CVE-2026-2812: Esri ArcGIS Server · Improper Authentication
Affects Esri ArcGIS ServerSource CVE Database V5
Not known to be exploited · CVSS 5.3 Medium.
Data as of 30 Oct 2026, 11:52 UTC
- 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:NExploitation evidence
Disclosed: evidence found.
CVE published 20 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| EsriArcGIS Server | Affected
| 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.