{"id":"CVE-2026-58736","kind":"vulnerability","aliases":["CVE-2026-58736"],"related":[],"title":"SessionEx.cpp use-after-free lets remote attackers escalate privilege","description":"In NotifySipResponse of SessionEx.cpp, there is a possible way to corrupt memory via a dangling connection pointer in the pending response queue due to a use after free. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.","summary":"In NotifySipResponse of SessionEx.cpp, a dangling connection pointer in the pending response queue causes a use-after-free and memory corruption. The description says a remote attacker can escalate privilege with no extra execution privileges and no user interaction.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["other","sip","voip"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T20:19:24+00:00","first_seen_at":"2026-11-10T20:46:09+00:00","triaged_at":"2026-11-10T20:51:54+00:00","updated_at":"2026-11-10T20:51:54+00:00","category":"other","confidence":0.4,"triage":{"at":"2026-11-10T20:51:54Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"SessionEx.cpp use-after-free lets remote attackers escalate privilege","impact":"high","summary":"In NotifySipResponse of SessionEx.cpp, a dangling connection pointer in the pending response queue causes a use-after-free and memory corruption. The description says a remote attacker can escalate privilege with no extra execution privileges and no user interaction.","audience":"businesses","category":"other","nicknames":[],"who_cares":["sip","voip"],"confidence":0.4,"fix_status":"unknown","needs_auth":"unknown","worst_case":"remote attacker escalates privilege through corrupted memory","analyst_note":"Identify the affected product and vendor from the NVD entry and advisory; the sources list no products, versions or fix.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000644,"input_tokens":4549,"output_tokens":378,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-58736':13A,16A 'addit':98C 'attack':8A,47B 'caus':33B 'connect':26B,75C 'corrupt':41B,70C 'could':89C 'cve':11A,14A 'dangl':25B,74C 'descript':43B 'due':82C 'escal':9A,49B,93C 'execut':54B,99C 'exploit':108C 'extra':53B 'free':5A,38B,87C 'interact':59B,103C 'lead':90C 'let':6A 'memori':40B,71C 'need':101C,106C 'notifysiprespons':21B,61C 'pend':30B,79C 'pointer':27B,76C 'possibl':67C 'privileg':10A,50B,55B,95C,100C 'queue':32B,81C 'remot':7A,46B,92C 'respons':31B,80C 'say':44B 'sessionex.cpp':1A,23B,63C 'sip':18B 'use':3A,36B,85C 'use-after-fre':2A,35B 'user':58B,102C 'via':72C 'voip':19B 'way':68C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["other","sip","unknown","voip"],"campaign_type":null,"search_a":"'-2026':12A,15A '-58736':13A,16A 'attack':8A 'cve':11A,14A 'escal':9A 'free':5A 'let':6A 'privileg':10A 'remot':7A 'sessionex.cpp':1A 'use':3A 'use-after-fre':2A","search_b":"'attack':47B 'caus':33B 'connect':26B 'corrupt':41B 'dangl':25B 'descript':43B 'escal':49B 'execut':54B 'extra':53B 'free':38B 'interact':59B 'memori':40B 'notifysiprespons':21B 'pend':30B 'pointer':27B 'privileg':50B,55B 'queue':32B 'remot':46B 'respons':31B 'say':44B 'sessionex.cpp':23B 'sip':18B 'use':36B 'use-after-fre':35B 'user':58B 'voip':19B","search_c":"'addit':98C 'connect':75C 'corrupt':70C 'could':89C 'dangl':74C 'due':82C 'escal':93C 'execut':99C 'exploit':108C 'free':87C 'interact':103C 'lead':90C 'memori':71C 'need':101C,106C 'notifysiprespons':61C 'pend':79C 'pointer':76C 'possibl':67C 'privileg':95C,100C 'queue':81C 'remot':92C 'respons':80C 'sessionex.cpp':63C 'use':85C 'user':102C 'via':72C 'way':68C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T20:19:24+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-58736","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58736","severity":null,"published_at":"2026-11-10T20:19:24+00:00","modified_at":"2026-11-10T20:19:24+00:00","first_seen_at":"2026-11-10T20:46:09+00:00","fetched_at":"2026-11-10T20:46:09+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}