09-30 08:45 UTCEG score recompute
  6. 2026-09-28 08:29 UTCEG score recompute
  7. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  8. 2026-09-27 06:59 UTCEG score recompute
  9. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  10. 2026-09-25 00:59 UTCEG score recompute
  11. 2026-09-23 23:29 UTCEG score recompute
  12. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  13. 2026-09-22 21:19 UTCEG score recompute
  14. 2026-09-21 19:49 UTCEG score recompute
  15. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  16. 2026-09-19 16:33 UTCEG score recompute
  17. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  18. 2026-09-18 13:00 UTCEG score recompute
  19. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  20. 2026-09-17 11:31 UTCEG score recompute
  21. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  22. 2026-09-16 09:51 UTCEG score recompute
  23. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  24. 2026-09-15 06:22 UTCEG score recompute
  25. 2026-09-14 04:53 UTCEG score recompute
  26. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  27. 2026-09-13 03:24 UTCEG score recompute
  28. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  29. 2026-09-12 01:54 UTCEG score recompute
  30. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  31. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  32. 2026-09-11 00:24 UTCEG score recompute
  33. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  34. 2026-09-09 02:36 UTCEG score recompute
  35. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  36. 2026-09-07 23:27 UTCEG score recompute
  37. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  38. 2026-09-06 21:55 UTCEG score recompute
  39. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  40. 2026-09-05 20:20 UTCEG score recompute
  41. 2026-09-04 18:51 UTCEG score recompute
  42. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  43. 2026-09-02 15:19 UTCEG score recompute
  44. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  45. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  46. 2026-09-01 13:21 UTCEG score recompute
  47. 2026-08-31 11:52 UTCEG score recompute
  48. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  49. 2026-08-30 10:23 UTCEG score recompute
  50. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  51. 2026-08-29 08:52 UTCEG score recompute
  52. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  53. 2026-08-28 07:20 UTCEG score recompute
  54. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  55. 2026-08-27 05:45 UTCEG score recompute
  56. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  57. 2026-08-26 04:15 UTCEG score recompute
  58. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  59. 2026-08-25 02:45 UTCEG score recompute
  60. 2026-08-24 01:16 UTCEG score recompute
  61. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  62. 2026-08-22 23:47 UTCEG score recompute
  63. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  64. 2026-08-21 22:18 UTCEG score recompute
  65. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  66. 2026-08-19 19:20 UTCEG score recompute
  67. 2026-08-19 18:23 UTCEG score recompute
  68. 2026-08-19 16:24 UTCEG score recompute
  69. 2026-08-19 16:12 UTCEG score recomputeFirst assessed: 5.3 MEDIUM
  70. 2026-08-19 16:12 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-44254?
CVE-2026-44254 is a medium-severity vulnerability; its CVE record was published on August 19, 2026. Wazuh is a free and open source platform used for threat prevention, detection, and response. From 1.0.0 until 4.14.6 and 5.0.0-beta2, HandleSecureMessage() in src/remoted/secure.c passes a pointer inside its stack buffer to ReadSecMSG(), and src/oscrypto/shared/msgs.c decompresses up to OSMAXSTR…
When was the CVE record for CVE-2026-44254 published?
The CVE record for CVE-2026-44254 was published on August 19, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 18, 2026; the record at its source may have been updated since.
Is CVE-2026-44254 actively exploited?
CVE-2026-44254 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (41st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-44254?
CVE-2026-44254 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-44254?
A fix for CVE-2026-44254 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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