CVE-2026-25075

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-03-23. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week
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).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.0%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

strongSwan versions 4.5.0 prior to 6.0.5 contain an integer underflow vulnerability in the EAP-TTLS AVP parser that allows unauthenticated remote attackers to cause a denial of service by sending crafted AVP data with invalid length fields during IKEv2 authentication. Attackers can exploit the failure to validate AVP length fields before subtraction to trigger excessive memory allocation or NULL pointer dereference, crashing the charon IKE daemon.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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.
Exploitation1.0% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
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 none (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: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.0%
EPSS %ILE
62nd
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.GitHub Security Advisory CVSS
EG Likelihood
1.0% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-18). 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).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (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

March 23, 2026

Last Modified

July 14, 2026

Advisory Details (4)

Auto-updated May 1, 2026
Patch available.
Web pageMentions a patch (unverified)

[SECURITY] [DLA 4512-1] strongswan security update

https://lists.debian.org/debian-lts-announce/2026/03/msg00016.html
Web page

strongSwan 4.5.0 < 6.0.5 EAP-TTLS AVP Parsing Integer Underflow | Advisories | VulnCheck

https://www.vulncheck.com/advisories/strongswan-eap-ttls-avp-parsing-integer-underflow
Web page

strongSwan - strongSwan Vulnerability (CVE-2026-25075)

https://www.strongswan.org/blog/2026/03/23/strongswan-vulnerability-(cve-2026-25075).html

Vendor Advisories for CVE-2026-25075(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 / EcosystemFix (by version range) / PatchReleasedSource
ubuntustrongswan-swanctl (5.9.13-2ubuntu4.24.04.2) @ noble2026-10-18ubuntu

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
strongswan5.9.1-1 ... 5.9.1-1+deb11u5 (6 versions)
  • every version up to 5.9.1-1+deb11u6: fixed in 5.9.1-1+deb11u6
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
strongswan5.9.8-5, 5.9.8-5+deb12u1, 5.9.8-5+deb12u2
  • every version up to 5.9.8-5+deb12u3: fixed in 5.9.8-5+deb12u3
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
strongswan6.0.1-6, 6.0.1-6+deb13u1, 6.0.1-6+deb13u2
  • every version up to 6.0.1-6+deb13u4: fixed in 6.0.1-6+deb13u4
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
strongswan6.0.1-6, 6.0.2-1, 6.0.3-1, 6.0.4-1
  • every version up to 6.0.5-1: fixed in 6.0.5-1
—

Weakness Classification(2)

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 16× in last 7d / 41× 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 267 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 168 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:31 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  2. 2026-10-18 17:28 UTCEG score recompute
  3. 2026-10-18 17:28 UTCVendor advisory
  4. 2026-10-18 17:28 UTCGHSA enrichmentGHSA-frr2-5qjr-h4hw · GitHub severity HIGH · GitHub CVSS 7.5
  5. 2026-10-18 16:52 UTCEG score recompute
  6. 2026-10-18 16:52 UTCVendor advisory
  7. 2026-10-18 16:51 UTCGHSA enrichmentGHSA-frr2-5qjr-h4hw · GitHub severity HIGH · GitHub CVSS 7.5
  8. 2026-10-18 16:31 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  9. 2026-10-18 03:53 UTCEG score recompute
  10. 2026-10-17 16:51 UTCEG score recompute
  11. 2026-10-17 16:50 UTCGHSA enrichmentGHSA-frr2-5qjr-h4hw · GitHub severity HIGH · GitHub CVSS 7.5
  12. 2026-10-17 16:33 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  13. 2026-10-16 16:41 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  14. 2026-10-15 16:31 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  15. 2026-10-14 16:32 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  16. 2026-10-13 16:33 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  17. 2026-10-12 16:33 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  18. 2026-10-12 16:19 UTCEG score recompute
  19. 2026-10-11 20:01 UTCEG score recompute
  20. 2026-10-11 17:14 UTCEG score recompute
  21. 2026-10-11 14:46 UTCEG score recompute
  22. 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  23. 2026-10-11 07:25 UTCOSV refresh
  24. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  25. 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
Show 74 more
  1. 2026-10-08 17:11 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  2. 2026-10-07 23:47 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  3. 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  4. 2026-10-05 17:42 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  5. 2026-10-04 23:21 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  6. 2026-10-03 14:25 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  7. 2026-10-01 19:49 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  8. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  9. 2026-09-29 15:21 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  10. 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  11. 2026-09-27 13:47 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  12. 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  13. 2026-09-26 00:26 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  14. 2026-09-24 14:03 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  15. 2026-09-21 19:49 UTCOSV refresh
  16. 2026-09-20 20:15 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  17. 2026-09-18 19:27 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  18. 2026-09-16 14:07 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  19. 2026-09-16 05:15 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  20. 2026-09-13 16:47 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  21. 2026-09-12 15:01 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  22. 2026-09-11 14:52 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  23. 2026-09-10 09:34 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  24. 2026-09-08 22:00 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  25. 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  26. 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  27. 2026-09-04 05:06 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  28. 2026-09-02 16:08 UTCOSV refresh
  29. 2026-09-02 14:11 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  30. 2026-09-01 13:53 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  31. 2026-09-01 04:39 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  32. 2026-08-30 19:17 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  33. 2026-08-30 01:22 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  34. 2026-08-28 21:41 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  35. 2026-08-27 14:25 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  36. 2026-08-26 14:46 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  37. 2026-08-25 13:48 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  38. 2026-08-23 00:19 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  39. 2026-08-21 23:49 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  40. 2026-08-20 22:55 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  41. 2026-08-19 17:03 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  42. 2026-08-18 13:48 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  43. 2026-08-17 13:47 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  44. 2026-08-16 14:56 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  45. 2026-08-16 10:46 UTCEG score recompute
  46. 2026-08-16 10:46 UTCVendor advisory
  47. 2026-08-16 10:46 UTCGHSA enrichmentGHSA-frr2-5qjr-h4hw · GitHub severity HIGH · GitHub CVSS 7.5
  48. 2026-08-16 02:14 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  49. 2026-08-15 01:30 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  50. 2026-08-14 19:45 UTCVendor advisory
  51. 2026-08-14 19:45 UTCGHSA enrichmentGHSA-frr2-5qjr-h4hw · GitHub severity HIGH · GitHub CVSS 7.5
  52. 2026-08-14 06:57 UTCEG score recompute
  53. 2026-08-14 06:57 UTCVendor advisory
  54. 2026-08-14 06:57 UTCGHSA enrichmentGHSA-frr2-5qjr-h4hw · GitHub severity HIGH · GitHub CVSS 7.5
  55. 2026-08-13 22:00 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  56. 2026-08-12 21:39 UTCEG score recompute
  57. 2026-08-12 21:39 UTCVendor advisory
  58. 2026-08-12 21:39 UTCGHSA enrichmentGHSA-frr2-5qjr-h4hw · GitHub severity HIGH · GitHub CVSS 7.5
  59. 2026-08-12 13:50 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  60. 2026-08-11 21:13 UTCEG score recompute
  61. 2026-08-11 21:13 UTCVendor advisory
  62. 2026-08-11 21:13 UTCGHSA enrichmentGHSA-frr2-5qjr-h4hw · GitHub severity HIGH · GitHub CVSS 7.5
  63. 2026-08-11 13:42 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  64. 2026-08-11 04:16 UTCEG score recompute
  65. 2026-08-11 04:16 UTCVendor advisory
  66. 2026-08-11 04:16 UTCGHSA enrichmentGHSA-frr2-5qjr-h4hw · GitHub severity HIGH · GitHub CVSS 7.5
  67. 2026-08-11 00:00 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  68. 2026-08-10 07:25 UTCVendor advisory
  69. 2026-08-10 07:25 UTCGHSA enrichmentGHSA-frr2-5qjr-h4hw · GitHub severity HIGH · GitHub CVSS 7.5
  70. 2026-08-09 19:00 UTCEG score recompute
  71. 2026-08-09 19:00 UTCVendor advisory
  72. 2026-08-09 19:00 UTCGHSA enrichmentGHSA-frr2-5qjr-h4hw · GitHub severity HIGH · GitHub CVSS 7.5
  73. 2026-08-09 13:46 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  74. 2026-08-09 06:33 UTCEG score recompute

Public detection checks

(1 reference)

A public detection check is referenced for this CVE (1 GitHub checker repository). A GitHub repository named or described as a checker or scanner checks whether a system is affected; it is not necessarily exploit code.

  • GitHub checkerBishopFox/CVE-2026-25075-check
    Published Mar 26, 2026
    Open source ↗

Frequently asked(5)

What is CVE-2026-25075?
CVE-2026-25075 is a high-severity vulnerability; its CVE record was published on March 23, 2026. strongSwan versions 4.5.0 prior to 6.0.5 contain an integer underflow vulnerability in the EAP-TTLS AVP parser that allows unauthenticated remote attackers to cause a denial of service by sending crafted AVP data with invalid length fields during IKEv2 authentication. Attackers can exploit the…
When was CVE-2026-25075 made public?
CVE-2026-25075 was made public on March 23, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on March 23, 2026. EchelonGraph's copy of the record carries a last-modified date of July 14, 2026; the record at its source may have been updated since.
Is CVE-2026-25075 actively exploited?
CVE-2026-25075 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.0% probability of exploitation in the next 30 days (62nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-25075?
CVE-2026-25075 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-25075?
A fix for CVE-2026-25075 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-25075 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-25075

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