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CVE-2025-21091· NVD / CVE Program· CNA f5

BIG-IP SNMP vulnerability

Noroxi assessment

Priority: Monitor (action score 34/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.45% (FIRST EPSS).
  • 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.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: F5 BIG-IP Hotfix-BIGIP-15.1.10.6.0.11.6-ENG.iso, Hotfix-BIGIP-16.1.5.2.0.7.5-ENG.iso.

Low priority for now. Upgrade to F5 BIG-IP Hotfix-BIGIP-15.1.10.6.0.11.6-ENG.iso, Hotfix-BIGIP-16.1.5.2.0.7.5-ENG.iso or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

When SNMP v1 or v2c are disabled on the BIG-IP, undisclosed requests can cause an increase in memory resource utilization. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

HighCVSS 8.7 · v4.0—No exploit Fix available
Published
Feb 5, 2025
Updated
Jun 17, 2026
EPSS
0.4% · 37th percentile

Report tools

JSON

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.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-21091

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
f5big-ip access policy manager
f5big-ip advanced firewall manager
f5big-ip advanced web application firewall
f5big-ip analytics
f5big-ip application acceleration manager
f5big-ip application security manager
f5big-ip application visibility and reporting
f5big-ip automation toolchain
f5big-ip carrier-grade nat
f5big-ip container ingress services
f5big-ip ddos hybrid defender
f5big-ip domain name system

and 9 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 manager15.1.0 and later · up to 15.1.10 inclusive
  • f5 big-ip access policy manager16.1.0 and later · before 16.1.6
  • 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 16.1.6
  • f5 big-ip advanced firewall manager17.1.0 and later · before 17.1.2
  • f5 big-ip advanced firewall manager15.1.0 and later · up to 15.1.10 inclusive
  • f5 big-ip advanced web application firewall16.1.0 and later · before 16.1.6
  • f5 big-ip advanced web application firewall15.1.0 and later · up to 15.1.10 inclusive
  • f5 big-ip advanced web application firewall17.1.0 and later · before 17.1.2
  • f5 big-ip analytics16.1.0 and later · before 16.1.6
  • f5 big-ip analytics15.1.0 and later · up to 15.1.10 inclusive
  • f5 big-ip analytics17.1.0 and later · before 17.1.2
  • f5 big-ip application acceleration manager16.1.0 and later · before 16.1.6
  • f5 big-ip application acceleration manager15.1.0 and later · up to 15.1.10 inclusive
  • 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 16.1.6
  • f5 big-ip application security manager15.1.0 and later · up to 15.1.10 inclusive
  • f5 big-ip application security manager17.1.0 and later · before 17.1.2
  • f5 big-ip application visibility and reporting15.1.0 and later · up to 15.1.10 inclusive
  • f5 big-ip application visibility and reporting16.1.0 and later · before 16.1.6

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

    • 17.1.0 and later · before 17.1.2affected
    • 16.1.0 and lateraffectedfixed in Hotfix-BIGIP-16.1.5.2.0.7.5-ENG.iso
    • 15.1.0 and lateraffectedfixed in Hotfix-BIGIP-15.1.10.6.0.11.6-ENG.iso

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

Published before and after this one in the same product

  • ← EarlierCVE-2025-20058Feb 5, 2025 · BIG-IP message routing vulnerability
    35Monitor
  • ← EarlierCVE-2025-21087Feb 5, 2025 · When Client or Server SSL profiles are configured on a Virtual Server, or DNSSEC signing operations are in use, undisclosed traffic can caus
    35Monitor
  • Later →CVE-2025-23239Feb 5, 2025 · BIG-IP iControl REST vulnerability
    34Monitor

Remediation

Which version to upgrade to

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

Product / packageFixed versionSource
F5 BIG-IPHotfix-BIGIP-15.1.10.6.0.11.6-ENG.isoVendor (CNA)
F5 BIG-IPHotfix-BIGIP-16.1.5.2.0.7.5-ENG.isoVendor (CNA)

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.

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-401 · Missing Release of Memory after Effective Lifetime

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

Attack context

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

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

All records