CVE-2026-41502

HIGHNVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.4% (34th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Elevated

Also known asEUVD-2026-25624 (ENISA EUVD)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

The CVE record names the fixed release — apply it.

BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to 1.4.3, an off-by-one out-of-bounds read vulnerability in bacnet-stack's ReadPropertyMultiple service decoder allows unauthenticated remote attackers to read one byte past an allocated buffer boundary by sending a crafted RPM request with a truncated object identifier. The vulnerability is in rpm_decode_object_id(), which checks apdu_len < 5 but then accesses all 6 byte positions (indices 0-5) — consuming 1 byte for the context tag, 4 bytes for the object ID, then reading apdu[5] for the opening tag check. A 5-byte input passes the length check but causes a 1-byte OOB read, leading to crashes on embedded BACnet devices. The vulnerability exists in src/bacnet/rpm.c and affects any deployment that enables the ReadPropertyMultiple confirmed service handler (enabled by default in the reference server). This vulnerability is fixed in 1.4.3.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

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)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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: The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
34th
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 (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). 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 low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days 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 low or medium mission impact; Attend at high (mission-essential systems).

The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (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

April 24, 2026

Last Modified

April 28, 2026

Advisory Details (1)

Auto-updated Jun 11, 2026
Fix named in the CVE record. Sources: github.
GitHub advisoryMentions a patch (unverified)

Off-by-One Out-of-Bounds Read in ReadPropertyMultiple Object ID Decoder · Advisory · bacnet-stack/bacnet-stack · GitHub

https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-7545-3fpx-4xw3

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 39× 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.

Showing the most recent 100 of 201 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 101 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-30 10:40 UTCEG score recompute
  2. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  3. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  4. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  5. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  6. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  7. 2026-10-25 14:30 UTCEG score recompute
  8. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  9. 2026-10-24 00:38 UTCEG score recompute
  10. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  11. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  12. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
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  14. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  15. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  16. 2026-10-18 03:41 UTCEG score recompute
  17. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  18. 2026-10-17 14:35 UTCEG score recompute
  19. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  20. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  21. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  22. 2026-10-13 21:54 UTCOSV refresh
  23. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  24. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  25. 2026-10-12 16:08 UTCEG score recompute
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  1. 2026-10-11 19:50 UTCEG score recompute
  2. 2026-10-11 17:04 UTCEG score recompute
  3. 2026-10-11 14:30 UTCEG score recompute
  4. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  7. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  9. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  12. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  13. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  14. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  15. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  16. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  17. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  18. 2026-09-23 08:23 UTCOSV refresh
  19. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  20. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  21. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  22. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  23. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  24. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  25. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  26. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  27. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  28. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  29. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  30. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  31. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  32. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  33. 2026-09-04 02:59 UTCOSV refresh
  34. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  35. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  36. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  37. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  38. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  39. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  40. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  41. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  42. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  43. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  44. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  45. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  46. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  47. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  48. 2026-08-17 14:46 UTCEG score recompute
  49. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  50. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  51. 2026-08-16 05:44 UTCEG score recompute
  52. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  53. 2026-08-15 01:56 UTCEG score recompute
  54. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  55. 2026-08-14 04:05 UTCEG score recompute
  56. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  57. 2026-08-12 17:46 UTCEG score recompute
  58. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  59. 2026-08-11 16:40 UTCEG score recompute
  60. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  61. 2026-08-11 02:07 UTCEG score recompute
  62. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  63. 2026-08-09 14:12 UTCEG score recompute
  64. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  65. 2026-08-09 03:17 UTCEG score recompute
  66. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  67. 2026-08-07 23:25 UTCEG score recompute
  68. 2026-08-06 21:09 UTCEG score recompute
  69. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  70. 2026-08-05 22:54 UTCEG score recompute
  71. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  72. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  73. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  74. 2026-08-03 20:59 UTCEG score recompute
  75. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.4% · 32nd percentile

Frequently asked(5)

What is CVE-2026-41502?
CVE-2026-41502 is a high-severity vulnerability; its CVE record was published on April 24, 2026. BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to 1.4.3, an off-by-one out-of-bounds read vulnerability in bacnet-stack's ReadPropertyMultiple service decoder allows unauthenticated remote attackers to read one byte past an allocated buffer boundary by…
When was the CVE record for CVE-2026-41502 published?
The CVE record for CVE-2026-41502 was published on April 24, 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 April 28, 2026; the record at its source may have been updated since.
Is CVE-2026-41502 actively exploited?
CVE-2026-41502 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (34th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-41502?
CVE-2026-41502 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-41502?
The CVE record for CVE-2026-41502 names the fix: "This vulnerability is fixed in 1.4.3."

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