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VulnerabilityPublished

CVE-2026-2812: Esri ArcGIS Server · Improper Authentication

Affects Esri ArcGIS ServerSource CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 29% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
EsriArcGIS ServerAffected
  • >=11.1 <=12.0
Fixed in–

AI-suggested

Until a fix is available, restricting access to administrative endpoints and applying network-level controls to limit exposure may help reduce risk.

Description

CVE-2026-2812 is an improper authentication vulnerability in Esri ArcGIS Server affecting versions 12.0 and earlier. It involves an undocumented administrative endpoint that allows unauthenticated attackers to send crafted requests. Exploitation can disrupt the web-based browsing interface but does not impact confidentiality or availability. The vulnerability has a medium severity with a CVSS score of 5.3. No official patch or remediation guidance is currently provided by the vendor. There are no known exploits in the wild at this time.

References

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