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UK Cyber Defence
VulnerabilityAnalyzed

CVE-2026-49160

Uncontrolled resource consumption in HTTP/2 allows an unauthorized attacker to deny service over a network.

HIGH 7.5EPSS 56.6%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 56.6%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.

Description

Uncontrolled resource consumption in HTTP/2 allows an unauthorized attacker to deny service over a network.

CVSS 3.1
7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
56.59% probability · 99th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-400
Affected
microsoft/windows 10 1607 · microsoft/windows 10 1809 · microsoft/windows 10 21h2 · microsoft/windows 10 22h2 · microsoft/windows 11 23h2 · microsoft/windows 11 24h2 · microsoft/windows 11 25h2 · microsoft/windows 11 26h1 · microsoft/windows server 2016 · microsoft/windows server 2019 · microsoft/windows server 2022 · microsoft/windows server 2025
Source
secure@microsoft.com
EPSS trend
0%30%60%24 September 2026: 1.17%25 October 2026: 56.59%30 October 2026: 56.59%24 September 202630 October 2026

EPSS moved from 1.2% on 24 September 2026 to 56.6% on 30 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.