VDB-294753 · CVE-2025-21087 · K000134888

F5 BIG-IP/BIG-IP Next SSL Profile resource consumption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.3	$0-$5k	0.00

Summaryinfo

A vulnerability marked as problematic has been reported in F5 BIG-IP and BIG-IP Next. This affects an unknown function of the component SSL Profile Handler. Performing a manipulation results in resource consumption. This vulnerability was named CVE-2025-21087. The attack may be initiated remotely. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in F5 BIG-IP and BIG-IP Next (the affected version is unknown). This affects an unknown code of the component SSL Profile Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

When Client or Server SSL profiles are configured on a Virtual Server, or DNSSEC signing operations are in use, undisclosed traffic can cause an increase in memory and CPU resource utilization. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

The advisory is shared at my.f5.com. This vulnerability is uniquely identified as CVE-2025-21087 since 01/22/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 215009 (F5 Networks BIG-IP : TMM vulnerability (K000134888)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (215009). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Firewall Software

Vendor

Name

License

commercial

Website

Vendor: https://f5.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 215009
Nessus Name: F5 Networks BIG-IP : TMM vulnerability (K000134888)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/22/2025 🔍
02/05/2025 +14 days 🔍
02/05/2025 +0 days 🔍
10/21/2025 +258 days 🔍

Sourcesinfo

Vendor: f5.com

Advisory: K000134888
Status: Confirmed

CVE: CVE-2025-21087 (🔍)
GCVE (CVE): GCVE-0-2025-21087
GCVE (VulDB): GCVE-100-294753

Entryinfo

Created: 02/05/2025 18:48
Updated: 10/21/2025 14:07
Changes: 02/05/2025 18:48 (75), 02/06/2025 01:16 (2), 10/21/2025 14:07 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.