222 lines
11 KiB
JSON
222 lines
11 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-2026-63072",
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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": "2026-07-15T13:10:26.188Z",
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"datePublished": "2026-08-25T12:59:34.428Z",
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"dateUpdated": "2026-08-25T14:29:55.378Z"
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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": "4.0.2",
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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": "3.6.4",
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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": "3.5.8",
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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": "3.4.7",
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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": "3.0.22",
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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": "1.1.1zi",
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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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}
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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": "Filipe Casal(Trail of Bits)"
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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": "Daniel Kubec"
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}
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],
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"datePublic": "2026-08-25T11:36:16.000Z",
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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: OpenSSL CMS decryption sizes the key-unwrap output buffer based<br>on querying the unwrapped key size, but the AES-WRAP-PAD unwrap primitive<br>can write and cleanse more bytes than that query reports, causing an 8-byte<br>out-of-bounds heap write.<br><br>Impact summary: An attacker who supplies a crafted CMS message can trigger a<br>deterministic 8-byte out-of-bounds heap write when the victim decrypts it<br>with CMS_decrypt(), corrupting the heap and typically resulting in a Denial<br>of Service.<br><br>CWE: CWE-787: Out-of-bounds Write<br><br>Description: The key-wrap OID is potentially attacker-controlled on the wire.<br>CMS unwrapping allows both id-aesNNN-wrap-pad and id-aesNNN-wrap ciphers.<br>An attacker can take a legitimate message and change a single OID byte to<br>select the padded variant while leaving the message otherwise valid. Since<br>the unwrap key is derived from the recipient's private operation (ECDH key<br>agreement or ML-KEM decapsulation), the RFC 5649 integrity check cannot<br>pass, and the decryption fails with integrity failure.<br><br>The write is a fixed-size (8-byte), fixed-value (zero) heap overflow<br>immediately past the allocation, requires no special configuration, and is<br>reachable from the public CMS_decrypt() function. The consequence is<br>a heap corruption leading to a Denial of Service. The fix in the CMS code<br>sizes the unwrap output buffer for the worst case so a failed unwrap cannot<br>write past the allocation.<br><br>FIPS impact: no<br><br>As the CMS code lives outside the FIPS module boundary, no FIPS<br>modules are affected by this CVE."
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}
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],
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"value": "Issue summary: OpenSSL CMS decryption sizes the key-unwrap output buffer based\non querying the unwrapped key size, but the AES-WRAP-PAD unwrap primitive\ncan write and cleanse more bytes than that query reports, causing an 8-byte\nout-of-bounds heap write.\n\nImpact summary: An attacker who supplies a crafted CMS message can trigger a\ndeterministic 8-byte out-of-bounds heap write when the victim decrypts it\nwith CMS_decrypt(), corrupting the heap and typically resulting in a Denial\nof Service.\n\nCWE: CWE-787: Out-of-bounds Write\n\nDescription: The key-wrap OID is potentially attacker-controlled on the wire.\nCMS unwrapping allows both id-aesNNN-wrap-pad and id-aesNNN-wrap ciphers.\nAn attacker can take a legitimate message and change a single OID byte to\nselect the padded variant while leaving the message otherwise valid. Since\nthe unwrap key is derived from the recipient's private operation (ECDH key\nagreement or ML-KEM decapsulation), the RFC 5649 integrity check cannot\npass, and the decryption fails with integrity failure.\n\nThe write is a fixed-size (8-byte), fixed-value (zero) heap overflow\nimmediately past the allocation, requires no special configuration, and is\nreachable from the public CMS_decrypt() function. The consequence is\na heap corruption leading to a Denial of Service. The fix in the CMS code\nsizes the unwrap output buffer for the worst case so a failed unwrap cannot\nwrite past the allocation.\n\nFIPS impact: no\n\nAs the CMS code lives outside the FIPS module boundary, no FIPS\nmodules are affected by this CVE."
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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": "Moderate"
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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-787",
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"description": "CWE-787 Out-of-bounds Write",
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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": "2026-08-25T12:59:34.428Z"
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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/20260825.txt"
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},
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{
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"name": "4.0.2 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/9530a5fd1aacaeccdced4478ea2340a480613335"
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},
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{
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"name": "3.6.4 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/2a3dac874c8057c1f0186849bf1ede1ae7b6b756"
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},
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{
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"name": "3.5.8 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/87784ad619af36b8807c2044b3940006fccc1e42"
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},
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{
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"name": "3.4.7 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/9ec2f6d2ae2bcad907cf7ee38584855bafe4979a"
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},
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{
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"name": "3.0.22 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/a0c8ec557d9cac078f032d76cdf684fe743eb382"
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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": "Heap Buffer Overflow in CMS Key Unwrapping",
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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": "2026-08-25T14:29:50.344129Z",
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"id": "CVE-2026-63072",
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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": "2026-08-25T14:29:55.378Z"
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}
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}
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]
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}
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} |