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NVD / CVE Program· CNA icscert

CVE-2021-38406: Delta Electronics DOPSoft 2 Out-of-Bounds Write

HighCVSS 7.8 · v3.1KEVWeaponized No fix recorded

Noroxi assessment

Priority: Now (action score 84/100)

  • CISA has confirmed exploitation in the wild (Aug 25, 2022). Remediation deadline for US federal agencies: Sep 15, 2022.
  • Probability of exploitation in the next 30 days: 76.4% (FIRST EPSS); higher than 99.5% of all records.
  • Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Patch today or shut off access. Until a fix is released, restrict access to the affected component and 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 · CISA KEV · FIRST EPSS

Delta Electronic DOPSoft 2 (Version 2.00.07 and prior) lacks proper validation of user-supplied data when parsing specific project files. This could result in multiple out-of-bounds write instances. An attacker could leverage this vulnerability to execute code in the context of the current process.

Published
Sep 17, 2021
Updated
Jun 17, 2026
EPSS
76.4% · 99th percentile

Report tools

JSON

Action score

84

Now

Patch today or shut off access.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
30 / 30 · Listed
EPSS
23 / 30 · 76.4%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.8
CNA · icscert
7.8
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Aug 25, 2022. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Sep 15, 2022.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-38406

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
deltawwdopsoft

Versions reported by the vendor

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

  • Delta Electronics DOPSoft 2

    • unspecified and later · up to and including 2.00.07affected

Affected versions

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

  • deltaww dopsoft2.00 and later · up to 2.00.07 inclusive

Same product

deltaww: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-38402Delta Electronics DOPSoft 2 Stack-Based Buffer Overflow
    33Monitor
  • CVE-2021-33019A stack-based buffer overflow vulnerability in Delta Electronics DOPSoft Version 4.00.11 and prior may be exploited by processing a…
    32Monitor
  • CVE-2020-27277Delta Electronics DOPSoft Version 4.0.8.21 and prior has a null pointer dereference issue while processing project files, which may allow…
    32Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2021-27455Jul 2, 2021 · Delta Electronics DOPSoft Versions 4.0.10.17 and prior are vulnerable to an out-of-bounds read while processing project files, which may…
    22Monitor
  • ← EarlierCVE-2021-38404Sep 17, 2021 · Delta Electronics DOPSoft 2 Heap-based Buffer Overflow
    31Monitor
  • Later →CVE-2022-2966Dec 16, 2022 · Delta Electronics DOPSoft Out-of-bounds Read
    30Monitor

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

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

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.

  1. Published
  2. CISA KEV+341 d
  3. TodayNov 12, 2026+1882 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: patch commit or PR link · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • 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
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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.

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records