CVE-2025-62291

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-01-16. NVD baseline CVSS 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.1Exploit: None knownExposed: 0

A fix is available — apply it.

In the eap-mschapv2 plugin (client-side) in strongSwan before 6.0.3, a malicious EAP-MSCHAPv2 server can send a crafted message of size 6 through 8, and cause an integer underflow that potentially results in a heap-based buffer overflow.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: Track

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
Severity81% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
61%
KEV
Not listed

Published

January 16, 2026

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated Aug 2, 2026
Patch available.
generic Patch Available

[SECURITY] [DLA 4359-1] strongswan security update

https://lists.debian.org/debian-lts-announce/2025/11/msg00002.html
generic

strongSwan - strongSwan Vulnerability (CVE-2025-62291)

https://www.strongswan.org/blog/2025/10/27/strongswan-vulnerability-%28cve-2025-62291%29.html
generic

Releases · strongswan/strongswan · GitHub

https://github.com/strongswan/strongswan/releases
generic

History for src/libcharon/plugins/eap_mschapv2 - strongswan/strongswan · GitHub

https://github.com/strongswan/strongswan/commits/master/src/libcharon/plugins/eap_mschapv2

Vendor Advisories for CVE-2025-62291(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntustrongswan-swanctl (6.0.1-6ubuntu4.1) @ questing2026-05-21ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(9 across 9 ecosystems)
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
strongswan—5.9.13-r2—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
strongswan—5.9.14-r1—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
strongswan—5.9.14-r1—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
strongswan—5.9.14-r3—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
strongswan—5.9.14-r3—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
strongswan5.9.1-1, 5.9.1-1+deb11u1, 5.9.1-1+deb11u2, 5.9.1-1+deb11u3, 5.9.1-1+deb11u45.9.1-1+deb11u5—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
strongswan5.9.8-5, 5.9.8-5+deb12u15.9.8-5+deb12u2—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
strongswan6.0.1-6, 6.0.1-6+deb13u16.0.1-6+deb13u2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
strongswan6.0.1-6, 6.0.2-16.0.3-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 27× 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 195 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2025-62291?
CVE-2025-62291 is a high vulnerability published on January 16, 2026. In the eap-mschapv2 plugin (client-side) in strongSwan before 6.0.3, a malicious EAP-MSCHAPv2 server can send a crafted message of size 6 through 8, and cause an integer underflow that potentially results in a heap-based buffer overflow.
When was CVE-2025-62291 disclosed?
CVE-2025-62291 was first published in the National Vulnerability Database on January 16, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-62291 actively exploited?
CVE-2025-62291 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 38.8% of all scored CVEs.
What is the CVSS score of CVE-2025-62291?
CVE-2025-62291 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2025-62291?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-62291, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-62291

Explore →

Is Your Infrastructure Affected by CVE-2025-62291?

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

Start Free Scan →Browse All CVEs