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CVE-2015-1635

HTTP.sys in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8, Windows 8.1, and Windows Server 2012 Gold and R2 allows remote attackers to execute arbitrary code via crafted HTTP requests, aka "HTTP.sys Remote Code Execution Vulnerability."

CVSS 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
9.0/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.8: +1.47
  • Fresh EPSS: 100.00%: +0.50

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 10 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

www.trendmicro.com
Press · 09 Oct 2025, 07:00 · RondoDox: From Targeting Pwn2Own Vulnerabilities to Shotgunning Exploits - www.trendmicro.com
The Record from Recorded Future News
Press · 09 Jan 2023, 08:00 · Microsoft Exchange bugs top list of exploited vulnerabilities affecting financial sector - The Record from Recorded Future News
Arctic Wolf
Press · 12 Nov 2022, 22:42 · Recommendations CVE-2022-21907 - Arctic Wolf
TechRepublic
Press · 08 Aug 2022, 07:00 · How older security vulnerabilities continue to pose a threat - TechRepublic
Qualys
Press · 22 Feb 2022, 08:00 · Managing CISA Known Exploited Vulnerabilities with Qualys VMDR - Qualys
See all 10 source documents
McAfee
Press · 12 May 2021, 07:00 · Major HTTP Vulnerability in Windows Could Lead to Wormable Exploit - McAfee
Unit 42
Press · 12 Apr 2021, 07:00 · Network Attack Trends: Internet of Threats (November 2020-January 2021) - Unit 42
Help Net Security
Press · 07 Aug 2017, 07:00 · Siemens CT scanners open to remote compromise via publicly available exploits - Help Net Security
Rapid7
Press · 05 Jun 2015, 07:00 · Remote Coverage for MS15-034 HTTP.sys Vulnerability (CVE-2015-1635) - Rapid7
Qualys
Press · 21 Apr 2015, 07:00 · MS15-034 Analysis And Remote Detection - Qualys

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 9.0 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

5

Public exploit entries / repo candidates

See 5 repos with metrics
RepositoryStarsForksLanguageUpdated
aedoo/CVE-2015-1635-POC95Python20 Jun 2018, 14:33
h3x0v3rl0rd/CVE-2015-1635-POC20C31 Jul 2024, 19:24
Cappricio-Securities/CVE-2015-163510Python24 Jun 2024, 09:23
w01ke/CVE-2015-1635-POC10Python17 Apr 2022, 17:05
moeinmiadi/CVE-2015-1635_PoC00Python20 Oct 2025, 11:23
Public exploit evidence
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9.8; EPSS 100.0%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:57:39.719437+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
14 Apr 2015, 20:00
First press mention
21 Apr 2015, 07:00
Added to the CISA KEV catalog
10 Feb 2022, 00:00
Latest press mention
09 Oct 2025, 07:00
Score calculated
05 Nov 2026, 13:57
PoCs on GitHub
5 repositories