{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49494 exists.","fix":"No fix has been published for CVE-2026-49494 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-49494 is a high-severity vulnerability in Xcitium Comodo Internet Security, published on 7 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-49494 and fix it if it is affected.\n\nWhat it is: CVE-2026-49494 is a high-severity vulnerability in Xcitium Comodo Internet Security, published on 7 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49494 exists.\n\nAffected product: Xcitium Comodo Internet Security. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-49494/ (Markdown: https://insights.sbomify.com/CVE-2026-49494/index.md)","id":"CVE-2026-49494","markdown":"https://insights.sbomify.com/CVE-2026-49494/index.md","name":"CVE-2026-49494","record":{"aliases":["GHSA-87cf-mxjw-fmjh"],"analysis":{"component_type":"operating_system","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Windows security software","requires_auth":"none","summary":"Remote attackers can crash Windows systems via crafted IPv6 packets due to an integer underflow in the firewall driver, affecting Xcitium and Comodo security products.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-191","name":"Integer Underflow (Wrap or Wraparound)"}],"description":"Xcitium Client Security (XCS) before 13.8.2.10019 and Comodo Internet Security (CIS) through 12.3.4.8162 (fix expected by 2026 Q3) contain an integer underflow vulnerability in the firewall driver Inspect.sys that allows remote unauthenticated attackers to crash the system by sending a crafted IPv6 packet with a declared payload length smaller than the sum of its extension-header lengths. The unsigned 64-bit payload-length value underflows to a near-maximal integer, triggering an out-of-bounds read and oversized memcpy in the Windows kernel at DISPATCH_LEVEL, resulting in a blue screen of death even on hosts with all ports blocked.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"Xcitium Client Security / Comodo Internet Security Remote Denial of Service","id":"CVE-2026-49494","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"Ghidra 10.2 \u003c 12.1 - Denial of Service via Circular Reference in Mach-O Export Trie Parser","id":"CVE-2026-49495"},"packages":[],"prev":{"headline":"Markdown Preview Enhanced Arbitrary Code Execution via Bitfield interpretJS()","id":"CVE-2026-49493"},"products":["Comodo Internet Security","Xcitium Client Security (XCS)"],"published":"2026-06-07","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-23","vendors":["Xcitium","Xcitium (formerly Comodo Security Solutions)"]},"summary":"Remote attackers can crash Windows systems via crafted IPv6 packets due to an integer underflow in the firewall driver, affecting Xcitium and Comodo security products.","url":"https://insights.sbomify.com/CVE-2026-49494/"}