How severe is CVE-2021-32959?

CVE-2021-32959 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-32959 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-32959?

CVE-2021-32959 affects Aveva Suitelink. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-32959?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-32959 published?

CVE-2021-32959 was published on 2021-09-23 and last updated on 2026-06-17.

CVE-2021-32959

CVE-2021-32959 is a high-severity vulnerability in Aveva Suitelink with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 7.5
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-122
Affected product: Aveva Suitelink
Published: 2021-09-23
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2021-32959?: Heap-based buffer overflow in SuiteLink server while processing commands 0x05/0x06
How severe is CVE-2021-32959?: CVE-2021-32959 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-32959 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-32959?: CVE-2021-32959 affects Aveva Suitelink. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-32959?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-32959 published?: CVE-2021-32959 was published on 2021-09-23 and last updated on 2026-06-17.

References

https://www.aveva.com/content/dam/aveva/documents/support/cyber-security-updates/SecurityBulletin_AVEVA-2021-003.pdf

Affected products (1)

cpe:2.3:a:aveva:suitelink:*:*:*:*:*:*:*:*

More vulnerabilities in Aveva Suitelink

CVE-2021-32999 — High (CVSS 7.5): Improper handling of exceptional conditions in SuiteLink server while processing command 0x01
CVE-2021-32987 — High (CVSS 7.5): Null pointer dereference in SuiteLink server while processing command 0x0b
CVE-2021-32979 — High (CVSS 7.5): Null pointer dereference in SuiteLink server while processing commands 0x04/0x0a
CVE-2021-32971 — High (CVSS 7.5): Null pointer dereference in SuiteLink server while processing command 0x07
CVE-2021-32963 — High (CVSS 7.5): Null pointer dereference in SuiteLink server while processing commands 0x03/0x10

All CVEs affecting Aveva Suitelink →

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