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CVE-2025-36557· NVD / CVE Program· CNA f5

BIG-IP HTTP vulnerability

When an HTTP profile with the Enforce RFC Compliance option is configured on a virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

HighCVSS 8.7 · v4.0—No exploit No fix recorded
Published
May 7, 2025
Updated
Jun 17, 2026
EPSS
0.4% · 35th percentile
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Action score

34

Monitor

Low priority for now.

CVSS
34 / 40 · 8.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · f5
7.5
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

VendorProduct
f5big-ip access policy manager
f5big-ip advanced firewall manager
f5big-ip analytics
f5big-ip application acceleration manager
f5big-ip application security manager
f5big-ip domain name system
f5big-ip fraud protection service
f5big-ip global traffic manager
f5big-ip link controller
f5big-ip local traffic manager
f5big-ip policy enforcement manager
f5big-ip next cloud-native network functions

and 1 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • f5 big-ip access policy manager16.1.0 and later · before 16.1.5
  • f5 big-ip access policy manager17.1.0 and later · before 17.1.2
  • f5 big-ip advanced firewall manager16.1.0 and later · before 16.1.5
  • f5 big-ip advanced firewall manager17.1.0 and later · before 17.1.2
  • f5 big-ip analytics16.1.0 and later · before 16.1.5
  • f5 big-ip analytics17.1.0 and later · before 17.1.2
  • f5 big-ip application acceleration manager16.1.0 and later · before 16.1.5
  • f5 big-ip application acceleration manager17.1.0 and later · before 17.1.2
  • f5 big-ip application security manager16.1.0 and later · before 16.1.5
  • f5 big-ip application security manager17.1.0 and later · before 17.1.2
  • f5 big-ip domain name system16.1.0 and later · before 16.1.5
  • f5 big-ip domain name system17.1.0 and later · before 17.1.2
  • f5 big-ip fraud protection service16.1.0 and later · before 16.1.5
  • f5 big-ip fraud protection service17.1.0 and later · before 17.1.2
  • f5 big-ip global traffic manager17.1.0 and later · before 17.1.2
  • f5 big-ip global traffic manager16.1.0 and later · before 16.1.5
  • f5 big-ip link controller16.1.0 and later · before 16.1.5
  • f5 big-ip link controller17.1.0 and later · before 17.1.2
  • f5 big-ip local traffic manager17.1.0 and later · before 17.1.2
  • f5 big-ip local traffic manager16.1.0 and later · before 16.1.5

Versions reported by the vendor

Affected version ranges reported by the assigning authority (f5). Independent of NVD's CPE analysis and usually ahead of it.

  • F5 BIG-IP

    • 17.5.0 and laternot affected
    • 17.1.0 and later · before 17.1.2affected
    • 16.1.0 and later · before 16.1.5affected
    • 15.1.0 and laternot affected

  • F5 BIG-IP Next CNF

    • 2.0.0 and laternot affected
    • 1.1.0 and later · before 1.4.0affected

  • F5 BIG-IP Next SPK

    • 1.8.0 and later · before 2.0.0affected
    • 1.7.0 and later · before 1.7.9affected

Same product

f5: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-1388On F5 BIG-IP 16.1.x versions prior to 16.1.2.2, 15.1.x versions prior to 15.1.5.1, 14.1.x versions prior to 14.1.4.6, 13.1.x versions prior KEV
    99Now
  • CVE-2021-22986On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, and 12.1.x before 12.1.5.3 KEV
    99Now
  • CVE-2020-5902In BIG-IP versions 15.0.0-15.1.0.3, 14.1.0-14.1.2.5, 13.1.0-13.1.3.3, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.1, the Traffic Management User InteKEV
    99Now
  • CVE-2023-46747BIG-IP Configuration utility unauthenticated remote code execution vulnerabilityKEV
    98Now
  • CVE-2021-22991On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, and 12.1.x before 12.1.5.3,KEV
    87Now
  • CVE-2026-94127BIG-IP APM OAuth vulnerabilityKEV
    68This week

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-365250 days apartBIG-IP APM PingAccess Virtual Server Vulnerability
    34Monitor
  • CVE-2025-2341291 days apartBIG-IP APM access profile vulnerability
    34Monitor
  • CVE-2025-53474161 days apartBIG-IP iRules vulnerability
    34Monitor
  • CVE-2026-40067371 days apartBIG-IP APM Vulnerability
    34Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Root cause

When data is copied, the source length is not compared with the size of the destination buffer. Excess data overwrites adjacent memory.

The bug in code

The whole CWE-120 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

c
char buf[256];memcpy(buf, pkt->data, pkt->len);

Fixed

c
char buf[256];if (pkt->len > sizeof(buf)) {  return -EINVAL;}memcpy(buf, pkt->data, pkt->len);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records