{"id":13085,"date":"2015-06-16T18:01:51","date_gmt":"2015-06-16T18:01:51","guid":{"rendered":"https:\/\/one.sightlinemg.com\/federaltimes\/uncategorized\/2015\/06\/16\/timeline-what-happened-when-in-opm-s-data-breach\/"},"modified":"2026-08-08T04:28:14","modified_gmt":"2026-08-08T04:28:14","slug":"timeline-what-happened-when-in-opm-s-data-breach","status":"publish","type":"post","link":"https:\/\/one.sightlinemg.com\/federaltimes\/smr\/opm-data-breach\/2015\/06\/16\/timeline-what-happened-when-in-opm-s-data-breach\/","title":{"rendered":"Timeline: What happened when in OPM&#8217;s data breach"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The Office of Personnel Management has been hacked at least twice, exposing personal information on millions of federal employees, former employees, and possibly others to the malefactors who engineered the successful cyberattacks.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">OPM revealed on June 4 that the agency&#8217;s systems had been compromised and data on at least 4 million federal employees was at risk of exposure. Since then, more revelations have drawn Congressional scrutiny and raised fears among, well, pretty much everyone.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><b>Related: <\/b><a href=\"http:\/\/www.federaltimes.com\/story\/government\/cybersecurity\/2015\/06\/04\/opm-hack-intrusion-cybersecurity\/28495819\/\" title=\"http:\/\/www.federaltimes.com\/story\/government\/cybersecurity\/2015\/06\/04\/opm-hack-intrusion-cybersecurity\/28495819\/\">OPM hack could affect 4 million people<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">While analyzing the initial attack, Investigators discovered a second breach probably exposed highly sensitive information contained the files of federal employees \u2014 and even prospective employees \u2014 who underwent background investigations for security clearances.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><b>Related: <\/b><a href=\"http:\/\/www.federaltimes.com\/story\/government\/cybersecurity\/2015\/06\/15\/second-opm-hack\/71248268\/\" title=\"http:\/\/www.federaltimes.com\/story\/government\/cybersecurity\/2015\/06\/15\/second-opm-hack\/71248268\/\">Second OPM hack exposed highly personal background info<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Here, then, is a timeline to help keep track of the sequence of events in this unfolding story.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"2532\" height=\"1809\" src=\"\/wp-content\/uploads\/2026\/08\/636015991064288050-anti-subjpg.jpg\" alt=\"\" class=\"wp-image-27714\" srcset=\"https:\/\/one.sightlinemg.com\/wp-content\/uploads\/2026\/08\/636015991064288050-anti-subjpg.jpg 2532w, https:\/\/one.sightlinemg.com\/wp-content\/uploads\/2026\/08\/636015991064288050-anti-subjpg.jpg?resize=300,214 300w, https:\/\/one.sightlinemg.com\/wp-content\/uploads\/2026\/08\/636015991064288050-anti-subjpg.jpg?resize=768,549 768w, https:\/\/one.sightlinemg.com\/wp-content\/uploads\/2026\/08\/636015991064288050-anti-subjpg.jpg?resize=1024,732 1024w, https:\/\/one.sightlinemg.com\/wp-content\/uploads\/2026\/08\/636015991064288050-anti-subjpg.jpg?resize=1536,1097 1536w, https:\/\/one.sightlinemg.com\/wp-content\/uploads\/2026\/08\/636015991064288050-anti-subjpg.jpg?resize=2048,1463 2048w\" sizes=\"auto, (max-width: 2532px) 100vw, 2532px\" \/><figcaption class=\"wp-element-caption\">AQS-24<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>The successful intrusion that happened undetected last year continues to reverberate.<\/p>\n","protected":false},"author":7,"featured_media":38039,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_meta-robots-nofollow":"","_yoast_wpseo_canonical":"","_acf":"","_yoast_wpseo_primary_category":91,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","_smg_distribution_targets":[]},"categories":[15,28,91],"tags":[],"coauthors":[2349,1333],"class_list":["post-13085","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-management","category-smr","category-opm-data-breach"],"acf":{"subheadline":"","legacy_arc_id":"GPIYMA3E3VFWLOBCXVS6CMLTPU","arc_canonical_url":"\/smr\/opm-data-breach\/2015\/06\/16\/timeline-what-happened-when-in-opm-s-data-breach\/","remove_feature_photo":false,"is_sponsored":false,"subtype":"","redirect_url":"","disable_inline_ads":false,"native_logo_pretext":"Presented By:"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.0 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Timeline: What happened when in OPM&#039;s data breach - Federal Times<\/title>\n<meta name=\"description\" content=\"The successful intrusion that happened undetected last year continues to reverberate.\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Timeline: What happened when in OPM&#039;s data breach\" \/>\n<meta property=\"og:description\" content=\"The successful intrusion that happened undetected last year continues to reverberate.\" \/>\n<meta property=\"og:url\" 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