CVE-2015-1635

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2022-02-10. Federal remediation due 2022-08-10.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

99.99% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 99.9% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2015-04-14 20:00Z11 YR AGO

Last updated

2025-10-22 00:05Z1 YR AGO

Reserved

2015-02-17

Assigning CNA

microsoft

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

• CWE-94Improper Control of Generation of Code ('Code Injection')Base

Data version

5.1

Document digest

1040c43fc7732a4cba7babe9e9bd2e4e89f1302caa30fddf73cde34bd3246ed6

• docs.microsoft.comMS15-034https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-034vendor-advisoryx_refsource_MS
• www.exploit-db.com36773https://www.exploit-db.com/exploits/36773/exploitx_refsource_EXPLOIT-DB
• www.osvdb.org120629http://www.osvdb.org/120629vdb-entryx_refsource_OSVDB
• www.securitytracker.com1032109http://www.securitytracker.com/id/1032109vdb-entryx_refsource_SECTRACK
• www.securityfocus.com74013http://www.securityfocus.com/bid/74013vdb-entryx_refsource_BID
• www.exploit-db.com36776https://www.exploit-db.com/exploits/36776/exploitx_refsource_EXPLOIT-DB
• packetstormsecurity.comhttp://packetstormsecurity.com/files/131463/Microsoft-Windows-HTTP.sys-Proof-Of-Concept.htmlx_refsource_MISC
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-1635government-resource