CVE-2025-21590

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-21590", "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "state": "PUBLISHED", "assignerShortName": "juniper", "dateReserved": "2024-12-26T14:47:11.667Z", "datePublished": "2025-03-12T13:59:43.038Z", "dateUpdated": "2026-02-26T19:09:35.631Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Junos OS", "vendor": "Juniper Networks", "versions": [{"lessThan": "21.2R3-S9", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "21.4R3-S10", "status": "affected", "version": "21.4", "versionType": "semver"}, {"lessThan": "22.2R3-S6", "status": "affected", "version": "22.2", "versionType": "semver"}, {"lessThan": "22.4R3-S6", "status": "affected", "version": "22.4", "versionType": "semver"}, {"lessThan": "23.2R2-S3", "status": "affected", "version": "23.2", "versionType": "semver"}, {"lessThan": "23.4R2-S4", "status": "affected", "version": "23.4", "versionType": "semver"}, {"lessThan": "24.2R1-S2, 24.2R2", "status": "affected", "version": "24.2", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "reporter", "value": "Juniper SIRT would like to acknowledge and thank Matteo Memelli from Amazon for responsibly reporting this issue. Note: Amazon found the issue during internal security research and not due to exploitation."}], "datePublic": "2025-03-12T14:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "An Improper Isolation or Compartmentalization vulnerability in the kernel of Juniper Networks Junos OS allows a local attacker with high privileges to compromise the integrity of the device.<br><br>A local attacker with access to the shell is able to inject arbitrary code which can compromise an affected device.<br>This issue is not exploitable from the Junos CLI.<br><p>This issue affects Junos OS:&nbsp;</p><p></p><ul><li>All versions before 21.2R3-S9,</li><li>21.4 versions before 21.4R3-S10,&nbsp;</li><li>22.2 versions before 22.2R3-S6,&nbsp;</li><li>22.4 versions before 22.4R3-S6,&nbsp;</li><li>23.2 versions before 23.2R2-S3,&nbsp;</li><li>23.4 versions before 23.4R2-S4,</li><li>24.2 versions before 24.2R1-S2, 24.2R2.</li></ul><p></p>"}], "value": "An Improper Isolation or Compartmentalization vulnerability in the kernel of Juniper Networks Junos OS allows a local attacker with high privileges to compromise the integrity of the device.\n\nA local attacker with access to the shell is able to inject arbitrary code which can compromise an affected device.\nThis issue is not exploitable from the Junos CLI.\nThis issue affects Junos OS:\u00a0\n\n\n\n * All versions before 21.2R3-S9,\n * 21.4 versions before 21.4R3-S10,\u00a0\n * 22.2 versions before 22.2R3-S6,\u00a0\n * 22.4 versions before 22.4R3-S6,\u00a0\n * 23.2 versions before 23.2R2-S3,\u00a0\n * 23.4 versions before 23.4R2-S4,\n * 24.2 versions before 24.2R1-S2, 24.2R2."}], "exploits": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "At least one instance of malicious exploitation has been reported to the Juniper SIRT. 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We'll publish an updated version with the complete fix and update this advisory as soon as possible."}, {"lang": "en", "time": "2025-05-06T08:00:00.000Z", "value": "For the products/platforms specifically mentioned in the solution section: Please note that Junos OS version 21.2R3-S9.21 has been publish with the complete fix."}], "title": "Junos OS: An local attacker with shell access can execute arbitrary code", "workarounds": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "It is strongly recommended to mitigate the risk of exploitation by restricting shell access to trusted users only.\n\n<br>"}], "value": "It is strongly recommended to mitigate the risk of exploitation by restricting shell access to trusted users only."}], "x_generator": {"engine": "Vulnogram 0.1.0-dev"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-21590", "role": "CISA Coordinator", "options": [{"Exploitation": "active"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2025-03-14T03:55:21.999597Z"}}}, {"other": {"type": "kev", "content": {"dateAdded": "2025-03-13", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21590"}}}], "references": [{"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21590", "tags": ["government-resource"]}], "timeline": [{"time": "2025-03-13T00:00:00.000Z", "lang": "en", "value": "CVE-2025-21590 added to CISA KEV"}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-02-26T19:09:35.631Z"}}]}}

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Junos CLI.\nThis issue affects Junos OS:\u00a0\n\n\n\n * All versions before 21.2R3-S9,\n * 21.4 versions before 21.4R3-S10,\u00a0\n * 22.2 versions before 22.2R3-S6,\u00a0\n * 22.4 versions before 22.4R3-S6,\u00a0\n * 23.2 versions before 23.2R2-S3,\u00a0\n * 23.4 versions before 23.4R2-S4,\n * 24.2 versions before 24.2R1-S2, 24.2R2."}, {"lang": "es", "value": "Una vulnerabilidad de aislamiento o compartimentaci\u00f3n inadecuados en el kernel de Junos OS de Juniper Networks permite a un atacante local con privilegios elevados comprometer la integridad del dispositivo. Un atacante local con acceso al shell puede inyectar c\u00f3digo arbitrario que puede comprometer un dispositivo afectado. Este problema no se puede explotar desde la interfaz de l\u00ednea de comandos de Junos. Este problema afecta a Junos OS: * Todas las versiones anteriores a 21.2R3-S9, * Versiones 21.4 anteriores a 21.4R3-S10, * Versiones 22.2 anteriores a 22.2R3-S6, * Versiones 22.4 anteriores a 22.4R3-S6, * Versiones 23.2 anteriores a 23.2R2-S3, * Versiones 23.4 anteriores a 23.4R2-S4, * Versiones 24.2 anteriores a 24.2R1-S2 y 24.2R2."}], "id": "CVE-2025-21590", "lastModified": "2026-10-01T18:23:34.867", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 4.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 0.8, "impactScore": 3.6, "source": "sirt@juniper.net", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.7, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "sirt@juniper.net", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-21590", "options": [{"exploitation": "active"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-03-14T03:55:21.999597Z", "version": "2.0.3"}}]}, "published": "2025-03-12T14:15:15.447", "references": [{"source": "sirt@juniper.net", "tags": ["Third Party Advisory"], "url": "https://cloud.google.com/blog/topics/threat-intelligence/china-nexus-espionage-targets-juniper-routers"}, {"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://supportportal.juniper.net/JSA93446"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["US Government Resource"], "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21590"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-653"}], "source": "sirt@juniper.net", "type": "Secondary"}]}

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