{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55490 exists.","fix":"No fix has been published for CVE-2026-55490 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-55490 is a medium-severity vulnerability in Openwrt Openwrt, published on 7 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-55490 and fix it if it is affected.\n\nWhat it is: CVE-2026-55490 is a medium-severity vulnerability in Openwrt Openwrt, published on 7 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55490 exists.\n\nAffected product: Openwrt Openwrt. 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-2026-55490/ (Markdown: https://insights.sbomify.com/CVE-2026-55490/index.md)","id":"CVE-2026-55490","markdown":"https://insights.sbomify.com/CVE-2026-55490/index.md","name":"CVE-2026-55490","record":{"aliases":["GHSA-9558-77jp-g3fw"],"analysis":{"component_type":"operating_system","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"OpenWrt embedded OS","requires_auth":"none","summary":"An unauthenticated attacker can crash the Emergency Access Daemon via a crafted UDP packet due to an integer underflow, causing denial of service.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"openwrt","vendor":"openwrt"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-191","name":"Integer Underflow (Wrap or Wraparound)"}],"description":"OpenWrt is a Linux operating system targeting embedded devices. Before v25.12.5, an integer underflow in handle_send_a() of the Emergency Access Daemon allows any unauthenticated attacker on the local network to crash the daemon by sending a single crafted UDP packet. The message length underflows before a bounds check and is then passed to memcpy as a very large size. This issue is fixed v25.12.5.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"OpenWrt: EAD Integer Underflow → Pre-Auth Denial of Service","id":"CVE-2026-55490","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"openwrt:openwrt","products":["openwrt:openwrt"],"type":"integer_overflow","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"BigBlueButton: Stored XSS in Screenshare Recording Playback via Unescaped Meeting Name","id":"CVE-2026-55491"},"packages":[],"prev":{"headline":"BigBlueButton: IDOR on BBB through /api/graphql via POST parameter \"presentationId\" leads to Authentication Bypass","id":"CVE-2026-55489"},"products":["openwrt"],"published":"2026-07-07","related":[{"cvss_score":9.8,"headline":"Use after free in n/a","id":"CVE-2020-28951","kev_date_added":null,"published":"2020-11-19"},{"cvss_score":9.6,"headline":"Cross-site scripting in openwrt","id":"CVE-2026-62948","kev_date_added":null,"published":"2026-07-15"},{"cvss_score":9.5,"headline":"OpenWrt Project has Stack-based Buffer Overflow in DNS PTR Query","id":"CVE-2026-30871","kev_date_added":null,"published":"2026-03-19"},{"cvss_score":9.5,"headline":"OpenWrt Project has a Stack-based Buffer Overflow vulnerability via IPv6 reverse DNS lookup","id":"CVE-2026-30872","kev_date_added":null,"published":"2026-03-19"},{"cvss_score":8.8,"headline":"Command injection in n/a","id":"CVE-2021-28961","kev_date_added":null,"published":"2021-03-21"},{"cvss_score":8.8,"headline":"Cross-site request forgery in n/a","id":"CVE-2019-17367","kev_date_added":null,"published":"2019-10-18"},{"cvss_score":8.8,"headline":"Missing authorization in n/a","id":"CVE-2018-11116","kev_date_added":null,"published":"2018-06-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-08","vendors":["openwrt"]},"summary":"An unauthenticated attacker can crash the Emergency Access Daemon via a crafted UDP packet due to an integer underflow, causing denial of service.","url":"https://insights.sbomify.com/CVE-2026-55490/"}