CVE-2026-25532

HIGHNVD 8.08.0
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.0 under NVD CVSS v3. EPSS exploit probability: 0.2% (16th 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

Also known asEUVD-2026-5376 (ENISA EUVD)Source: ENISA EUVD

8.0EG
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: 0.2%CVSS: 8.0Exploit: 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 5.5.2, 5.4.3, 5.3.4, 5.2.6, and 5.1.6, a vulnerability exists in the WPS (Wi-Fi Protected Setup) Enrollee implementation where malformed EAP-WSC packets with truncated payloads can cause integer underflow during fragment length calculation. When processing EAP-Expanded (WSC) messages, the code computes frag_len by subtracting header sizes from the total packet length. If an attacker sends a packet where the EAP Length field covers only the header and flags but omits the expected payload (such as the 2-byte Message Length field when WPS_MSG_FLAG_LEN is set), frag_len becomes negative. This negative value is then implicitly cast to size_t when passed to wpabuf_put_data(), resulting in a very large unsigned value. This issue has been patched in versions 5.5.3, 5.4.4, 5.3.5, 5.2.7, and 5.1.7.

CVSS v3
8.0
EG Score
8.0HIGHmedium confidence
EG Risk
36
EG Risk 36/100

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)
Severity80% × 45%
Impact severity (EG Severity): CVSS 8.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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
0.2%
EPSS %ILE
16th
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 (8.0): severity, escalated by confirmed exploitation. This CVE's 8.0 is its impact severity (EG Severity), not escalated.

EG Severity
8.0 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
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). 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, and whom BOD 26-04 binds: 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.

The score's inputs: 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

February 4, 2026

Last Modified

June 17, 2026

Advisory Details (8)

Auto-updated Aug 2, 2026
Fix named in the CVE record. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

WPS Enrollee Fragment Integer Underflow Vulnerability · Advisory · espressif/esp-idf · GitHub

https://github.com/espressif/esp-idf/security/advisories/GHSA-m2h2-683f-9mw7
GitHub commit

commit de28801e8ea6 (espressif/esp-idf)

Fix landed in espressif/esp-idf commit de28801e8ea6 — awaiting tagged release

https://github.com/espressif/esp-idf/commit/de28801e8ea6a736b6f0db6fc0c682739363bb41
GitHub commit

commit cad36beb4cde (espressif/esp-idf)

Fix landed in espressif/esp-idf commit cad36beb4cde — awaiting tagged release

https://github.com/espressif/esp-idf/commit/cad36beb4cde27abcf316cd90d8d8dddbc6f213a
GitHub commit

commit b88befde6b5a (espressif/esp-idf)

Fix landed in espressif/esp-idf commit b88befde6b5a — awaiting tagged release

https://github.com/espressif/esp-idf/commit/b88befde6b5addcdd8d7373ce55c8052dea1e855
GitHub commit

commit b209fae993d7 (espressif/esp-idf)

Fix landed in espressif/esp-idf commit b209fae993d7 — awaiting tagged release

https://github.com/espressif/esp-idf/commit/b209fae993d795255827ce6b2b0d6942a377f5d4
GitHub commit

commit 73a587d42a57 (espressif/esp-idf)

Fix landed in espressif/esp-idf commit 73a587d42a57 — awaiting tagged release

https://github.com/espressif/esp-idf/commit/73a587d42a57ece1962b6a4c530b574600650f63
GitHub commit

commit 6f6766f917bc (espressif/esp-idf)

Fix landed in espressif/esp-idf commit 6f6766f917bc — awaiting tagged release

https://github.com/espressif/esp-idf/commit/6f6766f917bc940ffbcc97eac4765a6ab15d5f79
GitHub commit

commit 60f992a26de1 (espressif/esp-idf)

Fix landed in espressif/esp-idf commit 60f992a26de1 — awaiting tagged release

https://github.com/espressif/esp-idf/commit/60f992a26de17bb5406f2149a2f8282dd7ad1c59

Weakness Classification(1)

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.

Showing the most recent 99 of 204 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 105 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  2. 2026-11-01 19:36 UTCEG score recompute
  3. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  4. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  5. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  6. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  7. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  8. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  9. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  10. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  11. 2026-10-25 14:40 UTCEG score recompute
  12. 2026-10-25 06:11 UTCEG score recompute
  13. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  14. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  15. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  16. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  17. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  18. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  19. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  20. 2026-10-18 03:52 UTCEG score recompute
  21. 2026-10-17 16:45 UTCEG score recompute
  22. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  23. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  24. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  25. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
Show 74 more
  1. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  2. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  3. 2026-10-12 16:19 UTCEG score recompute
  4. 2026-10-11 20:01 UTCEG score recompute
  5. 2026-10-11 17:14 UTCEG score recompute
  6. 2026-10-11 14:46 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  10. 2026-10-09 10:55 UTCOSV refresh
  11. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  12. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  13. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  14. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  15. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  16. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  17. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  18. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  19. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  20. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  21. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  22. 2026-09-24 14:03 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  23. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  24. 2026-09-19 18:03 UTCOSV refresh
  25. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  26. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  27. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  28. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  29. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  30. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  31. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  32. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  33. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  34. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  35. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  36. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  37. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  38. 2026-08-31 21:34 UTCOSV refresh
  39. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  40. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  41. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  42. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  43. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  44. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  45. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  46. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  47. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  48. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  49. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  50. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  51. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  52. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  53. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  54. 2026-08-14 11:12 UTCEG score recompute
  55. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  56. 2026-08-13 03:31 UTCEG score recompute
  57. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  58. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  59. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  60. 2026-08-09 15:51 UTCEG score recompute
  61. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  62. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  63. 2026-08-07 22:46 UTCEG score recompute
  64. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  65. 2026-08-06 04:22 UTCEG score recompute
  66. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  67. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  68. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  69. 2026-08-02 21:25 UTCEG score recompute▲ 1.70
  70. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  71. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  72. 2026-07-30 23:21 UTCOSV refresh
  73. 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  74. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.2% · 11th percentile

Frequently asked(5)

What is CVE-2026-25532?
CVE-2026-25532 is a high-severity vulnerability; its CVE record was published on February 4, 2026. ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.5.2, 5.4.3, 5.3.4, 5.2.6, and 5.1.6, a vulnerability exists in the WPS (Wi-Fi Protected Setup) Enrollee implementation where malformed EAP-WSC packets with truncated payloads can cause integer underflow during…
When was the CVE record for CVE-2026-25532 published?
The CVE record for CVE-2026-25532 was published on February 4, 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 June 17, 2026; the record at its source may have been updated since.
Is CVE-2026-25532 actively exploited?
CVE-2026-25532 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-25532?
CVE-2026-25532 has a CVSS v3 base score of 8.0 (NVD).
How do I remediate CVE-2026-25532?
The CVE record for CVE-2026-25532 names the fix: "This issue has been patched in versions 5.5.3, 5.4.4, 5.3.5, 5.2.7, and 5.1.7."

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