How severe is CVE-2022-26503?

CVE-2022-26503 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-26503 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-26503?

CVE-2022-26503 primarily affects Veeam. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-26503?

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-2022-26503 published?

CVE-2022-26503 was published on 2022-03-17 and last updated on 2026-06-17.

CVE-2022-26503

CVE-2022-26503 is a high-severity vulnerability in Veeam with a CVSS 3.x base score of 7.8. 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: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Veeam
Published: 2022-03-17
Last modified: 2026-06-17

Description

Deserialization of untrusted data in Veeam Agent for Windows 2.0, 2.1, 2.2, 3.0.2, 4.x, and 5.x allows local users to run arbitrary code with local system privileges.

Frequently asked questions

What is CVE-2022-26503?: Deserialization of untrusted data in Veeam Agent for Windows 2.0, 2.1, 2.2, 3.0.2, 4.x, and 5.x allows local users to run arbitrary code with local system privileges.
How severe is CVE-2022-26503?: CVE-2022-26503 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-26503 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-26503?: CVE-2022-26503 primarily affects Veeam. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-26503?: 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-2022-26503 published?: CVE-2022-26503 was published on 2022-03-17 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:veeam:veeam:*:*:*:*:*:*:*:*
cpe:2.3:a:veeam:veeam:2.0:*:*:*:*:*:*:*
cpe:2.3:a:veeam:veeam:2.1:*:*:*:*:*:*:*
cpe:2.3:a:veeam:veeam:2.2:*:*:*:*:*:*:*
cpe:2.3:a:veeam:veeam:3.0.2:*:*:*:*:*:*:*

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