8.8

CVE-2026-65813: microsoft exchange_server Server-Side Request Forgery (SSRF)

CVSS: 8.8v3.1HighAnalyzed
Published 11-08-2026Last modified 08-10-2026
Open JSON

Vulnerability summary

CVE-2026-65813 is a high (CVSS 8.8) Server-Side Request Forgery (SSRF) vulnerability in microsoft exchange_server. EPSS estimates a 0.94% chance of exploitation in the next 30 days, higher than 60.2% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
0.94%
0%100%
Low · +0.29 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 11-08-2026
    PublishedVulnerability first disclosed.
  2. 08-10-2026
    Last modifiedVulnerability information updated.

Description

Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.94%

Chance of exploitation in the next 30 days

Percentile

60%

Versus all other CVEs

30-day change

+0.29 pp

From 0.65% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.94%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft6 products
  • exchange_serverEOL2016 | 2016:cumulative_update_1 | 2016:cumulative_update_10 | 2016:cumulative_update_11 | 2016:cumulative_update_12 | 2016:cumulative_update_13 | 2016:cumulative_update_14 | 2016:cumulative_update_15 | 2016:cumulative_update_16 | 2016:cumulative_update_17 | 2016:cumulative_update_18 | 2016:cumulative_update_19 | 2016:cumulative_update_2 | 2016:cumulative_update_20 | 2016:cumulative_update_21 | 2016:cumulative_update_22 | 2016:cumulative_update_3 | 2016:cumulative_update_4 | 2016:cumulative_update_5 | 2016:cumulative_update_6 | 2016:cumulative_update_7 | 2016:cumulative_update_8 | 2016:cumulative_update_9 | 2019 | 2019:cumulative_update_1 | 2019:cumulative_update_10 | 2019:cumulative_update_11 | 2019:cumulative_update_12 | 2019:cumulative_update_13 | 2019:cumulative_update_2 | 2019:cumulative_update_3 | 2019:cumulative_update_4 | 2019:cumulative_update_5 | 2019:cumulative_update_6 | 2019:cumulative_update_7 | 2019:cumulative_update_8 | 2019:cumulative_update_9
  • exchange_server_subscription_edition< 15.02.2562.046
  • microsoft exchange server 2016 cumulative update 23≥ 15.01.0.0, < 15.01.2507.072
  • microsoft exchange server 2019 cumulative update 14≥ 15.02.0.0, < 15.02.1544.044
  • microsoft exchange server 2019 cumulative update 15≥ 15.02.0.0, < 15.02.1748.049

1 vendor · 6 products

References

1 links