{"vulnerability": "CVE-2026-53921", "sightings": [{"uuid": "8642cd44-7270-49d3-8315-bae354143689", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-53921", "type": "seen", "source": "https://bsky.app/profile/thedailytechfeed.com/post/3mrpi4ffu7a2v", "content": "OpenWrt fixes critical DHCPv6 flaw (CVE-2026-53921) allowing unauthenticated code execution. Update to version 24.10.8 now. #OpenWrt #SecurityUpdate #CVE202653921 #DHCPv6 #NetworkSecurity thedailytechfeed.com/critical-ope...", "creation_timestamp": "2026-07-28T13:07:19.258903Z"}, {"uuid": "c21143e5-9919-4241-af64-0670609d123a", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-53921", "type": "seen", "source": "https://bsky.app/profile/postac001.bsky.social/post/3mrpmp3yu3d2v", "content": "OpenWrt 24.10.8 \u3067\u3001\u672a\u8a8d\u8a3c\u306e\u653b\u6483\u8005\u304c root \u6a29\u9650\u3067\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3067\u304d\u308b DHCPv6 \u8106\u5f31\u6027\uff08CVE-2026-53921\uff09\u304c\u4fee\u6b63\u3055\u308c\u305f\u3002", "creation_timestamp": "2026-07-28T14:29:22.162827Z"}, {"uuid": "5fe4f376-e6c7-48b7-bd00-e03cff1a34f8", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-53921", "type": "seen", "source": "https://bsky.app/profile/newssecia.bsky.social/post/3mrpocpugbh2h", "content": "\ud83e\udd16 CVE-2026-53921 (CVSS 9.8): Critical unauthenticated DHCPv6 stack overflow in OpenWrt odhcpd allows RCE as root. OpenWrt 24.10.8 released.\nhttps://thehackernews.com/2026/07/critical-openwrt-dhcpv6-flaw-could-let.html", "creation_timestamp": "2026-07-28T14:58:13.340467Z"}, {"uuid": "e58232c9-bed8-48f1-824f-a429ed2d1ef3", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-53921", "type": "seen", "source": "https://t.me/GithubRedTeam/95541", "content": "\ud83d\udea8 GitHub \u76d1\u63a7\u6d88\u606f\u63d0\u9192\n\n\ud83d\udea8 \u53d1\u73b0\u5173\u952e\u8bcd\uff1a #CVE-2026 #RCE\n\n\ud83d\udce6 \u9879\u76ee\u540d\u79f0\uff1a CVE-2026-53921\n\ud83d\udc64 \u9879\u76ee\u4f5c\u8005\uff1a 0xBlackash\n\ud83d\udee0 \u5f00\u53d1\u8bed\u8a00\uff1a Python\n\u2b50 Star\u6570\u91cf\uff1a 0  |  \ud83c\udf74 Fork\u6570\u91cf\uff1a 0\n\ud83d\udcc5 \u66f4\u65b0\u65f6\u95f4\uff1a 2026-07-28 14:48:04\n\n\ud83d\udcdd \u9879\u76ee\u63cf\u8ff0\uff1a\nCVE-2026-53921\n\n\ud83d\udd17 \u70b9\u51fb\u8bbf\u95ee\u9879\u76ee\u5730\u5740", "creation_timestamp": "2026-07-28T16:00:08.707991Z"}, {"uuid": "f2e1d530-03a1-4a3a-97fb-47f3ad478582", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-53921", "type": "seen", "source": "https://thehackernews.com/2026/07/critical-openwrt-dhcpv6-flaw-could-let.html", "content": "OpenWrt has shipped version 24.10.8 to close a critical DHCPv6 stack overflow and a wider set of remotely triggerable flaws in network services enabled by default.\n\nThe critical issue, tracked as CVE-2026-53921 and rated 9.8 on CVSS 3.1 in OpenWrt's GitHub advisory, lets an unauthenticated attacker able to reach the DHCPv6 server overwrite a stack buffer in odhcpd through a crafted DHCPv6", "creation_timestamp": "2026-07-28T16:00:46.761997Z"}]}