CVE Explorer

CVE-2026-11420

Two path traversal vulnerabilities in the Network Installation Service (NIS) of Altium Enterprise Server allow an unauthenticated network attacker to write arbitrary files to any writable location on the server filesystem and to read package archive files from the server. No authentication, session, or credentials are required. Because content-controlled files can be written to web-accessible directories, or used to overwrite application binaries or configuration files, exploitation can be e

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:67b88fd78771c794cbbfa34a717dadc559712e0afd3bbde349f3df1146a75582

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-306","description":"CWE-306 Missing authentication for critical function","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:1bc395c48fa2817bb3498150c99b6fa0ab430ba63f4fa1b93f03c5cfe2b9e5f0 · sha256:1e5f779e634d44c0… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-22","description":"CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:1bc395c48fa2817bb3498150c99b6fa0ab430ba63f4fa1b93f03c5cfe2b9e5f0 · sha256:1e5f779e634d44c0… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion

{"defaultStatus":"unaffected","modules":["Network Installation Service (NIS)"],"platforms":["Web"],"product":"Altium Enterprise Server","vendor":"Altium","versions":[{"lessThan":"8.1.1","status":"affected","version":"0","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:1bc395c48fa2817bb3498150c99b6fa0ab430ba63f4fa1b93f03c5cfe2b9e5f0 · sha256:1e5f779e634d44c0… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":10,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact…

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:1bc395c48fa2817bb3498150c99b6fa0ab430ba63f4fa1b93f03c5cfe2b9e5f0 · sha256:1e5f779e634d44c0… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions

{"cweId":"CWE-306","description":"CWE-306 Missing authentication for critical function","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:1bc395c48fa2817bb3498150c99b6fa0ab430ba63f4fa1b93f03c5cfe2b9e5f0 · sha256:1e5f779e634d44c0… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-22","description":"CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:1bc395c48fa2817bb3498150c99b6fa0ab430ba63f4fa1b93f03c5cfe2b9e5f0 · sha256:1e5f779e634d44c0… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"url":"https://www.altium.com/platform/security-compliance/security-advisories"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:1bc395c48fa2817bb3498150c99b6fa0ab430ba63f4fa1b93f03c5cfe2b9e5f0 · sha256:1e5f779e634d44c0… · /containers/cna/references/0

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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