{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/cpes/cpe2.3amicrosoftexchange_server2016cumulative_update_16/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":["cpe:2.3:a:microsoft:exchange_server:2016:-:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_1:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_10:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_11:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_12:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_13:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_14:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_15:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_16:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_17:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_18:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_19:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_2:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_20:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_22:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_23:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_3:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_4:*:*:*:*:*:*","cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_5:*:*:*:*:*:*"],"_cs_cves":[{"cvss":8.1,"id":"CVE-2026-42897"}],"_cs_exploited":false,"_cs_has_poc":true,"_cs_poc_references":[],"_cs_products":["Exchange Server","Exchange Server 2016","Exchange Server 2019","Exchange Server Subscription Edition (SE)","Outlook Web Access","Microsoft Outlook Web Access (\u003c= 2026-05)","Zimbra Collaboration Suite"],"_cs_severities":["medium"],"_cs_tags":["xss","spoofing","exchange"],"_cs_type":"advisory","_cs_vendors":["Microsoft","Zimbra"],"content_html":"\u003cp\u003eCVE-2026-42897 is a cross-site scripting (XSS) vulnerability affecting Microsoft Exchange Server. This vulnerability stems from improper neutralization of input during web page generation. An attacker can exploit this flaw to inject malicious scripts into web pages served by the Exchange Server, potentially leading to spoofing attacks against users. Successful exploitation could allow an attacker to impersonate legitimate users, steal sensitive information, or perform unauthorized actions on behalf of a user. This vulnerability requires prompt attention from security teams to prevent potential damage and maintain the integrity of Exchange Server environments.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker identifies a vulnerable endpoint within Microsoft Exchange Server susceptible to XSS.\u003c/li\u003e\n\u003cli\u003eAttacker crafts a malicious script designed to perform a spoofing attack.\u003c/li\u003e\n\u003cli\u003eAttacker injects the malicious script into a web page served by the Exchange Server, potentially via a crafted URL or form input.\u003c/li\u003e\n\u003cli\u003eA legitimate user accesses the compromised web page.\u003c/li\u003e\n\u003cli\u003eThe user's browser executes the injected script.\u003c/li\u003e\n\u003cli\u003eThe script modifies the content of the web page to spoof a trusted interface or request user credentials.\u003c/li\u003e\n\u003cli\u003eThe user, believing the spoofed content is legitimate, interacts with the malicious script, potentially providing sensitive information.\u003c/li\u003e\n\u003cli\u003eThe attacker captures the user's credentials or other sensitive data.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-42897 can result in unauthorized access to sensitive information, impersonation of legitimate users, and potential compromise of the Exchange Server environment. The spoofing attacks can mislead users into divulging credentials or performing actions that benefit the attacker. Given the widespread use of Microsoft Exchange Server, a successful attack could affect numerous organizations and individuals, leading to significant data breaches and financial losses.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDeploy the Sigma rule provided below to detect potential exploitation attempts of CVE-2026-42897 by monitoring for suspicious script injections in HTTP requests to Exchange Server.\u003c/li\u003e\n\u003cli\u003eEnsure Microsoft Exchange Server is updated with the latest security patches to address CVE-2026-42897.\u003c/li\u003e\n\u003cli\u003eImplement input validation and output encoding mechanisms to prevent XSS vulnerabilities in web applications.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-07-29T15:03:22Z","date_published":"2026-05-14T17:03:19Z","id":"https://feed.craftedsignal.io/briefs/2026-05-exchange-xss/","summary":"CVE-2026-42897 is a cross-site scripting (XSS) vulnerability in Microsoft Exchange Server that allows an attacker to perform spoofing attacks by injecting malicious scripts into web pages.","title":"CVE-2026-42897 Microsoft Exchange Server Cross-Site Scripting Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-05-exchange-xss/"}],"language":"en","title":"CraftedSignal Threat Feed - Cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_16:*:*:*:*:*:*","version":"https://jsonfeed.org/version/1.1"}