HOMEVULNERABILITIESCVE-2021-43310
CRITICAL

CVE-2021-43310

CWE-290Published: September 21, 2022· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

A vulnerability in Keylime before 6.3.0 allows an attacker to craft a request to the agent that resets the U and V keys as if the agent were being re-added to a verifier. This could lead to a remote code execution.

NVD Source

Technical Analysis

CVE-2021-43310 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

keylime1 product(s)
keylime
Source: NVD CPE · 1 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

PATCHhttps://seclists.org/oss-sec/2022/q1/101
PATCHhttps://seclists.org/oss-sec/2022/q1/101
ADVISORYhttps://github.com/keylime/keylime/security/advisories/GHSA-2m39-75g9-ff5r
ADVISORYhttps://github.com/keylime/keylime/security/advisories/GHSA-2m39-75g9-ff5r

All References (4)

→
https://github.com/keylime/keylime/security/advisories/GHSA-2m39-75g9-ff5rMitigation · Third Party Advisory
→
https://seclists.org/oss-sec/2022/q1/101Exploit · Mailing List · Patch · Third Party Advisory
→
https://github.com/keylime/keylime/security/advisories/GHSA-2m39-75g9-ff5rMitigation · Third Party Advisory
→
https://seclists.org/oss-sec/2022/q1/101Exploit · Mailing List · Patch · Third Party Advisory

Quick Facts

CVE IDCVE-2021-43310
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-290
CISA KEVNo
Affected1 vendor(s)
PublishedSep 21, 2022

Related CVEs (CWE-290)

CVE-2026-39858
10.0
CVE-2025-34063
10.0
CVE-2026-54782
10.0
CVE-2026-6213
10.0
CVE-2020-5415
10.0
CVE-2018-25316
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-43310 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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