{"id":"CVE-2026-76479","kind":"vulnerability","aliases":["CVE-2026-76479"],"related":[],"title":"Cisco Unified Communications products: path traversal flaw in hardening release","description":"As part of Cisco's ongoing commitment to proactive security and product quality, engineering teams for Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), and Cisco Unity Connection have conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.\r\n\r\nThe vulnerabilities tracked by CVE-2026-76479 are related to issues concerning improper limitation of a pathname to a restricted directory that are grouped under the Common Weakness Enumeration (CWE) Base CWE-22.","summary":"Cisco's October 2026 hardening release for Emergency Responder, Prime Collaboration Deployment, Unified CM, IM&P, SME and Unity Connection fixes several internally found path traversal flaws (CWE-22), grouped under one CVE. NVD scores it 7.8 (local, low privileges). Cisco says it found them in internal testing, knows of no exploitation, and offers no workarounds.","severity":"high","cvss":7.8,"epss":0.0019,"exploited":false,"exploited_at":null,"products":[{"name":"Cisco Unified Communications Manager","fixed":["15SU5"],"affected":"14, 15 before 15SU5","ecosystem":"vendor"},{"name":"Cisco Unity Connection","fixed":["15SU5"],"affected":"14, 15 before 15SU5","ecosystem":"vendor"},{"name":"Cisco Emergency Responder","fixed":["15SU5"],"affected":"14, 15 before 15SU5","ecosystem":"vendor"}],"ecosystems":[],"tags":["cisco","emergency-responder","infrastructure","on-prem","prime-collaboration-deployment","unified-cm","unified-communications","unity-connection"],"not_affected_if":[],"how_to_check":"Cisco gives no config test: all listed products are affected regardless of configuration. Check the installed version (e.g. 'show version active' on the CLI or the admin page) and compare it with 15SU5; any 14.x is affected.","fix":"Upgrade release 15 to 15SU5. Release 14 has no fix: migrate to a fixed release (15SU5). No workarounds.","status":"open","published_at":"2026-10-21T17:19:07+00:00","first_seen_at":"2026-10-23T21:57:29+00:00","triaged_at":"2026-10-25T03:08:22+00:00","updated_at":"2026-10-25T03:22:54+00:00","category":"infrastructure","confidence":0.8,"triage":{"at":"2026-10-25T03:08:22Z","model":"claude-haiku-5-5","output":{"fix":"- Move Cisco Emergency Responder, Prime Collaboration Deployment, Unified CM, Unified CM IM&P, Unified CM SME and Unity Connection to the fixed release named in Cisco's advisory (version unknown from these sources)","reach":"unknown","title":"Cisco Unified Communications products: path traversal flaw in hardening release","impact":"high","summary":"Several Cisco Unified Communications products, including Unified CM, Unity Connection and Emergency Responder, contain path traversal flaws (CWE-22) that Cisco fixed in a hardening release. NVD scores the issue 7.8 (high), and the sources do not say what an attacker can read or write through it.","category":"infrastructure","nicknames":[],"who_cares":["cisco","unified-communications","unified-cm","unity-connection","on-prem"],"confidence":0.4,"needs_auth":"unknown","worst_case":"unknown; path traversal may expose or overwrite files on the server","analyst_note":"Find the Cisco security advisory for CVE-2026-76479 to get affected and fixed versions, required privileges, and reachable endpoints; the sources give only the CWE and CVSS score.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Organizations running the listed Cisco Unified Communications products. The sources do not say which versions are vulnerable or which features expose the flaw, so the exact scope is unknown.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000626,"input_tokens":3537,"output_tokens":544,"severity_before":"high"},"analyst_status":"done","analyst_note":"Find the Cisco security advisory for CVE-2026-76479 to get affected and fixed versions, required privileges, and reachable endpoints; the sources give only the CWE and CVSS score.","search":"'-2026':12A,15A,183C '-22':76B,210C '-76479':13A,16A,184C '2026':51B '7.8':84B 'address':173C 'base':208C 'cisco':1A,17A,21A,24A,27B,48B,88B,107C,120C,123C,127C,133C,144C,155C 'cm':41B,61B,132C,141C,152C 'collabor':37B,58B,125C 'commit':110C 'common':204C 'communic':3A,44B,129C,135C,146C 'communications':19A 'comprehens':161C 'concern':189C 'conduct':159C 'connect':47B,67B,157C 'connection':23A 'cve':11A,14A,80B,182C 'cwe':75B,207C,209C 'deploy':38B,59B,126C 'directori':198C 'discov':176C 'edit':150C 'emerg':29B,55B,121C 'emergency':25A 'emergency-respond':28B 'engin':117C 'enumer':206C 'exploit':99B 'fix':68B 'flaw':7A,74B 'found':71B,91B 'group':77B,201C 'harden':9A,52B,170C 'im':62B,137C,142C 'improp':190C 'infrastructur':31B 'intern':70B,94B,162C,175C 'issu':188C 'know':96B 'limit':191C 'local':85B 'low':86B 'manag':130C,136C,147C,149C 'manager':20A 'multipl':174C 'nvd':81B 'octob':50B 'offer':101B 'on-prem':32B 'one':79B 'ongo':109C 'p':63B,143C 'part':105C 'path':5A,72B 'pathnam':194C 'prem':34B 'presenc':138C 'prime':36B,57B,124C 'prime-collaboration-deploy':35B 'privileg':87B 'proactiv':112C 'product':4A,115C 'qualiti':116C 'relat':186C 'releas':10A,53B,171C 'respond':30B,56B,122C 'responder':26A 'restrict':197C 'result':167C 'review':164C,166C 'say':89B 'score':82B 'secur':113C,163C 'servic':139C 'session':148C 'sever':69B 'sme':64B,153C 'softwar':169C 'team':118C 'test':95B 'track':180C 'travers':6A,73B 'unifi':2A,40B,43B,60B,128C,131C,134C,140C,145C,151C 'unified':18A 'unified-cm':39B 'unified-commun':42B 'uniti':46B,66B,156C 'unity':22A 'unity-connect':45B 'vulner':177C,179C 'weak':205C 'workaround':103B","nicknames":[],"mitigations":[],"who_affected":"Any on-prem Cisco Unified CM, Unified CM IM&P, Unified CM SME, Unity Connection, Emergency Responder or Prime Collaboration Deployment on release 14 or on 15 earlier than 15SU5 is affected, whatever its configuration. NVD rates it local with low privileges, so an attacker needs an account on the system. Teams without these Cisco voice products can skip it.","tier":"B","verified":{"fix":{"at":"2026-10-25T03:22:54Z","by":"analyst","run_id":701},"products":{"at":"2026-10-25T03:22:54Z","by":"analyst","run_id":701},"workarounds":{"at":"2026-10-25T03:22:54Z","by":"analyst","run_id":701},"who_affected":{"at":"2026-10-25T03:22:54Z","by":"analyst","run_id":701}},"analyst_revisit_at":null,"first_public_at":"2026-10-21T17:19:07+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"psirt@cisco.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-76479","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-76479","severity":null,"published_at":"2026-10-21T17:19:07+00:00","modified_at":"2026-10-22T23:19:08+00:00","first_seen_at":"2026-10-23T21:57:29+00:00","fetched_at":"2026-10-23T22:29:01+00:00","note":null},{"source":"epss","external_id":"CVE-2026-76479","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-76479","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T13:15:54+00:00","fetched_at":"2026-10-24T13:15:54+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-76479:701","url":null,"severity":null,"published_at":"2026-10-25T03:22:54+00:00","modified_at":"2026-10-25T03:22:54+00:00","first_seen_at":"2026-10-25T03:22:54+00:00","fetched_at":"2026-10-25T03:22:54+00:00","note":"Read Cisco advisory cisco-sa-voice-hardening-twgbH9e3 (Oct 21 2026): CVE-2026-76479 is the CWE-22 grouping (max CVSS 7.8) of 8 CVEs in one hardening release; internally found, no known exploitation, no workarounds. Affected regardless of config; release 15 fixed in 15SU5, release 14 has no fix (migrate). Cisco gives no endpoint or privilege detail; NVD vector is local/low-priv."}],"documents":[{"id":1444,"url":"https://www.cisco.com/c/en/us/support/docs/csa/cisco-sa-voice-hardening-twgbH9e3.html","title":"Cisco Unified Communications Products Security Hardening Release: October 2026","kind":"advisory","source":"analyst","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":null},{"id":3136,"url":"https://www.cve.org/CVERecord?id=CVE-2026-76479","title":"CVE Record: CVE-2026-76479","kind":"other","source":"analyst","text":null,"published_at":null,"relation":"describes","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"}