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Privilege Escalation in Confidential Azure Container Instances via External Control of File Name or Path

IdentifiersCVE-2025-59291CWE-73· External Control of File Name or…

CVE-2025-59291 is an elevation of privilege vulnerability affecting Confidential Azure Container Instances. According to the provided content, the flaw is caused by external control of a file name or path, indicating that attacker-influenced path or filename handling within the container environment can be abused. The available information states that an authorized or privileged attacker can exploit this issue locally within the container environment to elevate privileges. No public technical details were provided in the supplied content regarding the specific vulnerable component, function, code path, affected versions, or exact exploitation sequence.

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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 allows a local attacker with existing authorized or privileged access in the Confidential Azure Container Instances environment to elevate privileges. Based on the available description, this could permit execution with higher privileges than originally granted inside the containerized confidential computing context, potentially enabling access to protected resources or operations otherwise restricted to a more privileged security boundary. The supplied content does not provide further verified detail on cross-container, host-level, or tenant-to-tenant impact.

Mitigation

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

Where immediate remediation cannot be verified, reduce exposure by minimizing privileged access within Confidential Azure Container Instances, enforcing least privilege for users and workloads, restricting local administrative or shell access into containers, validating and constraining file path and filename inputs handled by applications, and monitoring for anomalous privilege changes or abuse within the container environment. The provided content does not include any Microsoft-published workaround or temporary mitigation specific to this CVE.

Remediation

Patch, then assume compromise.

Apply the Microsoft security update or service-side remediation for CVE-2025-59291 in Confidential Azure Container Instances as provided by Microsoft. Because the available content does not include affected version boundaries, patch identifiers, or configuration-specific guidance, defenders should consult the relevant Microsoft Security Response Center advisory and Azure service update documentation to confirm remediation status and any required customer actions.
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
Microsoft CorporationAzure Compute Galleryapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

2 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

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 activity

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

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2025-59291
NVD
nvd.nist.gov/vuln/detail/CVE-2025-59291
MITRE CWE · CWE-73
External Control of File Name or Path
Vendor Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59291