How severe is CVE-2026-2812?

CVE-2026-2812 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-2812 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-2812?

CVE-2026-2812 affects Esri Arcgis Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2812?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-2812 have an EU (EUVD) identifier?

Yes. CVE-2026-2812 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31147.

When was CVE-2026-2812 published?

CVE-2026-2812 was published on 2026-05-20 and last updated on 2026-06-17.

CVE-2026-2812

CVE-2026-2812 is a medium-severity vulnerability in Esri Arcgis Server with a CVSS 3.x base score of 5.3. 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-287.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31147
Weakness: CWE-287
Affected product: Esri Arcgis Server
Published: 2026-05-20
Last modified: 2026-06-17

Description

ArcGIS Server contains an improper authentication vulnerability in an undocumented administrative endpoint. An unauthenticated attacker could exploit this issue by sending a crafted request to the endpoint. Successful exploitation may result in disruption of the web-based browsing interface. This issue affects ArcGIS Server 12.0 and earlier.

Frequently asked questions

What is CVE-2026-2812?: ArcGIS Server contains an improper authentication vulnerability in an undocumented administrative endpoint. An unauthenticated attacker could exploit this issue by sending a crafted request to the endpoint. Successful exploitation may result in disruption of the web-based browsing interface. This issue affects ArcGIS Server 12.0 and earlier.
How severe is CVE-2026-2812?: CVE-2026-2812 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-2812 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2812?: CVE-2026-2812 affects Esri Arcgis Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2812?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-2812 have an EU (EUVD) identifier?: Yes. CVE-2026-2812 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31147.
When was CVE-2026-2812 published?: CVE-2026-2812 was published on 2026-05-20 and last updated on 2026-06-17.

References

https://www.esri.com/arcgis-blog/products/trust-arcgis/administration/april2026_security_bulletin

Affected products (1)

cpe:2.3:a:esri:arcgis_server:*:*:*:*:*:*:*:*

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