{"id":"CVE-2026-104353","kind":"vulnerability","aliases":["CVE-2026-104353"],"related":[],"title":"Adobe Campaign Classic: OS command injection lets low-privilege users run code","description":"Adobe Campaign Classic (ACC) is affected by an Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability that could result in arbitrary code execution in the context of the current user. A low-privileged attacker could exploit this vulnerability to execute arbitrary code. Exploitation of this issue does not require user interaction. Scope is changed.","summary":"Adobe Campaign Classic has an OS command injection flaw in which special characters are not neutralized before being passed to a system command. A low-privileged attacker can run arbitrary code in the context of the current user, without user interaction.","severity":"critical","cvss":9.9,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Adobe Campaign Classic","fixed":["7.4.4 build 9403"],"affected":"ACC v7 <= 7.4.4 build 9402","ecosystem":"vendor"}],"ecosystems":[],"tags":["adobe-campaign-classic","authenticated","on-premise","os-command-injection","rce","self-hosted","vendor"],"not_affected_if":["adobe-hosted","managed-hosting"],"how_to_check":"Check your Campaign Classic build number (console Help > About, or server build). 7.4.4 build 9402 and earlier is affected; build 9403 or later is fixed.","fix":"Update Adobe Campaign Classic v7 to 7.4.4 build 9403 or later (Windows, Linux), then restart the Campaign server (nlserver) to load the build; the fix is active by default once restarted.","status":"open","published_at":"2026-10-27T17:16:55+00:00","first_seen_at":"2026-10-27T17:32:44+00:00","triaged_at":"2026-10-27T17:34:10+00:00","updated_at":"2026-10-27T17:38:24+00:00","category":"vendor","confidence":0.85,"triage":{"at":"2026-10-27T17:34:10Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"unknown","title":"Adobe Campaign Classic: OS command injection lets low-privilege users run code","impact":"high","summary":"Adobe Campaign Classic has an OS command injection flaw in which special characters are not neutralized before being passed to a system command. A low-privileged attacker can run arbitrary code in the context of the current user, without user interaction.","category":"vendor","nicknames":[],"who_cares":["adobe-campaign-classic"],"confidence":0.5,"needs_auth":"yes","worst_case":"Attacker runs arbitrary code as the Campaign service user.","analyst_note":"Find Adobe's bulletin for CVE-2026-104353 to get affected and fixed ACC versions, the vulnerable feature, and whether the attack is network-reachable.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000515,"input_tokens":3353,"output_tokens":359,"severity_before":"critical"},"analyst_status":"done","analyst_note":"Find Adobe's bulletin for CVE-2026-104353 to get affected and fixed ACC versions, the vulnerable feature, and whether the attack is network-reachable.","search":"'-104353':16A,19A '-2026':15A,18A 'acc':85C 'adob':1A,24B,40B,82C 'adobe':20A 'adobe-campaign-class':23B 'affect':87C 'arbitrari':70B,108C,129C 'attack':67B,122C 'authent':27B 'campaign':2A,21A,25B,41B,83C 'chang':142C 'charact':52B 'classic':3A,22A,26B,42B,84C 'code':13A,71B,109C,130C 'command':5A,33B,46B,62B,99C,101C 'context':74B,113C 'could':105C,123C 'current':77B,116C 'cve':14A,17A 'element':94C 'execut':110C,128C 'exploit':124C,131C 'flaw':48B 'host':38B 'improp':90C 'inject':6A,34B,47B,102C 'interact':81B,139C 'issu':134C 'let':7A 'low':9A,65B,120C 'low-privileg':8A,64B,119C 'neutral':55B,91C 'on-premis':28B 'os':4A,32B,45B,98C,100C 'os-command-inject':31B 'pass':58B 'premis':30B 'privileg':10A,66B,121C 'rce':35B 'requir':137C 'result':106C 'run':12A,69B 'scope':140C 'self':37B 'self-host':36B 'special':51B,93C 'system':61B 'use':95C 'user':11A,78B,80B,117C,138C 'vendor':39B 'vulner':103C,126C 'without':79B","nicknames":[],"mitigations":[],"who_affected":"Self-managed (on-premise and hybrid) Adobe Campaign Classic v7 servers on build 9402 or earlier are exposed to any authenticated low-privileged user, who can run OS commands as the Campaign service account over the network with no user interaction. Adobe-hosted instances are already remediated per Adobe's release notes. The specific vulnerable feature is not named by Adobe.","tier":"B","verified":{"fix":{"at":"2026-10-27T17:38:24Z","by":"analyst","run_id":899},"products":{"at":"2026-10-27T17:38:24Z","by":"analyst","run_id":899}},"analyst_revisit_at":null,"first_public_at":"2026-10-27T17:16:55+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cvss_by":"psirt@adobe.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-104353","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-104353","severity":null,"published_at":"2026-10-27T17:16:55+00:00","modified_at":"2026-10-27T17:16:55+00:00","first_seen_at":"2026-10-27T17:32:44+00:00","fetched_at":"2026-10-27T17:32:44+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-104353:899","url":null,"severity":null,"published_at":"2026-10-27T17:38:24+00:00","modified_at":"2026-10-27T17:38:24+00:00","first_seen_at":"2026-10-27T17:38:24+00:00","fetched_at":"2026-10-27T17:38:24+00:00","note":"Adobe APSB26-162 (Oct 27 2026, priority 2) lists this CVE: CWE-78, CVSS 9.9 AV:N/PR:L, ACC v7 <= 7.4.4 build 9402 affected, fixed in 7.4.4 build 9403. Adobe: no known exploits. Vulnerable feature/endpoint not named in the bulletin; no workaround listed. Release notes say restart nlserver, Adobe-hosted already remediated."}],"documents":[{"id":7188,"url":"https://www.adobe.com/trust/security/products/campaign/apsb26-162.html","title":"Adobe APSB26-162: Security update available for Adobe Campaign Classic","kind":"advisory","source":"analyst","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":null},{"id":7181,"url":"https://experienceleague.adobe.com/en/docs/campaign-classic/using/release-notes/latest-release","title":"Adobe Campaign Classic v7 release notes (builds 9402, 9403)","kind":"release","source":"analyst","text":null,"published_at":null,"relation":"fix","confidence":null,"note":null}],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}