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Privilege Escalation in F5OS-A and F5OS-C

IdentifiersCVE-2025-57780CWE-269

CVE-2025-57780 is a privilege escalation vulnerability affecting F5OS-A and F5OS-C systems. According to the provided content, the flaw may allow an authenticated attacker with local access to escalate privileges and cross a security boundary, with higher severity when the system is operating in appliance mode. F5 advisory K000156771 describes it as a control-plane issue and notes that it does not affect the data plane. The specific vulnerable function or root cause is not 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 an authenticated local attacker to gain elevated privileges on the affected F5OS system and cross a security boundary. In appliance mode, this has increased severity because appliance-mode restrictions are intended to constrain access. The issue affects the control plane and could undermine administrative isolation on F5 rSeries or VELOS environments running vulnerable F5OS-A or F5OS-C versions.

Mitigation

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

The provided advisory states there is no viable mitigation that allows continued user access. The only mitigation is to remove access for users who are not completely trusted until the system can be upgraded.

Remediation

Patch, then assume compromise.

Upgrade to a fixed version listed by F5 in advisory K000156771. Based on the provided content, fixed versions include F5OS-A 1.8.3 or later and F5OS-C 1.8.2 or later; if the deployed branch does not contain a fix, upgrade to a branch that does. The content also references affected ranges including F5OS-A 1.5.1 through 1.5.3 and F5OS-C 1.8.0 through 1.8.1 and 1.6.0 through 1.6.2, with subsequent fixed releases noted in the advisory tables. End-of-Technical-Support versions were not evaluated.
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
F5F5os-Aoperating_system
F5F5os-Coperating_system

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What this page doesn’t show

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Exposure mapping

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Threat actor evidence

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Associated malware

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Detection signatures

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Vendor-by-vendor mapping

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

Social activity

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