CVE-2021-3965: Certain HP DesignJet products may be vulnerable to unauthenticated HTTP requests which allow viewing and downloading of print job previews.
Noroxi assessment
Priority: Monitor (action score 32/100)
- 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: 5.2% (FIRST EPSS); higher than 92.4% of all records.
- 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 the record, no fixed version is available yet.
Low priority for now. Update when a fix is released; follow the vendor's advisory.
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
- Published
- Jan 14, 2022
- Updated
- Jun 17, 2026
- EPSS
- 5.2% · 92th percentile
- CWE
- CWE-639
Report tools
Action score
32
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 2 / 30 · 5.2%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- No fixed version yet
If any of these changes, we'll tell you in the daily email digest.
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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.
We use this product, ask for helpAffected 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.
| Vendor | Product | CPE |
|---|---|---|
| hp | designjet t920 cr355a firmware | cpe:2.3:o:hp:designjet_t920_cr355a_firmware |
| hp | designjet t920 cr355a | cpe:2.3:h:hp:designjet_t920_cr355a |
| hp | designjet t920 cr355b firmware | cpe:2.3:o:hp:designjet_t920_cr355b_firmware |
| hp | designjet t920 cr355b | cpe:2.3:h:hp:designjet_t920_cr355b |
| hp | designjet t920 cr354a firmware | cpe:2.3:o:hp:designjet_t920_cr354a_firmware |
| hp | designjet t920 cr354a | cpe:2.3:h:hp:designjet_t920_cr354a |
| hp | designjet t930 l2y22a firmware | cpe:2.3:o:hp:designjet_t930_l2y22a_firmware |
| hp | designjet t930 l2y22a | cpe:2.3:h:hp:designjet_t930_l2y22a |
| hp | designjet t930 l2y22b firmware | cpe:2.3:o:hp:designjet_t930_l2y22b_firmware |
| hp | designjet t930 l2y22b | cpe:2.3:h:hp:designjet_t930_l2y22b |
| hp | designjet t930 l2y21a firmware | cpe:2.3:o:hp:designjet_t930_l2y21a_firmware |
| hp | designjet t930 l2y21a | cpe:2.3:h:hp:designjet_t930_l2y21a |
and 42 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- hp designjet t1530 l2y23a firmwaremry_07_07_04.1
- hp designjet t1530 l2y24a firmwaremry_07_07_04.1
- hp designjet t1530 l2y24b firmwaremry_07_07_04.1
- hp designjet t2530 l2y25a firmwaremry_07_07_04.1
- hp designjet t2530 l2y26a firmwaremry_07_07_04.1
- hp designjet t2530 l2y26b firmwaremry_07_07_04.1
- hp designjet t3500 b9e24a firmwareaeneas_04_09_06.1
- hp designjet t3500 b9e24b firmwareaeneas_04_09_06.1
- hp designjet t3500 b9e25a firmwareaeneas_04_09_06.1
- hp designjet t920 cr354a firmwaremry_07_07_04.1
- hp designjet t920 cr355a firmwaremry_07_07_04.1
- hp designjet t920 cr355b firmwaremry_07_07_04.1
- hp designjet t930 l2y21a firmwaremry_07_07_04.1
- hp designjet t930 l2y21b firmwaremry_07_07_04.1
- hp designjet t930 l2y22a firmwaremry_07_07_04.1
- hp designjet t930 l2y22b firmwaremry_07_07_04.1
- hp designjet z6600 f2s71a firmwareptr6_03_07_06.1
- hp designjet z6600 f2s71ar firmwareptr6_03_07_06.1
- hp designjet z6610 2qu13a firmwarepx6_06_05_02.1
- hp designjet z6610 2qu13b firmwarepx6_06_05_02.1
Versions reported by the vendor
Affected version ranges reported by the assigning authority (hp). Independent of NVD's CPE analysis and usually ahead of it.
n/a HP DesignJet Printer
- before MRY_07_07_04.1, before AENEAS_04_09_06.1, before PTR8_03_07_06.1, before PX8_06_05_02.1, before PX6_06_05_02.1affected
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.
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 researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
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
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-639 · Authorization Bypass Through User-Controlled KeyCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
nvd-primary
Root cause
The endpoint fetches the record by the ID sent in the request, but never checks whether the record belongs to the requesting user.
The bug in code
The whole CWE-639 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
const invoice = await Invoice.findById(req.params.id);
res.json(invoice);Fixed
const invoice = await Invoice.findOne({
id: req.params.id,
ownerId: req.user.id,
});
if (!invoice) return res.sendStatus(404);
res.json(invoice);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
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.