Medium severity5.3NVD Advisory· Published Aug 13, 2025· Updated Jun 17, 2026

CVE-2025-54500

Description

An HTTP/2 implementation flaw allows a denial-of-service (DoS) that uses malformed HTTP/2 control frames in order to break the max concurrent streams limit (HTTP/2 MadeYouReset Attack).

Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

F5, Inc./Big IPcpe-rescue2 versions
17.5.0+ 1 more
- (no CPE)range: 17.5.0
- (no CPE)range: 20.3.0
F5/BIG-IP Next CNFv5
Range: 2.0.0
F5/BIG-IP Next for Kubernetesv5
Range: 2.0.0
F5, Inc./Big IP Spkcpe-rescue
Range: 2.0.0

Patches

Vulnerability mechanics

References

my.f5.com/manage/s/article/K000152001nvdVendor Advisory
www.kb.cert.org/vuls/id/767506nvdThird Party Advisory

News mentions

No linked articles in our index yet.

Severity

MediumCVSS v3.1

5.3/ 10

CVSS v46.9

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/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

Attack vector: Network
Complexity: Low
Privileges: None
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: Low

Vector

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

EPSS

Probability of exploitation in the next 30 days.

0.48%

VYPR risk score

Composite of severity, exploitation, and reach.

0.34medium

cvss	0.345
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

Weaknesses

CWE-770
Allocation of Resources Without Limits or Throttling

CVE ID

CVE-2025-54500

Credits

FA
F5 acknowledges Gal Bar Nahum, Anat Bremler-Barr and Yaniv Harel for bringing this issue to our attention and following the highest standards of coordinated disclosure.
reporter