CVE-2026-45542

HIGHPre-NVD 7.17.1
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (25th 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

Also known asEUVD-2026-35918 (ENISA EUVD)Source: ENISA EUVD

7.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.1Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.2.6, 5.3.5, 5.4.4, 5.5.4, and 6.0, a heap buffer overflow exists in the Security Scheme 2 (SRP6a) session-setup path of the protocomm component. The first-phase handler (handle_session_command0() in components/protocomm/src/security/security2.c) trusts the length of a client-supplied protobuf field for the SRP6a username and copies it into a buffer whose size is derived from a narrower destination type. The resulting truncation-versus-copy asymmetry corrupts the heap when an oversized value is supplied. This issue has been patched in versions 5.2.7, 5.3.6, 5.4.5, 5.5.5, and 6.0.1.

CVSS v3
7.1
EG Score
7.1HIGHmedium confidence
EG Risk
32
EG Risk 32/100

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)
Severity71% × 45%
Impact severity (EG Severity): CVSS 7.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 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: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
25th
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 (7.1): severity, escalated by confirmed exploitation. This CVE's 7.1 is its impact severity (EG Severity), not escalated.

EG Severity
7.1 HIGHCVSS-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
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-30). 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.

The CVE record names the fixed release. 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

June 10, 2026

Last Modified

July 23, 2026

Advisory Details (7)

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

Heap buffer overflow in protocomm Security2 over Bluetooth · Advisory · espressif/esp-idf · GitHub

https://github.com/espressif/esp-idf/security/advisories/GHSA-9r76-858f-v6jh
GitHub commit

commit f5d24a7e919b (espressif/esp-idf)

Fix landed in espressif/esp-idf commit f5d24a7e919b — awaiting tagged release

https://github.com/espressif/esp-idf/commit/f5d24a7e919bc5f447091479656b86da6762a103
GitHub commit

commit a2f4554f10ba (espressif/esp-idf)

Fix landed in espressif/esp-idf commit a2f4554f10ba — awaiting tagged release

https://github.com/espressif/esp-idf/commit/a2f4554f10ba075c98cbc67464db096ba32497cf
GitHub commit

commit 9b4cacf9cbc6 (espressif/esp-idf)

Fix landed in espressif/esp-idf commit 9b4cacf9cbc6 — awaiting tagged release

https://github.com/espressif/esp-idf/commit/9b4cacf9cbc69379972de6a2247fcf5af9240961
GitHub commit

commit 71eb2dbe6aae (espressif/esp-idf)

Fix landed in espressif/esp-idf commit 71eb2dbe6aae — awaiting tagged release

https://github.com/espressif/esp-idf/commit/71eb2dbe6aaef830719ecac8edf409e2992b64b2
GitHub commit

commit 56c3e385611e (espressif/esp-idf)

Fix landed in espressif/esp-idf commit 56c3e385611e — awaiting tagged release

https://github.com/espressif/esp-idf/commit/56c3e385611e63162d0f2f8504ac4ae2ccfccef0
GitHub commit

commit 0ea58d79845a (espressif/esp-idf)

Fix landed in espressif/esp-idf commit 0ea58d79845a — awaiting tagged release

https://github.com/espressif/esp-idf/commit/0ea58d79845ad674d0358d5de246015a68c4cb4f

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× 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 172 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 72 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-30 19:06 UTCEG score recompute
  2. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  3. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  4. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  5. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  6. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  7. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  8. 2026-10-25 14:26 UTCEG score recompute
  9. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  10. 2026-10-24 04:23 UTCEG score recompute
  11. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  12. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  13. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  14. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  15. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  16. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  17. 2026-10-18 03:38 UTCEG score recompute
  18. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  19. 2026-10-17 13:39 UTCEG score recompute
  20. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  21. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  22. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  23. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  24. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  25. 2026-10-12 16:04 UTCEG score recompute
Show 75 more
  1. 2026-10-11 19:46 UTCEG score recompute
  2. 2026-10-11 17:00 UTCEG score recompute
  3. 2026-10-11 14:26 UTCEG score recompute
  4. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  7. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  9. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  12. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  13. 2026-10-03 09:09 UTCOSV refresh
  14. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  15. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  16. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  17. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  18. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  19. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  20. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  21. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  22. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  23. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  24. 2026-09-14 04:19 UTCEG score recompute
  25. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  26. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  27. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  28. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  29. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  30. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  31. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  32. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  33. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  34. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  35. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  36. 2026-08-31 00:20 UTCEG score recompute
  37. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  38. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  39. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  40. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  41. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  42. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  43. 2026-08-25 00:30 UTCEG score recompute
  44. 2026-08-23 10:57 UTCEG score recompute
  45. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  46. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  47. 2026-08-21 07:43 UTCEG score recompute
  48. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  49. 2026-08-20 08:54 UTCEG score recompute
  50. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  51. 2026-08-19 15:37 UTCEG score recompute
  52. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  53. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  54. 2026-08-16 23:42 UTCEG score recompute
  55. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  56. 2026-08-16 11:15 UTCEG score recompute
  57. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  58. 2026-08-15 11:02 UTCEG score recompute
  59. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  60. 2026-08-13 22:18 UTCEG score recompute
  61. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  62. 2026-08-12 19:57 UTCEG score recompute
  63. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  64. 2026-08-11 21:34 UTCEG score recompute
  65. 2026-08-11 10:22 UTCEG score recompute
  66. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  67. 2026-08-10 00:48 UTCEG score recompute
  68. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  69. 2026-08-09 02:25 UTCEG score recompute
  70. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  71. 2026-08-07 16:51 UTCEG score recompute
  72. 2026-08-06 18:26 UTCEG score recompute
  73. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  74. 2026-08-05 20:03 UTCEG score recompute
  75. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.3% · 24th percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-45542?
CVE-2026-45542 is a high-severity vulnerability; its CVE record was published on June 10, 2026. ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.2.6, 5.3.5, 5.4.4, 5.5.4, and 6.0, a heap buffer overflow exists in the Security Scheme 2 (SRP6a) session-setup path of the protocomm component. The first-phase handler (handlesessioncommand0() in…
When was the CVE record for CVE-2026-45542 published?
The CVE record for CVE-2026-45542 was published on June 10, 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 July 23, 2026; the record at its source may have been updated since.
Is CVE-2026-45542 actively exploited?
CVE-2026-45542 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (25th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-45542?
CVE-2026-45542 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-45542?
The CVE record for CVE-2026-45542 names the fix: "This issue has been patched in versions 5.2.7, 5.3.6, 5.4.5, 5.5.5, and 6.0.1."

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-45542

Explore →

Is Your Infrastructure Affected by CVE-2026-45542?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs