CVE-2021-4465

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.49% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 42.4% of scored records. A rank, not a probability.

NVD base score

8.7 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD 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: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

NVD analysis status

Deferred. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2025-11-14 22:51Z11 MO AGO

Last updated

2026-04-07 14:05Z6 MO AGO

Reserved

2025-11-14

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

High (CVSS 8.7)

CNA 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:N

Weaknesses

• CWE-400Uncontrolled Resource ConsumptionClass

Data version

5.2

Document digest

51e8de82e399fc3f2042bf99facba09663a69c968e290881c378695156205ae0

• www.zeroscience.mkhttps://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5601.phptechnical-descriptionexploit
• www.exploit-db.comhttps://www.exploit-db.com/exploits/48951exploit
• packetstorm.newshttps://packetstorm.news/files/id/159602exploit
• cxsecurity.comhttps://cxsecurity.com/issue/WLB-2020100122exploit
• exchange.xforce.ibmcloud.comhttps://exchange.xforce.ibmcloud.com/vulnerabilities/190031vdb-entry
• www.request.comhttp://www.request.com/product
• www.vulncheck.comhttps://www.vulncheck.com/advisories/request-serious-play-f3-media-server-remote-dosthird-party-advisory