CVE-2021-30004

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1.8%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In wpa_supplicant and hostapd 2.9, forging attacks may occur because AlgorithmIdentifier parameters are mishandled in tls/pkcs1.c and tls/x509v3.c.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100CISA SSVC

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
Severity53% × 45%
Exploitation2% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
1.8%
EPSS %ILE
77th
KEV
Not listed

CISA SSVCTrack 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). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

April 2, 2021

Last Modified

July 7, 2026

Advisory Details (2)

Auto-updated Jul 7, 2026
Patch available.
generic

ASN.1: Validate DigestAlgorithmIdentifier parameters - hostap - hostapd/wpa_supplicant

https://w1.fi/cgit/hostap/commit/?id=a0541334a6394f8237a4393b7372693cd7e96f15
generic

wpa_supplicant, hostapd: Multiple Vulnerabilities (GLSA 202309-16) — Gentoo security

https://security.gentoo.org/glsa/202309-16

Vendor Advisories for CVE-2021-30004(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(32 across 18 ecosystems)
Alpine:v3.11(2)
PackageVulnerable rangeFix by version rangeDependents
hostapd—
  • every version up to 2.9-r3: fixed in 2.9-r3
—
wpa_supplicant—
  • every version up to 2.9-r8: fixed in 2.9-r8
—
Alpine:v3.12(2)
PackageVulnerable rangeFix by version rangeDependents
hostapd—
  • every version up to 2.9-r3: fixed in 2.9-r3
—
wpa_supplicant—
  • every version up to 2.9-r8: fixed in 2.9-r8
—
Alpine:v3.13(2)
PackageVulnerable rangeFix by version rangeDependents
hostapd—
  • every version up to 2.9-r3: fixed in 2.9-r3
—
wpa_supplicant—
  • every version up to 2.9-r11: fixed in 2.9-r11
—
Alpine:v3.14(2)
PackageVulnerable rangeFix by version rangeDependents
hostapd—
  • every version up to 2.9-r3: fixed in 2.9-r3
—
wpa_supplicant—
  • every version up to 2.9-r13: fixed in 2.9-r13
—
Alpine:v3.15(2)
PackageVulnerable rangeFix by version rangeDependents
hostapd—
  • every version up to 2.9-r3: fixed in 2.9-r3
—
wpa_supplicant—
  • every version up to 2.9-r13: fixed in 2.9-r13
—
Alpine:v3.16(2)
PackageVulnerable rangeFix by version rangeDependents
hostapd—
  • every version up to 2.9-r3: fixed in 2.9-r3
—
wpa_supplicant—
  • every version up to 2.9-r13: fixed in 2.9-r13
—
Alpine:v3.17(2)
PackageVulnerable rangeFix by version rangeDependents
hostapd—
  • every version up to 2.9-r3: fixed in 2.9-r3
—
wpa_supplicant—
  • every version up to 2.9-r13: fixed in 2.9-r13
—
Alpine:v3.18(2)
PackageVulnerable rangeFix by version rangeDependents
hostapd—
  • every version up to 2.9-r3: fixed in 2.9-r3
—
wpa_supplicant—
  • every version up to 2.9-r13: fixed in 2.9-r13
—
Alpine:v3.19(2)
PackageVulnerable rangeFix by version rangeDependents
hostapd—
  • every version up to 2.9-r3: fixed in 2.9-r3
—
wpa_supplicant—
  • every version up to 2.9-r13: fixed in 2.9-r13
—
Alpine:v3.20(2)
PackageVulnerable rangeFix by version rangeDependents
hostapd—
  • every version up to 2.9-r3: fixed in 2.9-r3
—
wpa_supplicant—
  • every version up to 2.9-r13: fixed in 2.9-r13
—
Alpine:v3.21(2)
PackageVulnerable rangeFix by version rangeDependents
hostapd—
  • every version up to 2.9-r3: fixed in 2.9-r3
—
wpa_supplicant—
  • every version up to 2.9-r13: fixed in 2.9-r13
—
Alpine:v3.22(2)
PackageVulnerable rangeFix by version rangeDependents
hostapd—
  • every version up to 2.9-r3: fixed in 2.9-r3
—
wpa_supplicant—
  • every version up to 2.9-r13: fixed in 2.9-r13
—
Alpine:v3.23(2)
PackageVulnerable rangeFix by version rangeDependents
hostapd—
  • every version up to 2.9-r3: fixed in 2.9-r3
—
wpa_supplicant—
  • every version up to 2.9-r13: fixed in 2.9-r13
—
Alpine:v3.24(2)
PackageVulnerable rangeFix by version rangeDependents
hostapd—
  • every version up to 2.9-r3: fixed in 2.9-r3
—
wpa_supplicant—
  • every version up to 2.9-r13: fixed in 2.9-r13
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
wpa2:2.10-1 ... 2:2.9.0-23 (41 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
wpa—
  • every version up to 2:2.10-1: fixed in 2:2.10-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
wpa—
  • every version up to 2:2.10-1: fixed in 2:2.10-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
wpa—
  • every version up to 2:2.10-1: fixed in 2:2.10-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 33× 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.

Showing the most recent 100 of 188 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2021-30004?
CVE-2021-30004 is a medium vulnerability published on April 2, 2021. In wpa_supplicant and hostapd 2.9, forging attacks may occur because AlgorithmIdentifier parameters are mishandled in tls/pkcs1.c and tls/x509v3.c.
When was CVE-2021-30004 disclosed?
CVE-2021-30004 was first published on April 2, 2021, with the most recent update on July 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-30004 actively exploited?
CVE-2021-30004 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.8% probability of exploitation in the next 30 days (77th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2021-30004?
CVE-2021-30004 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2021-30004?
A fix for CVE-2021-30004 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2021-30004 are linked in the Vendor Advisories panel on this page.

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