CVE-2021-3661
HIGHCVSS 8.4/10EPSS 0.30%
Last modified
CVE-2021-3661 is a high-severity vulnerability rated 8.4/10 on the CVSS scale. A potential security vulnerability has been identified in certain HP Workstation BIOS (UEFI firmware) which may allow arbitrary code execution. HP is releasing firmware mitigations for the potential vulnerability.. EPSS estimates a 0.30% chance of exploitation in the next 30 days.
Description
A potential security vulnerability has been identified in certain HP Workstation BIOS (UEFI firmware) which may allow arbitrary code execution. HP is releasing firmware mitigations for the potential vulnerability.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Hp | Z1 All-In-One G3 Firmware | 01.31 |
| Hp | Z2 Mini G3 Firmware | 01.83 |
| Hp | Z2 Mini G4 Firmware | 01.08.01 |
| Hp | Z2 Mini G5 Firmware | 01.03.00_rev_a |
| Hp | Z2 Small Form Factor G4 Firmware | 01.08.01 |
| Hp | Z2 Small Form Factor G5 Firmware | 01.03.00_rev_a |
| Hp | Z2 Small Form Factor G8 Firmware | 01.03.00_rev_a |
| Hp | Z2 Tower G4 Firmware | 01.08.01 |
| Hp | Z2 Tower G5 Firmware | 01.03.00_rev_a |
| Hp | Z2 Tower G8 Firmware | 01.03.00_rev_a |
| Hp | Z238 Microtower Firmware | 01.83 |
| Hp | Z240 Small Form Factor Firmware | 01.83 |
| Hp | Z240 Tower Firmware | 01.83 |
| Hp | Z4 G4 Firmware | 02.75 |
| Hp | Z440 Firmware | 2.58 |
| Hp | Z6 G4 Firmware | 02.75 |
| Hp | Z640 Firmware | 2.58 |
| Hp | Z8 G4 Firmware | 02.75 |
| Hp | Z840 Firmware | 2.58 |
| Hp | Zcentral 4r Firmware | 01.18 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3661?
A potential security vulnerability has been identified in certain HP Workstation BIOS (UEFI firmware) which may allow arbitrary code execution. HP is releasing firmware mitigations for the potential vulnerability.
How severe is CVE-2021-3661?
CVE-2021-3661 has a CVSS score of 8.4/10 (HIGH severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3661?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-3660Cockpit (and its plugins) do not seem to protect itself agai…4.3
- CVE-2021-36601GetSimpleCMS 3.3.16 contains a cross-site Scripting (XSS) vu…6.1
- CVE-2021-36603Cross Site Scripting (XSS) in Tasmota firmware 6.5.0 allows …6.1
- CVE-2021-36605engineercms 1.03 is vulnerable to Cross Site Scripting (XSS)…5.4
- CVE-2021-36608Cross Site Scripting (XSS) vulnerability in webTareas 2.2p1 …5.4
- CVE-2021-36609Cross Site Scripting (XSS) vulnerability in webTareas 2.2p1 …5.4
- CVE-2021-36613Mikrotik RouterOs before stable 6.48.2 suffers from a memory…6.5
- CVE-2021-36614Mikrotik RouterOs before stable 6.48.2 suffers from a memory…6.5
- CVE-2021-3662Certain HP Enterprise LaserJet and PageWide MFPs may be vuln…5.4
- CVE-2021-36621Sourcecodester Online Covid Vaccination Scheduler System 1.0…8.1
- CVE-2021-36622Sourcecodester Online Covid Vaccination Scheduler System 1.0…9.8
- CVE-2021-36623Arbitrary File Upload in Sourcecodester Phone Shop Sales Man…9.8
Are you affected by CVE-2021-3661?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST