CVE-2025-59287
CRITICALCVE-2025-59287 is a critical-severity (CVSS 9.8) Deserialization of Untrusted Data vulnerability in microsoft windows server 2012. 10 public exploit references exist, so weaponization risk is real. O3 Security detects and blocks CVE-2025-59287 exploitation at runtime via eBPF exploit-chain detection and L7 egress monitoring, even on unpatched systems.
Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
Exploitation Status
Actively exploited in the wild
- CISA’s SSVC triage classifies this CVE as under active exploitation.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- A successful exploit gives an attacker total control of the affected component, not partial access.
Exploitation and automatability from CISA’s SSVC triage for CVE-2025-59287.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2025-59287 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE sits: patch-first territory.
Where this sits among everything scored
Of 0 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Description
Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
Affected Products
windows server 2012microsoftwindows server 2016microsoftwindows server 2019microsoftwindows server 2022microsoftwindows server 2022 23h2microsoftwindows server 2025microsoftResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
jiansiting/CVE-2025-59287
WSUS Unauthenticated RCE
mubix/Find-WSUS
Helps defenders find their WSUS configurations in the wake of CVE-2025-5
Lupovis/Honeypot-for-CVE-2025-59287-WSUS
Defensive PoC decoy for CVE-2025-59287 (WSUS) - emulates WSUS endpoints,
tecxx/CVE-2025-59287-WSUS
powershell version of hawktrace POC exploit
garvitv14/CVE-2025-59287
Working exploit (PoC) for CVE-2025-59287 — WSUS vulnerability. Featured
M507/CVE-2025-59287-PoC
Unauthenticated RCE PoC in Microsoft Windows Server Update Service (WSUS
QurtiDev/WSUS-CVE-2025-59287-RCE
Exploit script written in C# to aid gaining a reverse shell on targets w
AdityaBhatt3010/CVE-2025-59287-When-your-patch-server-becomes-the-attack-vector
CVE-2025-59287 — Critical unauthenticated RCE in Windows Server Update S
0x7556/CVE-2025-59287
CVE-2025-59287 注入WolfShell内存马
mrk336/Breaking-the-Update-Chain-Inside-CVE-2025-59287-and-the-WSUS-RCE-Threat
CVE-2025-59287 is a critical RCE vulnerability in Windows Server Update
Detection & mitigation playbook
Vendor / applianceDetect
Inventory every microsoft windows server 2012 deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for remote code execution at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.
Fix
Apply the microsoft windows server 2012 security patch or hotfix for CVE-2025-59287 on the affected version, following the vendor advisory for your exact build.
Workarounds
Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.
How O3 protects you
O3 detects and blocks CVE-2025-59287 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.
Tailored to CVE-2025-59287. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2025-59287 being exploited in your environment?
O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2025-59287 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.