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Fencer Vulns
critical 9.8

CVE-2021-29998 json

An issue was discovered in Wind River VxWorks before 6.5.

published 2021-04-13 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-16457

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.2%
EPSS 4.2% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

An issue was discovered in Wind River VxWorks before 6.5. There is a possible heap overflow in dhcp client.

Patch / fix

  • windriver vxworks 6.5
  • siemens sinamics_perfect_harmony_gh180_firmware 2022

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-194-12 updated cvss 5.9

Siemens VxWorks-based Industrial Products (Update C)

  • Siemens RUGGEDCOM WIN5100 series subscriber unit Siemens RUGGEDCOM WIN5200 series subscriber unit Siemens SCALANCE X200-4P IRT (6GK5200-4AH00-2BA3) Siemens SCALANCE X201-3P IRT (6GK5201-3BH00-2BA3) Siemens SCALANCE X201-3P IRT PRO (6GK5201-3BH00-2BD2) Siemens SCALANCE X202-2IRT (6GK5202-2BB00-2BA3)
    +34 more products
    Siemens SCALANCE X202-2P IRT (6GK5202-2BH00-2BA3) Siemens SCALANCE X202-2P IRT PRO (6GK5202-2JR00-2BA6) Siemens SCALANCE X204-2 (6GK5204-2BB10-2AA3) Siemens SCALANCE X204-2FM (6GK5204-2BB11-2AA3) Siemens SCALANCE X204-2LD (6GK5204-2BC10-2AA3) Siemens SCALANCE X204-2LD TS (6GK5204-2BC10-2CA2) Siemens SCALANCE X204-2TS (6GK5204-2BB10-2CA2) Siemens SCALANCE X204IRT (6GK5204-0BA00-2BA3) Siemens SCALANCE X204IRT PRO (6GK5204-0JA00-2BA6) Siemens SCALANCE X206-1 (6GK5206-1BB10-2AA3) Siemens SCALANCE X206-1LD (6GK5206-1BC10-2AA3) Siemens SCALANCE X208 (6GK5208-0BA10-2AA3) Siemens SCALANCE X208PRO (6GK5208-0HA10-2AA6) Siemens SCALANCE X212-2 (6GK5212-2BB00-2AA3) Siemens SCALANCE X212-2LD (6GK5212-2BC00-2AA3) Siemens SCALANCE X216 (6GK5216-0BA00-2AA3) Siemens SCALANCE X224 (6GK5224-0BA00-2AA3) Siemens SCALANCE X302-7 EEC (2x 24V coated) (6GK5302-7GD00-2GA3) Siemens SCALANCE X302-7 EEC (2x 24V) (6GK5302-7GD00-2EA3) Siemens SCALANCE X302-7 EEC (2x 230V coated) (6GK5302-7GD00-4GA3) Siemens SCALANCE X302-7 EEC (2x 230V) (6GK5302-7GD00-4EA3) Siemens SCALANCE X302-7 EEC (24V coated) (6GK5302-7GD00-1GA3) Siemens SCALANCE X302-7 EEC (24V) (6GK5302-7GD00-1EA3) Siemens SCALANCE X302-7 EEC (230V coated) (6GK5302-7GD00-3GA3) Siemens SCALANCE X302-7 EEC (230V) (6GK5302- 7GD00-3EA3) Siemens SCALANCE X304-2FE (6GK5304-2BD00-2AA3) Siemens SCALANCE X306-1LD FE (6GK5306-1BF00-2AA3) Siemens SCALANCE X307-2 EEC (2x 24V coated) (6GK5307-2FD00-2GA3) Siemens SCALANCE X307-2 EEC (2x 24V) (6GK5307-2FD00-2EA3) Siemens SCALANCE X307-2 EEC (2x 230V coated) (6GK5307-2FD00-4GA3) Siemens SCALANCE X307-2 EEC (2x 230V) (6GK5307-2FD00-4EA3) Siemens SCALANCE X307-2 EEC (24V coated) (6GK5307-2FD00-1GA3) Siemens SCALANCE X307-2 EEC (24V) (6GK5307-2FD00-1EA3) Siemens SCALANCE X307-2 EEC (230V coated) (6GK5307-2FD00-3GA3)
    affected: fixed in v4.1.4 support.industry.siemens.com

70 more affected in the full advisory

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

cisa ICSA-22-102-02 updated cvss 9.0

Mitsubishi Electric MELSEC-Q Series C Controller Module

  • Mitsubishi Electric Module Q12DCCPU-V 5 digits of serial number <= 24031
    affected: mitigation “Update to 24032 (first 5 digits of serial number) or later. Contact a Mitsubishi Electric representative for more information.” mitsubishielectric.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

4.21% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.