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Fencer Vulns
high 8.1

CVE-2021-32959 json

AVEVA SuiteLink Server Buffer Overflow

published 2021-09-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-19680

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

Heap-based buffer overflow in SuiteLink server while processing commands 0x05/0x06

Patch / fix

  • aveva suitelink 3.2.002

Vendor advisories

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

cisa ICSA-21-231-01 updated cvss 8.1

ICSA-21-231-01_AVEVA SuiteLink Server

  • AVEVA Software, LLC AVEVA Batch Management < 2014 R2 AVEVA Software, LLC AVEVA Communication Drivers Pack <= 2020 R2 AVEVA Software, LLC AVEVA Data Acquisition Servers AVEVA Software, LLC AVEVA Historian <= 2020 R2 P01 AVEVA Software, LLC AVEVA InTouch <= 2020 AVEVA Software, LLC AVEVA MES < 2014 R2
    +2 more products
    AVEVA Software, LLC AVEVA Operations Integration Core 3.0 and < AVEVA Software, LLC AVEVA System Platform <= 2020 R2 P01
    affected: mitigation “Users with affected versions of these products should apply the corresponding security update. Note a subset of the updates requires activation-based licensing.” aveva.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

0.94% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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

Affected products

  • AVEVA Software, LLC AVEVA System Platform 2020
  • AVEVA Software, LLC AVEVA InTouch 2020
  • AVEVA Software, LLC AVEVA Historian 2020
  • AVEVA Software, LLC AVEVA Communication Drivers Pack 2020
  • AVEVA Software, LLC AVEVA Batch Management 2020
  • AVEVA Software, LLC AVEVA MES 2014

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

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.