HOMEVULNERABILITIESCVE-2021-43350
CRITICAL

CVE-2021-43350

CWE-90Published: November 11, 2021· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

An unauthenticated Apache Traffic Control Traffic Ops user can send a request with a specially-crafted username to the POST /login endpoint of any API version to inject unsanitized content into the LDAP filter.

NVD Source

Technical Analysis

CVE-2021-43350 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Apache1 product(s)
traffic control
Source: NVD CPE · 3 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://www.openwall.com/lists/oss-security/2021/11/11/3
ADVISORYhttp://www.openwall.com/lists/oss-security/2021/11/11/4
ADVISORYhttp://www.openwall.com/lists/oss-security/2021/11/17/1
ADVISORYhttps://trafficcontrol.apache.org/security/
ADVISORYhttp://www.openwall.com/lists/oss-security/2021/11/11/3
ADVISORYhttp://www.openwall.com/lists/oss-security/2021/11/11/4
ADVISORYhttp://www.openwall.com/lists/oss-security/2021/11/17/1
ADVISORYhttps://trafficcontrol.apache.org/security/

All References (8)

→
http://www.openwall.com/lists/oss-security/2021/11/11/3Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2021/11/11/4Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2021/11/17/1Mailing List · Third Party Advisory
→
https://trafficcontrol.apache.org/security/Vendor Advisory
→
http://www.openwall.com/lists/oss-security/2021/11/11/3Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2021/11/11/4Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2021/11/17/1Mailing List · Third Party Advisory
→
https://trafficcontrol.apache.org/security/Vendor Advisory

Quick Facts

CVE IDCVE-2021-43350
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-90
CISA KEVNo
Affected1 vendor(s)
PublishedNov 11, 2021

Related CVEs (CWE-90)

CVE-2011-4069
9.8
CVE-2026-44930
9.8
CVE-2017-14596
9.8
CVE-2023-6905
9.8
CVE-2024-54852
9.8
CVE-2017-8790
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-43350 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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