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NVD / CVE Program· CNA NEC

CVE-2021-20698: Sharp NEC Displays (UN462A R1.300 and prior to it, UN462VA R1.300 and prior to it, UN492S R1.300 and prior to it, UN492VS R1.300 and prior t

Noroxi assessment

Priority: Monitor (action score 39/100)

  • 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: 1.4% (FIRST EPSS); higher than 73.8% 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

Sharp NEC Displays (UN462A R1.300 and prior to it, UN462VA R1.300 and prior to it, UN492S R1.300 and prior to it, UN492VS R1.300 and prior to it, UN552A R1.300 and prior to it, UN552S R1.300 and prior to it, UN552VS R1.300 and prior to it, UN552 R1.300 and prior to it, UN552V R1.300 and prior to it, UX552S R1.300 and prior to it, UX552 R1.300 and prior to it, V864Q R2.000 and prior to it, C861Q R2.000 and prior to it, P754Q R2.000 and prior to it, V754Q R2.000 and prior to it, C751Q R2.000 and prior to it, V984Q R2.000 and prior to it, C981Q R2.000 and prior to it, P654Q R2.000 and prior to it, V654Q R2.000 and prior to it, C651Q R2.000 and prior to it, V554Q R2.000 and prior to it, P404 R3.200 and prior to it, P484 R3.200 and prior to it, P554 R3.200 and prior to it, V404 R3.200 and prior to it, V484 R3.200 and prior to it, V554 R3.200 and prior to it, V404-T R3.200 and prior to it, V484-T R3.200 and prior to it, V554-T R3.200 and prior to it, C501 R2.000 and prior to it, C551 R2.000 and prior to it, C431 R2.000 and prior to it) allows an attacker to obtain root privileges and execute remote code by sending unintended parameters that contain specific characters in http request.

CriticalCVSS 9.8 · v3.1—No exploit No fix recorded
Published
Jun 7, 2021
Updated
Jun 16, 2026
EPSS
1.4% · 73th percentile
CWE
—

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.4%

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.

Follow CVE-2021-20698

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

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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
sharp-nec-displaysun462a firmware
sharp-nec-displaysun462a
sharp-nec-displaysun462va firmware
sharp-nec-displaysun462va
sharp-nec-displaysun492s firmware
sharp-nec-displaysun492s
sharp-nec-displaysun492vs firmware
sharp-nec-displaysun492vs
sharp-nec-displaysun552a firmware
sharp-nec-displaysun552a
sharp-nec-displaysun552s firmware
sharp-nec-displaysun552s

and 56 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • sharp-nec-displays c431 firmwareup to r2.000 inclusive
  • sharp-nec-displays c501 firmwareup to r2.000 inclusive
  • sharp-nec-displays c551 firmwareup to r2.000 inclusive
  • sharp-nec-displays c651q firmwareup to r2.000 inclusive
  • sharp-nec-displays c751q firmwareup to r2.000 inclusive
  • sharp-nec-displays c861q firmwareup to r2.000 inclusive
  • sharp-nec-displays c981q firmwareup to r2.000 inclusive
  • sharp-nec-displays p404 firmwareup to r3.201 inclusive
  • sharp-nec-displays p484 firmwareup to r3.201 inclusive
  • sharp-nec-displays p554 firmwareup to r3.201 inclusive
  • sharp-nec-displays p654q firmwareup to r2.000 inclusive
  • sharp-nec-displays p754q firmwareup to r2.000 inclusive
  • sharp-nec-displays un462a firmwareup to r1.300 inclusive
  • sharp-nec-displays un462va firmwareup to r1.300 inclusive
  • sharp-nec-displays un492s firmwareup to r1.300 inclusive
  • sharp-nec-displays un492vs firmwareup to r1.300 inclusive
  • sharp-nec-displays un552 firmwareup to r1.300 inclusive
  • sharp-nec-displays un552a firmwareup to r1.300 inclusive
  • sharp-nec-displays un552s firmwareup to r1.300 inclusive
  • sharp-nec-displays un552v firmwareup to r1.300 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (NEC). Independent of NVD's CPE analysis and usually ahead of it.

  • Sharp Display Solutions, Ltd. C431

    • up to and including R2.000affected

  • Sharp Display Solutions, Ltd. C501

    • up to and including R2.000affected

  • Sharp Display Solutions, Ltd. C551

    • up to and including R2.000affected

  • Sharp Display Solutions, Ltd. C651Q

    • up to and including R2.000affected

  • Sharp Display Solutions, Ltd. C751Q

    • up to and including R2.000affected

  • Sharp Display Solutions, Ltd. C861Q

    • up to and including R2.000affected

  • Sharp Display Solutions, Ltd. C981Q

    • up to and including R2.000affected

  • Sharp Display Solutions, Ltd. P404

    • up to and including R3.201affected

  • Sharp Display Solutions, Ltd. P484

    • up to and including R3.201affected

  • Sharp Display Solutions, Ltd. P554

    • up to and including R3.201affected

  • Sharp Display Solutions, Ltd. P654Q

    • up to and including R2.000affected

  • Sharp Display Solutions, Ltd. P754Q

    • up to and including R2.000affected

Same product

sharp-nec-displays: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-20699Sharp NEC Displays ((UN462A R1.300 and prior to it, UN462VA R1.300 and prior to it, UN492S R1.300 and prior to it, UN492VS R1.300 and prior
    39Monitor

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.

No history yet (it accumulates with the daily EPSS job).

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.

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
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

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.

All records