228 lines
12 KiB
JSON
228 lines
12 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-9076",
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"assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
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"state": "PUBLISHED",
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"assignerShortName": "openssl",
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"dateReserved": "2026-05-20T12:43:37.677Z",
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"datePublished": "2026-06-09T16:03:16.306Z",
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"dateUpdated": "2026-06-10T07:47:51.139Z"
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},
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"containers": {
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"cna": {
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"affected": [
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{
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"defaultStatus": "unaffected",
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"product": "OpenSSL",
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"vendor": "OpenSSL",
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"versions": [
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{
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"lessThan": "4.0.1",
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"status": "affected",
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"version": "4.0.0",
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"versionType": "semver"
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},
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{
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"lessThan": "3.6.3",
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"status": "affected",
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"version": "3.6.0",
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"versionType": "semver"
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},
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{
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"lessThan": "3.5.7",
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"status": "affected",
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"version": "3.5.0",
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"versionType": "semver"
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},
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{
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"lessThan": "3.4.6",
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"status": "affected",
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"version": "3.4.0",
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"versionType": "semver"
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},
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{
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"lessThan": "3.0.21",
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"status": "affected",
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"version": "3.0.0",
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"versionType": "semver"
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},
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{
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"lessThan": "1.1.1zh",
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"status": "affected",
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"version": "1.1.1",
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"versionType": "custom"
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},
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{
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"lessThan": "1.0.2zq",
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"status": "affected",
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"version": "1.0.2",
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"versionType": "custom"
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}
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]
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}
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],
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"credits": [
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{
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"lang": "en",
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"type": "reporter",
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"value": "Bhabani Sankar Das"
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},
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{
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"lang": "en",
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"type": "reporter",
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"value": "Haruki Oyama (Waseda University)"
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},
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{
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"lang": "en",
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"type": "remediation developer",
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"value": "Nikola Pajkovsky"
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}
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],
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"datePublic": "2026-06-09T14:00:00.000Z",
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"descriptions": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "Issue summary: When CMS password-based decryption (RFC 3211 / PWRI key unwrap)<br>processes attacker-supplied CMS data, an attacker-chosen stream-mode KEK<br>cipher can trigger a heap out-of-bounds read in kek_unwrap_key().<br><br>Impact summary: A heap buffer over-read may trigger a crash which leads to<br>Denial of Service for an application if the input buffer ends at a memory<br>page boundary and the following page is unmapped. There is no information<br>disclosure as the over-read bytes are not revealed to the attacker.<br><br>The key unwrapping function performs a check-byte test as specified in the<br>RFC that reads 7 bytes from a heap allocation that is based on the wrapped<br>key length from the message. There is a minimum length check based on the<br>block length of the wrapping cipher. However the cipher is selected from<br>an OID carried in the attacker's PWRI keyEncryptionAlgorithm with no<br>requirement that the cipher be a block cipher. When an attacker selects<br>a stream-mode cipher the guard will be ineffective and the allocated buffer<br>containing the unwrapped key can be too small to fit the check-bytes<br>specified in the RFC and a buffer over-read can happen.<br><br>Applications calling CMS_decrypt() or CMS_decrypt_set1_password()<br>(equivalently openssl cms -decrypt -pwri_password ...) on untrusted CMS<br>data are vulnerable to this issue. No password knowledge is required: the<br>over-read happens during the unwrap attempt before any authentication<br>succeeds.<br><br>The over-read is limited to a few bytes and is not written to output, so<br>there is no information disclosure. Triggering a crash requires the<br>allocation to border unmapped memory, which is unlikely with the normal<br>allocator.<br><br>The FIPS modules are not affected by this issue."
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}
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],
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"value": "Issue summary: When CMS password-based decryption (RFC 3211 / PWRI key unwrap)\nprocesses attacker-supplied CMS data, an attacker-chosen stream-mode KEK\ncipher can trigger a heap out-of-bounds read in kek_unwrap_key().\n\nImpact summary: A heap buffer over-read may trigger a crash which leads to\nDenial of Service for an application if the input buffer ends at a memory\npage boundary and the following page is unmapped. There is no information\ndisclosure as the over-read bytes are not revealed to the attacker.\n\nThe key unwrapping function performs a check-byte test as specified in the\nRFC that reads 7 bytes from a heap allocation that is based on the wrapped\nkey length from the message. There is a minimum length check based on the\nblock length of the wrapping cipher. However the cipher is selected from\nan OID carried in the attacker's PWRI keyEncryptionAlgorithm with no\nrequirement that the cipher be a block cipher. When an attacker selects\na stream-mode cipher the guard will be ineffective and the allocated buffer\ncontaining the unwrapped key can be too small to fit the check-bytes\nspecified in the RFC and a buffer over-read can happen.\n\nApplications calling CMS_decrypt() or CMS_decrypt_set1_password()\n(equivalently openssl cms -decrypt -pwri_password ...) on untrusted CMS\ndata are vulnerable to this issue. No password knowledge is required: the\nover-read happens during the unwrap attempt before any authentication\nsucceeds.\n\nThe over-read is limited to a few bytes and is not written to output, so\nthere is no information disclosure. Triggering a crash requires the\nallocation to border unmapped memory, which is unlikely with the normal\nallocator.\n\nThe FIPS modules are not affected by this issue."
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}
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],
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"metrics": [
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{
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"format": "other",
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"other": {
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"content": {
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"text": "Low"
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},
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"type": "https://openssl-library.org/policies/general/security-policy/"
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-125",
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"description": "CWE-125 Out-of-bounds Read",
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"lang": "en",
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"type": "CWE"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
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"shortName": "openssl",
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"dateUpdated": "2026-06-10T07:47:51.139Z"
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},
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"references": [
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{
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"name": "OpenSSL Advisory",
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"tags": [
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"vendor-advisory"
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],
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"url": "https://openssl-library.org/news/secadv/20260609.txt"
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},
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{
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"name": "4.0.1 git commit",
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"tags": [
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"patch"
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],
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"url": "https://github.com/openssl/openssl/commit/3d8d5bc1056b2f62da9fede23fedbf47e85187b0"
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},
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{
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"name": "3.6.3 git commit",
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"tags": [
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"patch"
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],
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"url": "https://github.com/openssl/openssl/commit/77bf00ab13f6ff5e516535432f0328ed70ec0c26"
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},
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{
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"name": "3.5.7 git commit",
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"tags": [
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"patch"
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],
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"url": "https://github.com/openssl/openssl/commit/715349a1d7c6db970e6815dafb90915f07307f98"
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},
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{
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"name": "3.4.6 git commit",
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"tags": [
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"patch"
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],
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"url": "https://github.com/openssl/openssl/commit/05b066366842f930fadd9a6e94df98030af431bb"
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},
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{
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"name": "3.0.21 git commit",
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"tags": [
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"patch"
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],
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"url": "https://github.com/openssl/openssl/commit/eecbe330977e8d023aae1ca2d9bdbe983ef3fdc6"
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}
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],
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"source": {
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"discovery": "UNKNOWN"
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},
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"title": "Out-of-Bounds Read in CMS Password-Based Decryption",
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"x_generator": {
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"engine": "Vulnogram 0.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.5,
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"attackVector": "NETWORK",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "NONE",
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"confidentialityImpact": "NONE"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-06-09T19:04:07.840133Z",
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"id": "CVE-2026-9076",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-06-09T19:04:20.258Z"
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}
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}
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]
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}
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} |