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Page generated: 09 Nov 2026, 03:19 UTC

CVE-2017-17562

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Embedthis GoAhead before 3.6.5 allows remote code execution if CGI is enabled and a CGI program is dynamically linked. This is a result of initializing the environment of forked CGI scripts using untrusted HTTP request parameters in the cgiHandler function in cgi.c. When combined with the glibc dynamic linker, this behaviour can be abused for remote code execution using special parameter names such as LD_PRELOAD. An attacker can POST their shared object payload in the body of the request, and reference it using /proc/self/fd/0.

CVSS 8.1 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE

0.0/10

REALITY · THREAT PRIORITY

8.7/10

General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?

Recorded exploitation baseline: +7.00
Technical severity: CVSS 8.1: +1.21
Fresh EPSS: 97.13%: +0.49

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

Sources: 6 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

SOC Prime

Press · 19 Nov 2025, 08:00 · APT41 group Tactics vs Ransomware Emulations in AttackIQ Ransom Tales - SOC Prime

The Hacker News

Press · 07 Nov 2025, 08:00 · From Log4j to IIS, China’s Hackers Turn Legacy Bugs into Global Espionage Tools - The Hacker News

SOC Prime

Press · 07 Nov 2025, 08:00 · Chinese APT Exploits CVE-2022-26134 & CVE-2021-44228 - SOC Prime

SECURITY.COM

Press · 06 Nov 2025, 08:00 · China-linked Actors Maintain Focus on Organizations Influencing U.S. Policy - SECURITY.COM

Huntress

Press · 07 Oct 2025, 07:00 · GoAhead Vulnerability CVE-2017-17562: Analysis, Impact, Mitigation - Huntress

See all 6 source documents

Security Affairs

Press · 04 Dec 2019, 08:00 · Talos experts found a critical RCE in GoAhead Web Server - Security Affairs

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 8.7 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

Public exploit entries / repo candidates

See 1 repos with metrics

Repository	Stars	Forks	Language	Updated
joaomagfreitas/bash-CVE-2017-17562	1	0	Shell	17 Nov 2021, 22:55

Public exploit evidence

exploitdb #43360 2017-12-18
exploitdb #43877 2018-01-24

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 8.1; EPSS 97.1%
Attention, last 30 days: 0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential: network access, no prior privileges, no user interaction, additional attack conditions.
Observed activity: Exploitation recorded in CISA KEV.
Known scale: Not quantified.
Evidence confidence basis: Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:57:50.576100+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline

Published

12 Dec 2017, 19:00

First press mention

04 Dec 2019, 08:00

Added to the CISA KEV catalog

10 Dec 2021, 00:00

Latest press mention

19 Nov 2025, 08:00

Score calculated

05 Nov 2026, 13:57

PoCs on GitHub

2 repositories