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Mallory
Medium

Out-of-bounds Write in FortiADC

IdentifiersCVE-2025-48839CWE-787· Out-of-bounds Write

CVE-2025-48839 is an out-of-bounds write vulnerability in FortiADC. According to the provided content, affected versions are FortiADC 8.0.0, 7.6.0 through 7.6.2, 7.4.0 through 7.4.7, and all versions of 7.2, 7.1, 7.0, and 6.2. The flaw can be triggered by an authenticated attacker via specially crafted HTTP requests, and may result in arbitrary code execution. No additional detail about the specific vulnerable function or code path is provided in the supplied material.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation may allow arbitrary code execution in the context of the affected FortiADC service. This could enable an authenticated attacker to install programs, manipulate or delete data, create accounts, or otherwise fully compromise the affected appliance or its application context, depending on the privileges of the vulnerable process.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure of the FortiADC management and application interfaces to trusted networks only, restrict access to authenticated users with least privilege, monitor for anomalous or malformed HTTP requests, and implement network segmentation and compensating controls such as WAF or reverse-proxy filtering where feasible. Increased logging, alerting, and review of administrative activity are also advisable until remediation is completed.

Remediation

Patch, then assume compromise.

Upgrade FortiADC to a fixed release provided by Fortinet. The supplied content identifies the affected versions as 8.0.0, 7.6.0 through 7.6.2, 7.4.0 through 7.4.7, and all versions of 7.2, 7.1, 7.0, and 6.2; organizations should move to a vendor-remediated version outside those ranges in accordance with Fortinet's advisory. Apply normal patch-management validation and prioritize internet-exposed and high-value administrative interfaces.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
FortinetFortiadchardware

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What this page doesn’t show

The version that knows your environment.

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity1

Community discussion across Reddit, Mastodon, and other social sources.