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CVE-2026-25075

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:bb68335c6c9d92bd8910e751f9933db489e9a95e66dc9c6b05ee01f96f85df33
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:63cc8ce1ad809b3f3373c16f66b3ea6f907dd207326f683ae3eab59973ceb836 · sha256:d537347a3d2ee08e… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:63cc8ce1ad809b3f3373c16f66b3ea6f907dd207326f683ae3eab59973ceb836 · sha256:d537347a3d2ee08e… · /containers/cna/metrics/0/cvssV4_0
cwe · 2 assertions

{"cweId":"CWE-191","description":"CWE-191: Integer Underflow (Wrap or Wraparound)","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:63cc8ce1ad809b3f3373c16f66b3ea6f907dd207326f683ae3eab59973ceb836 · sha256:d537347a3d2ee08e… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-476","description":"NULL Pointer Dereference (CWE-476)","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:63cc8ce1ad809b3f3373c16f66b3ea6f907dd207326f683ae3eab59973ceb836 · sha256:d537347a3d2ee08e… · /containers/cna/problemTypes/0/descriptions/1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","packageURL":"pkg:github/strongswan/strongswan","product":"strongSwan","repo":"https://github.com/strongswan/strongswan","vendor":"strongSwan","versions":[{"lessThan":"6.0.5","status":"affected","version":"4.5.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:63cc8ce1ad809b3f3373c16f66b3ea6f907dd207326f683ae3eab59973ceb836 · sha256:d537347a3d2ee08e… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:63cc8ce1ad809b3f3373c16f66b3ea6f907dd207326f683ae3eab59973ceb836 · sha256:d537347a3d2ee08e… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:63cc8ce1ad809b3f3373c16f66b3ea6f907dd207326f683ae3eab59973ceb836 · sha256:d537347a3d2ee08e… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-191","description":"CWE-191: Integer Underflow (Wrap or Wraparound)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:63cc8ce1ad809b3f3373c16f66b3ea6f907dd207326f683ae3eab59973ceb836 · sha256:d537347a3d2ee08e… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-476","description":"NULL Pointer Dereference (CWE-476)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:63cc8ce1ad809b3f3373c16f66b3ea6f907dd207326f683ae3eab59973ceb836 · sha256:d537347a3d2ee08e… · /containers/cna/problemTypes/0/descriptions/1

Source references

5 source assertions
{"url":"https://lists.debian.org/debian-lts-announce/2026/03/msg00016.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:63cc8ce1ad809b3f3373c16f66b3ea6f907dd207326f683ae3eab59973ceb836 · sha256:d537347a3d2ee08e… · /containers/adp/1/references/0
{"tags":["release-notes"],"url":"https://www.strongswan.org/blog/2026/03/23/strongswan-6.0.5-released.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:63cc8ce1ad809b3f3373c16f66b3ea6f907dd207326f683ae3eab59973ceb836 · sha256:d537347a3d2ee08e… · /containers/cna/references/1
{"tags":["vendor-advisory","exploit"],"url":"https://www.strongswan.org/blog/2026/03/23/strongswan-vulnerability-(cve-2026-25075).html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:63cc8ce1ad809b3f3373c16f66b3ea6f907dd207326f683ae3eab59973ceb836 · sha256:d537347a3d2ee08e… · /containers/cna/references/0
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/strongswan-eap-ttls-avp-parsing-integer-underflow"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:63cc8ce1ad809b3f3373c16f66b3ea6f907dd207326f683ae3eab59973ceb836 · sha256:d537347a3d2ee08e… · /containers/cna/references/3
{"tags":["technical-description","exploit"],"url":"https://y637f9qq2x.com/posts/cve-2026-25075/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:63cc8ce1ad809b3f3373c16f66b3ea6f907dd207326f683ae3eab59973ceb836 · sha256:d537347a3d2ee08e… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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