{"id":79358,"date":"2025-09-29T18:54:31","date_gmt":"2025-09-29T18:54:31","guid":{"rendered":""},"modified":"2025-10-09T23:20:44","modified_gmt":"2025-10-10T05:20:44","slug":"cve-2025-26399-unauthenticated-ajaxproxy-deserialization-remote-code-execution-vulnerability-in-solarwinds-web-help-desk","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-26399-unauthenticated-ajaxproxy-deserialization-remote-code-execution-vulnerability-in-solarwinds-web-help-desk\/","title":{"rendered":"CVE-2025-26399: Unauthenticated AjaxProxy Deserialization Remote Code Execution Vulnerability in SolarWinds Web Help Desk<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

In the ever-evolving world of cybersecurity, no software is immune to vulnerabilities. SolarWinds Web Help Desk, a popular IT service management solution, was recently found to be susceptible to a critical vulnerability identified as CVE-2025-26399. This vulnerability is a patch bypass<\/a> of two previous vulnerabilities CVE-2024-28988 and CVE-2024-28986, signifying its severity and potential impact. The risk it poses to systems and data<\/a> security makes it an issue of high importance that requires immediate attention by system administrators and IT security personnel.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-26399
\nSeverity: Critical (9.8)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: System compromise<\/a> or data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

SolarWinds Web Help Desk | All versions prior to the patch<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The vulnerability stems from a flaw in the AjaxProxy deserialization process, which allows unauthenticated users to execute arbitrary commands remotely<\/a> on the host machine. Specifically, an attacker can craft a malicious serialized object that, when deserialized by the AjaxProxy, triggers a chain of events leading to the execution of arbitrary code<\/a>. Since the vulnerability can be exploited without any form of authentication<\/a>, it opens a wide attack surface that can be leveraged by attackers to compromise the system or exfiltrate sensitive data.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Here is a conceptual example of how an attacker might exploit this vulnerability, using a POST request to send a malicious payload to a vulnerable<\/a> endpoint:<\/p>\n

POST \/ajaxproxy HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ \"serialized_object\": \"malicious_payload\" }<\/code><\/pre>\n
In this example, “malicious_payload” represents a serialized object crafted to exploit the deserialization vulnerability<\/a> in the AjaxProxy. This payload, when processed by the vulnerable application, can lead to execution of arbitrary<\/a> commands on the host machine.<\/p>\n
Mitigation and Patching<\/strong><\/p>\n
SolarWinds has released a patch to address this critical vulnerability<\/a>. It is strongly advised that system administrators apply this patch as soon as possible<\/a> to prevent potential attacks. In case immediate patching is not feasible, implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure. However, these should not be seen as long-term solutions, as they may not fully prevent the exploitation of this vulnerability.
\nIt is crucial to keep in mind that vulnerabilities like CVE-2025-26399 highlight the importance of regular patching and updating of software systems<\/a>. Cybersecurity is an ongoing process, and staying ahead of potential threats is key to maintaining a secure IT environment.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview In the ever-evolving world of cybersecurity, no software is immune to vulnerabilities. SolarWinds Web Help Desk, a popular IT service management solution, was recently found to be susceptible to a critical vulnerability identified as CVE-2025-26399. This vulnerability is a patch bypass of two previous vulnerabilities CVE-2024-28988 and CVE-2024-28986, signifying its severity and potential impact. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-79358","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-rce"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t