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CVE-2016-9256

In F5 BIG-IP 12.1.0 through 12.1.2, permissions enforced by iControl can lag behind the actual...

7.5 High

CVE-2016-9256 is a high vulnerability (CVSS 7.5) in F5 Big-ip, published May 9, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.04%, the 64th percentile. No source names a fixed version.

In F5 BIG-IP 12.1.0 through 12.1.2, permissions enforced by iControl can lag behind the actual permissions assigned to a user if the role_map is not reloaded between the time the permissions are changed and the time of the user's next request. This is a race condition that occurs rarely in normal usage; the typical period in which this is possible is limited to at most a few seconds after the permission change.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

1.04%Up 0.2 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 7.5

In F5 BIG-IP 12.1.0 through 12.1.2, permissions enforced by iControl can lag behind the actual permissions assigned to a user if the role_map is not reloaded between the time the permissions are changed and the time of the user's next request. This is a race condition that occurs rarely in normal usage; the typical period in which this is possible is limited to at most a few seconds after the permission change.

Record
CVE-2016-9256
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
6.0 MediumAV:N/AC:M/Au:S/C:P/I:P/A:P
Weakness
CWE-362
Updated
2026-11-02
CVE List No score

In F5 BIG-IP 12.1.0 through 12.1.2, permissions enforced by iControl can lag behind the actual permissions assigned to a user if the role_map is not reloaded between the time the permissions are changed and the time of the user's next request. This is a race condition that occurs rarely in normal usage; the typical period in which this is possible is limited to at most a few seconds after the permission change.

Record
CVE-2016-9256
Updated
2026-11-02
EUVDEUVD-2016-10067 No score

In F5 BIG-IP 12.1.0 through 12.1.2, permissions enforced by iControl can lag behind the actual permissions assigned to a user if the role_map is not reloaded between the time the permissions are changed and the time of the user's next request. This is a race condition that occurs rarely in normal usage; the typical period in which this is possible is limited to at most a few seconds after the permission change.

Record
EUVD-2016-10067
Updated
2026-11-03
GitHub AdvisoriesGHSA-mxfw-ggfq-h96h 7.5

In F5 BIG-IP 12.1.0 through 12.1.2, permissions enforced by iControl can lag behind the actual...

In F5 BIG-IP 12.1.0 through 12.1.2, permissions enforced by iControl can lag behind the actual permissions assigned to a user if the role_map is not reloaded between the time the permissions are changed and the time of the user's next request. This is a race condition that occurs rarely in normal usage; the typical period in which this is possible is limited to at most a few seconds after the permission change.

Record
GHSA-mxfw-ggfq-h96h
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-362
Updated
2026-11-02

Affected products

History

History
WhenChangedSources
2026-11-03aliases, productsEUVD
2026-11-02createdCVE List, GitHub Advisories, NVD

References

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