How severe is CVE-2021-3160?

CVE-2021-3160 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-3160 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3160?

CVE-2021-3160 affects Aca Assuweb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3160?

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

When was CVE-2021-3160 published?

CVE-2021-3160 was published on 2021-01-28 and last updated on 2026-06-17.

CVE-2021-3160

CVE-2021-3160 is a critical-severity vulnerability in Aca Assuweb with a CVSS 3.x base score of 9.8. 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-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Aca Assuweb
Published: 2021-01-28
Last modified: 2026-06-17

Description

Deserialization of untrusted data in the login page of ASSUWEB 359.3 build 1 subcomponent of ACA ASSUREX RENTES product allows a remote attacker to inject unsecure serialized Java object using a specially crafted HTTP request, resulting in an unauthenticated remote code execution on the server.

Frequently asked questions

What is CVE-2021-3160?: Deserialization of untrusted data in the login page of ASSUWEB 359.3 build 1 subcomponent of ACA ASSUREX RENTES product allows a remote attacker to inject unsecure serialized Java object using a specially crafted HTTP request, resulting in an unauthenticated remote code execution on the server.
How severe is CVE-2021-3160?: CVE-2021-3160 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-3160 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3160?: CVE-2021-3160 affects Aca Assuweb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3160?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-3160 published?: CVE-2021-3160 was published on 2021-01-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:aca:assuweb:359.3:*:*:*:*:*:*:*

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