240 lines
11 KiB
JSON
240 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-2026-21916",
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"assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
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"state": "PUBLISHED",
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"assignerShortName": "juniper",
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"dateReserved": "2026-01-05T17:32:48.711Z",
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"datePublished": "2026-04-09T21:28:05.552Z",
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"dateUpdated": "2026-04-13T13:04:16.395Z"
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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": "Junos OS",
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"vendor": "Juniper Networks",
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"versions": [
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{
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"lessThan": "23.2R2-S7",
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"status": "affected",
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"version": "0",
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"versionType": "semver"
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},
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{
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"lessThan": "23.4R2-S6",
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"status": "affected",
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"version": "23.4",
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"versionType": "semver"
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},
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{
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"lessThan": "24.2R2-S3",
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"status": "affected",
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"version": "24.2",
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"versionType": "semver"
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},
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{
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"lessThan": "24.4R2-S2",
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"status": "affected",
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"version": "24.4",
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"versionType": "semver"
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},
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{
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"lessThan": "25.2R2",
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"status": "affected",
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"version": "25.2",
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"versionType": "semver"
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},
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{
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"status": "unaffected",
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"version": "25.4R1"
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}
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]
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}
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],
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"datePublic": "2026-04-08T16:00:00.000Z",
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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": "A UNIX Symbolic Link (Symlink) Following vulnerability in the CLI of Juniper Networks Junos OS allows a local, authenticated attacker with low privileges to escalate their privileges to root which will lead to a complete compromise of the system.<br><br>When after a user has performed a specific 'file link ...' CLI operation, another user commits (unrelated configuration changes), the first user can login as root.<br><br>This issue affects Junos OS:<br><ul><li>all versions before 23.2R2-S7,</li><li>23.4 versions before 23.4R2-S6,</li><li>24.2 versions before 24.2R2-S3,</li><li>24.4 versions before 24.4R2-S2,</li><li>25.2 versions before 25.2R2.</li></ul>This issue does not affect versions 25.4R1 or later."
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}
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],
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"value": "A UNIX Symbolic Link (Symlink) Following vulnerability in the CLI of Juniper Networks Junos OS allows a local, authenticated attacker with low privileges to escalate their privileges to root which will lead to a complete compromise of the system.\n\nWhen after a user has performed a specific 'file link ...' CLI operation, another user commits (unrelated configuration changes), the first user can login as root.\n\nThis issue affects Junos OS:\n * all versions before 23.2R2-S7,\n * 23.4 versions before 23.4R2-S6,\n * 24.2 versions before 24.2R2-S3,\n * 24.4 versions before 24.4R2-S2,\n * 25.2 versions before 25.2R2.\n\n\nThis issue does not affect versions 25.4R1 or later."
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}
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],
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"exploits": [
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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": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
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}
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],
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"value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "LOW",
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"attackVector": "LOCAL",
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"availabilityImpact": "HIGH",
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"baseScore": 7.3,
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"baseSeverity": "HIGH",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"scope": "UNCHANGED",
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"userInteraction": "REQUIRED",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
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"version": "3.1"
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},
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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]
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},
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{
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"cvssV4_0": {
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"Automatable": "YES",
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"Recovery": "USER",
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"Safety": "NOT_DEFINED",
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"attackComplexity": "LOW",
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"attackRequirements": "NONE",
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"attackVector": "LOCAL",
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"baseScore": 7,
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"baseSeverity": "HIGH",
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"privilegesRequired": "LOW",
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"providerUrgency": "NOT_DEFINED",
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"subAvailabilityImpact": "LOW",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"userInteraction": "PASSIVE",
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"valueDensity": "NOT_DEFINED",
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"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/AU:Y/R:U/RE:M",
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"version": "4.0",
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"vulnAvailabilityImpact": "HIGH",
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"vulnConfidentialityImpact": "HIGH",
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"vulnIntegrityImpact": "HIGH",
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"vulnerabilityResponseEffort": "MODERATE"
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},
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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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-61",
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"description": "CWE-61 UNIX Symbolic Link (Symlink) Following",
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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": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
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"shortName": "juniper",
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"dateUpdated": "2026-04-09T21:28:05.552Z"
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},
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"references": [
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{
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"tags": [
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"vendor-advisory"
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],
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"url": "https://kb.juniper.net/JSA107807"
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}
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],
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"solutions": [
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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": "The following software releases have been updated to resolve this specific issue: 23.2R2-S7, 23.4R2-S6, 24.2R2-S3, 24.4R2-S2, 25.2R2, and all subsequent releases.<br>"
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}
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],
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"value": "The following software releases have been updated to resolve this specific issue: 23.2R2-S7, 23.4R2-S6, 24.2R2-S3, 24.4R2-S2, 25.2R2, and all subsequent releases."
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}
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],
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"source": {
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"advisory": "JSA107807",
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"defect": [
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"1865633"
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],
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"discovery": "EXTERNAL"
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},
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"title": "Junos OS: A low privileged user can escalate their privileges so that they can login as root",
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"workarounds": [
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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": "To prevent exploitation, use access controls to keep users from performing 'file link' operations."
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}
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],
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"value": "To prevent exploitation, use access controls to keep users from performing 'file link' operations."
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}
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],
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"x_generator": {
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"engine": "Vulnogram 0.1.0-dev"
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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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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-21916",
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"role": "CISA Coordinator",
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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": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-04-10T03:56:11.604149Z"
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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": "2026-04-13T13:04:16.395Z"
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}
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}
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]
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}
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} |