CVE-2021-27211

Status: ModifiedHigh (7.5)—PoC

Severity7.5High · CVSS 3.1

Exploitation probability3.25 %higher than 88% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitAvailableProof of concept on GitHub (unverified)

steghide 0.5.1 relies on a certain 32-bit seed value, which makes it easier for attackers to detect hidden data.

CVSS

Base score: 7.5
Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 3.25 %
Percentile among all scored CVEs: 88
Score date: 10/21/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Proof of concept on GitHub (unverified) · List of proofs of concept on GitHub

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

Affected technologies (1)

Steghide Project — Steghide

CWEs

CWE-335

References

Show 8 references

Raw JSON (NVD)

Show

{
  "id": "CVE-2021-27211",
  "cveTags": [],
  "metrics": {
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        "source": "nvd@nist.gov",
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          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
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  "affected": [
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  "published": "2021-02-15T19:15:13.207",
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    {
      "url": "https://sourceforge.net/projects/steghide/files/steghide/0.5.1/",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "steghide 0.5.1 relies on a certain 32-bit seed value, which makes it easier for attackers to detect hidden data."
    },
    {
      "lang": "es",
      "value": "steghide versión 0.5.1, se basa en un cierto valor de seed de 32 bits, lo que facilita a atacantes la detección de datos ocultos"
    }
  ],
  "lastModified": "2026-06-17T03:44:28.360",
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}